WO2015176200A1 - Communication device and communication method - Google Patents

Abstract

Disclosed in an embodiment of the present invention are a communication device and method, the communication device comprising: a determination unit for determining a first drive matrix corresponding to X antenna ports, the first drive matrix consisting of T alternative drive matrixes obtained from an alternative drive matrix set; and a drive unit for transmitting the signals of the X antenna ports based on the first drive matrix via an antenna array corresponding to the X antenna ports. Also provided in the embodiment of the present invention are a user-side communication device and method. The communication device and method of the embodiment of the present invention flexibly adjust a plurality of beam characteristics corresponding to a plurality of antenna ports, allowing at least one antenna port to switch between a plurality of beams, thus saving beam resources.

Description

 TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a communication device and a communication method. BACKGROUND OF THE INVENTION Multi-input and multi-output (MIMO) technology has been widely used in wireless communication systems to improve system capacity and ensure cell coverage, such as Long Term Evolution (Long Term Evo lut ion). The downlink of the LTE system uses multi-antenna-based transmit diversity, open-loop/closed-loop spatial division multiplexing, and multi-stream transmission based on demodulation reference signals (DM-RS). Multi-stream transmission based on 匪-RS is the main transmission mode of the LTE Advanced Evolution (LTE-A) system and subsequent systems.

 As shown in Fig. 1, multi-stream transmission based on 匪-RS is usually shaped by two-dimensional beam, and only one vertical beam can be generated. In order to further improve the performance of multi-antenna systems, a number of vertical beamforming schemes are being studied, as shown in Figure 2. Thereby, beamforming in the horizontal and vertical directions can be performed simultaneously, which is called three-dimensional beamforming. In this way, compared with the two-dimensional beamforming, a degree of freedom in the vertical direction is added, so that more users can be multiplexed on the same time-frequency resource, and different users are distinguished by beams in the vertical or horizontal direction. Improve resource utilization.

For a two-dimensional antenna configuration, the base station typically virtualizes multiple antenna elements in a vertical direction into a vertical antenna port (ie, an RF channel, RF Chain) to implement a vertical beam and pass the antenna. The beam corresponding to the port is signaled. The downtilt angle of the beam is set to 12 degrees, and the downtilt angle refers to an angle between a pointing direction of the beam generated by the antenna array corresponding to the antenna port and the horizontal direction. Different antenna arrays can form beams with the same or different downtilt angles. For example, one antenna array forms a beam that points to a first downtilt angle, and the other antenna arrays form beams that point to other identical or different downtilt angles. It should be noted that the beam corresponding to each antenna port is fixed, and the parameters such as the direction, width, and energy of the beam cannot be flexibly adjusted. The antenna port formed by each antenna array corresponds to a fixed beam. Therefore, after setting the beam corresponding to each antenna port in the base station for a certain scenario, if the scene of the base station changes, it is difficult to according to the changed scenario. The antenna array is adjusted accordingly to change the beam corresponding to each antenna port, which increases the complexity of product design and the inflexibility of network deployment. The same horizontal direction also lacks a technical solution to flexibly adjust the beam direction to adapt to different scenarios. Summary of the invention Embodiments of the present invention provide a communication device and a communication method, which are capable of flexibly setting an antenna port in a communication device.

According to a first aspect of an embodiment of the present invention, a communication device is provided. The communication device includes: a determining unit, configured to determine a first driving matrix corresponding to the X antenna ports, where the first driving matrix is composed of T driving candidate matrices obtained by driving the candidate matrix set, The X antenna ports are formed by the first driving matrix, the driving candidate matrix set includes S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, where p is less than or equal to _N , and X is smaller than N, the N is a maximum number of antenna ports that the communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is composed according to the S driving candidate matrices; X, T, S, P are natural numbers;

 a driving unit, configured to send the signals of the X antenna ports by the antenna array corresponding to the X antenna ports according to the first driving matrix.

 Optionally, the determining unit performs a channel shield measurement result of the N antenna ports to determine the X antenna ports; or, the determining unit determines the X antenna ports according to a set criterion.

 Optionally, the determined first driving matrix is semi-statically determined or dynamically determined.

 Optionally, the driving candidate matrix comprises any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices:

(A , f o , ( 0

 0 4 0

, 0 j v 0 I 4 )

 • · · · · · ·

( , f ' 0 r o

 0 0

 :

 , ο J V o , ,

Where 4 is the i-th sub-matrix, [1, Α], the i, k are natural numbers, and T represents transposition. Optionally, each of the sub-matrices corresponds to one downtilt angle.

 Optionally, the determining unit is configured to determine a first driving matrix corresponding to the X antenna ports, and the method includes: selecting, by using the at least one selection matrix, the first driving matrix from the second driving matrix, where The selection matrix includes any one of the following matrices, or any one of the transposed matrices of the following matrices:

The above ( = 1,...,^ is a matrix of N rows and 1 column, the i-th element in the matrix is 1, and the other elements are 0. Optionally, the first antenna port of the X antenna ports A driving matrix is obtained by multiplying the second driving matrix by the selection matrix.

 Optionally, the communication device further includes: an antenna, configured to send a signal; and at least one power amplifier, the power amplifier being located between the driving unit and the antenna, configured to perform amplification processing on the signal.

 Optionally, the T driving candidate matrices obtained according to the driving candidate matrix set are τ driving candidate matrices selected from the driving candidate matrix set, or are selected by the driving candidate The τ drive candidate matrices obtained by weighting the plurality of drive candidate matrices selected in the matrix set.

 Optionally, the determining unit is located in a baseband domain, and the driving unit is located in an analog domain; and the antenna port is a vertical antenna port.

 According to still another aspect of an embodiment of the present invention, a communication method is provided. The communication method includes the following steps: determining a first driving matrix corresponding to the X antenna ports, where the first driving matrix is composed of T driving candidate matrices obtained according to the driving candidate matrix set, where the X antenna ports are The first driving matrix is formed, the driving candidate matrix set includes S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, wherein P is less than or equal to N, and X is less than N, and the N is The maximum number of antenna ports that the communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is composed of the S driving candidate matrices; the above X, T, S and P are natural numbers;

The signal is sent out.

Optionally, the determining, by the X antenna ports, the first driving matrix includes: according to the N antenna ports The X shield quantity measurement determines the X antenna ports; or, the X antenna ports are determined according to set criteria. Optionally, the determined first driving matrix is semi-statically determined or dynamically determined.

 Optionally, the driving candidate matrix comprises any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices:

,

 Where 4 is the i-th sub-matrix, e [i, , the i, k is a natural number, and τ represents a transpose.

 Optionally, each of the sub-matrices corresponds to one downtilt angle.

 Optionally, determining the first driving matrix corresponding to the X antenna ports, including: selecting the first driving matrix from the second driving matrix by using at least one selection matrix, where the selection matrix includes any one of the following matrixes One, or any of the transposed matrices of the following matrices:

The above ( = 1,...,^ is a matrix of 1 column, the i-th element in the matrix is 1 and the other elements are 0. Optionally, a first driving matrix of each antenna port of the X antenna ports is obtained by multiplying the second driving matrix by the selection matrix.

 Optionally, the signal is amplified before the signal of the X antenna ports is transmitted by the antenna array corresponding to the X antenna ports according to the first driving matrix.

 Optionally, the T driving candidate matrices obtained according to the driving candidate matrix set are T driving candidate matrices selected from the driving candidate matrix set, or are selected by the driving candidate The T drive candidate matrices obtained by weighting the plurality of drive candidate matrices selected in the matrix set.

 Optionally, the antenna port is a vertical antenna port, and a first driving matrix of the X antenna ports is determined in a baseband domain, where the first driving matrix is corresponding to the X antenna ports. An antenna array transmits signals of the X antenna ports.

 According to still another aspect of an embodiment of the present invention, a communication device is provided. The communication device includes: a processing unit, configured to measure a channel shield of the N antenna ports, where N is a maximum number of antenna ports that the communication device can provide, and the N antenna ports are formed by a second driving matrix The second driving matrix is composed according to the S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, where P is less than or equal to N;

 a sending unit, configured to send a channel shield of the N antenna ports;

 a receiving unit, configured to receive data signals of X antenna ports, where the X antenna ports are formed by a first driving matrix, where the first driving matrix is composed of τ driving candidate matrices obtained according to a driving candidate matrix set, The set of driving candidate matrices includes the S driving candidate matrices, X is smaller than N, and the above X, T, S, and P are natural numbers.

 Optionally, the antenna port is a vertical antenna port, and the T driving candidate matrices obtained from the driving candidate matrix set are T driving candidates selected from the driving candidate matrix set. a matrix, or a T drive candidate matrix weighted by a plurality of drive candidate matrices selected from the set of drive candidate matrices.

 According to still another aspect of an embodiment of the present invention, a communication method is provided. The method includes the following steps: measuring a channel shield of N antenna ports, where N is a maximum number of antenna ports that the peer communication device can provide, and the N antenna ports are formed by a second driving matrix, where The two driving matrix is composed of the S driving candidate matrices, each of the driving candidate matrices includes P sub-matrices, wherein P is less than or equal to N; transmitting channel shields of the N antenna ports; receiving Data signals of X antenna ports, the X antenna ports are formed by a first driving matrix, and the first driving matrix is composed of T driving candidate matrices obtained according to a driving candidate matrix set, the driving candidate matrix The set includes the S driving candidate matrices, X is smaller than N, and the above X, T, S, and P are natural numbers.

Optionally, the antenna port is a vertical antenna port, and the T obtained according to the driving candidate matrix set a driving candidate matrix, which is a T driving candidate matrix selected from the driving candidate matrix set, or a T obtained by weighting a plurality of driving candidate matrices selected from the driving candidate matrix set Drive candidate matrix.

 According to still another aspect of an embodiment of the present invention, a communication device is provided. The communication device includes: a processor, configured to determine a first driving matrix corresponding to the X antenna ports, where the first driving matrix is composed of T driving candidate matrices obtained according to the driving candidate matrix set, the X The antenna port is formed by the first driving matrix, the driving candidate matrix set includes S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, where P is less than or equal to N, and X is less than N. The N is a maximum number of antenna ports that the communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is configured according to the S driving candidate matrices; X, T, S, and P are natural numbers; and the driving network entity is configured to send the signals of the X antenna ports by the antenna array corresponding to the X antenna ports.

 According to still another aspect of an embodiment of the present invention, a communication device is provided. The communication device includes: a processor, configured to measure a channel shield of the N antenna ports, where N is a maximum number of antenna ports that the communication device can provide, and the N antenna ports are formed by a second driving matrix The second driving matrix is composed according to the S driving candidate matrices, where each driving candidate matrix includes P sub-matrices, where P is less than or equal to N; and a transmitter is configured to use the N antenna ports a channel shield is sent out; a receiver, configured to receive data signals of X antenna ports, wherein the X antenna ports are formed by a first driving matrix, and the first driving matrix is obtained by τ according to a set of driving candidate matrices The driving candidate matrix set includes the S driving candidate matrices, X is smaller than N, and the above X, T, S, and P are natural numbers.

 In the embodiment of the present invention, by determining the driving matrix corresponding to the antenna port, and transmitting the signal of the antenna port by using the determined driving matrix, the antenna port in the communication device can be flexibly set, thereby improving the communication device pair. The suitability of the scene. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

 1 is a schematic diagram of a two-dimensional beamforming scheme in the prior art;

 2 is a schematic diagram of a three-dimensional beamforming scheme in the prior art;

3 is a schematic diagram of a multi-layer user scenario; 4 is a block diagram of a communication device according to an embodiment of the present invention;

 FIG. 5 is a block diagram of another communication device according to an embodiment of the present invention; FIG.

 6 is a block diagram of still another communication device according to an embodiment of the present invention;

 7 is a block diagram of still another communication device according to an embodiment of the present invention;

 8 is a block diagram of still another communication device according to an embodiment of the present invention;

 9 is a block diagram of a communication method according to an embodiment of the present invention;

 FIG. 10 is a block diagram of a communication device according to an embodiment of the present invention; FIG.

 11 is a block diagram of another communication device according to an embodiment of the present invention;

 Figure 12 is a block diagram of another communication method of an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

 It can be understood that the communication device involved in the embodiments of the present invention includes, but is not limited to, a source radio network controller.

(Source Radio Network Controller, Source RNC) Source Base Station Controller (Source BSC), Source Serving GPRS Support Node (Source SGSN), evolved network base station (evolved universal terrestrial radio) Access network NodeB, eNodeB), and UE (User Equipment).

 Generally, the communication device processes the data to be transmitted through baseband processing such as precoding, and then undergoes inverse Fourier transform, parallel-serial conversion, and digital-to-analog conversion to enter the analog domain, and is converted into a radio frequency signal by up-conversion to be weighted by the driving unit. After processing, the antenna antennas corresponding to the antenna array are transmitted. For convenience of description, the following description will be made by taking a vertical antenna port as an example. Those skilled in the art will appreciate that embodiments of the present invention are equally applicable to horizontal antenna ports.

As shown in FIG. 4, each vertical antenna port signal is weighted by a weighting coefficient of the driving unit to form a fixed vertical beam. Assumed that the communication device uses two antenna ports to the vertical when s ^ ₂ s. The drive matrix ρ' of the drive unit can be expressed as:

Wherein is the driving matrix of the driving unit, Α is a sub-matrix of the first vertical antenna port _{S l} , the A contains n elements, and n is the number of antenna elements in the antenna array corresponding to the first vertical antenna port, The n elements a _l a ₂ , ... a _n are weighting coefficients of the beam forming the first vertical antenna port. The data of the first vertical antenna port s _t is weighted by n weighting coefficients of the sub-matrix A to form a fixed-point directed beam. B is a sub-matrix of the second vertical antenna port s ₂ , where B contains m elements, and m is the number of antenna elements in the antenna array corresponding to the second vertical antenna port, and the m elements bb ₂ , . . . b _m is the weighting coefficient of the beam, and the data of the second vertical antenna port s ₂ is weighted by the m weighting coefficients of the sub-matrix B to form a fixed-pointed beam. The driving unit forms a first beam from the antenna array corresponding to the first vertical antenna port according to the driving matrix, and forms a second beam from the antenna array corresponding to the second vertical antenna port.

If m = n, the sub-matrix A and the sub-matrix B may further have the following form, Β = α Α. Thus, the sub-matrix α 第二 of the second vertical antenna port can be obtained by multiplying the sub-matrix 以 by the complex-valued weighting coefficient α. Where α is the complex-valued weighting coefficient on the second vertical antenna port. Equation (1) can have the following form:

 When α is a special complex value, Α and α Α in the above formula 2) may be combined to form a third vertical antenna port, and the antenna element of the third vertical antenna port is connected to the antenna corresponding to the first vertical antenna port. The antenna elements in the array are composed of antenna elements in the antenna array corresponding to the second vertical antenna port, and are weighted by 2n weighting coefficients of the sub-matrix α and α 形成 to form a fixed-point beam.

 In the multi-layer user distribution scenario shown in FIG. 3, a plurality of users are randomly distributed in layers 1-8. For low-level users, traditional beams, such as 12-degree down-tilt beams, can guarantee the performance of this part of the user. However, this beam does not adequately cover high-level users. To cover high-level users, an additional set of antenna arrays is usually required to form a vertical beam pointing to the upper layer. It should be noted that the two sets of antenna arrays are independently directed to a fixed vertical direction, and the parameters such as the direction, width, and energy of the formed beam cannot be flexibly adjusted. The beams used by each vertical antenna port cannot be exchanged or changed. Therefore, this curing solution cannot be applied to different scenarios, increasing the complexity of product design and the inflexibility of network deployment.

 First embodiment

 According to an embodiment of the present invention, a communication device is provided. The communication device may be located at the base station side, and may specifically be a base station. As shown in FIG. 5, the communication device 500 can include:

a determining unit 503, configured to determine a first driving matrix corresponding to the X antenna ports, where the first driving matrix is composed of one driving candidate matrix obtained according to the driving candidate matrix set, where the X antenna ports are First drive The moving matrix is formed, the driving candidate matrix set includes S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, wherein P is less than or equal to N, X is less than N, and the N is the communication The maximum number of antenna ports that the device can provide. The N antenna ports are formed by a second driving matrix, and the second driving matrix is composed according to the S driving candidate matrices; the X, T, S, and P are natural numbers. ;

 The driving unit 505 is configured to send the signals of the X antenna ports by the antenna array corresponding to the X antenna ports.

 It will be appreciated that for a plurality of vertical antenna ports, the number of vertical antenna ports determined in the prior art is equivalent to the maximum number of antenna ports that the communication device can provide. The vertical antenna port used is fixed and cannot be changed. According to an embodiment of the invention, the first drive matrix determined by the determining unit is composed of T drive candidate matrices. Moreover, the T pieces can be arbitrarily determined in the S drive candidate matrices, and the T drive candidate matrices determined each time may be the same or different. According to an embodiment of the present invention, for a vertical antenna port, the X vertical antenna ports determined by the determining unit are determined from a maximum number N of vertical antenna ports that the communication device can provide, each The X vertical antenna ports determined in the second time may be the same or different.

 In the embodiment of the present invention, by determining the driving matrix corresponding to the antenna port, and transmitting the signal of the antenna port by using the determined driving matrix, the antenna port in the communication device can be flexibly set, thereby improving the communication device pair. The suitability of the scene.

 According to an embodiment of the present invention, the determining unit may determine an antenna port required according to the channel shield measurement result returned by the peer communication node, and determine a driving matrix used by the antenna port. The channel shield measurement result returned by the peer communication node may be separately measured by the peer end based on the N antenna ports. The X antenna ports may be determined according to channel shield measurement results of the N antenna ports, for example, the X antenna ports correspond to the largest X of the N measurement results.

In addition to the channel shield measurement result, the determining unit may determine the required antenna port according to the set criteria. For example, the base station configures a corresponding first driving matrix according to the scenario. In a U Ma scenario where the base station height is greater than the user height, the base station configures a driving matrix corresponding to the downward beam for the user in the cell, for example, the corresponding downtilt angle of the beam is 12°. In a scenario where the base station height is less than a part of the user's height and is greater than another part of the user's height, the base station configures the intra-cell user to have both an upward beam and a downward beam. The first drive matrix, as by the downtilt angle -6. There is also a downtilt angle of 12. The first drive matrix composed. Alternatively, the base station may also configure a corresponding driving matrix according to the user distribution. For example, when the user is only distributed on the ground, the base station configures a downward beam for the user in the cell, and the driving matrix corresponding to the following inclination angle of 12°. The determining unit of the communication device can quickly respond to the scene change by setting the criterion or the channel measurement result, and adaptively adjusting the pair The drive matrix should be adapted to better suit different scene requirements.

 According to an embodiment of the invention, the determined first driving matrix may be semi-statically determined or dynamically determined. The so-called semi-static means that the selected first driving matrix corresponding to the X antenna ports consisting of T driving candidate matrices is fixed for a long period of time, which can be several tens, hundreds of transmissions. The time interval (transmission time interva l , ΤΤΙ ) can also be a few minutes or a few hours. After a period of time, the first drive matrix of the X antenna ports formed by the one drive candidate matrix is re-determined. The so-called dynamic means that the real-time dynamic determines the first driving matrix corresponding to the X antenna ports formed by the driving candidate matrix, and the selection process is dynamically changed in real time. The communication device uses semi-static determination to save signaling overhead without loss of flexibility. The communication device uses real-time or dynamic determination, and the beam can be more flexibly adjusted to adapt to the changing scene.

 According to an embodiment of the invention, the drive candidate matrix comprises any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices:

Where 4 is the i-th sub-matrix, e [i, , the i, k are natural numbers, and τ represents transposition. Each submatrix can form a beam whose downtilt angle is a parameter of the beam. Downtilt angle corresponding to each submatrix Usually not the same, but embodiments of the invention do not exclude the same downtilt. In addition, other parameters such as the width and width of the beam may be the same or different.

 It is assumed that N is the maximum number of antenna ports that the communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is composed according to the S driving candidate matrices. For example, the second driving matrix includes and is not limited to the following forms:

A

 Α

Where Q is a matrix of P rows and N columns. The matrix can be weighted by the drive candidate matrix Q _u , Q: Q _P1

Combined, similar matrices are available. which is

 A

α _λ Α _λ

(5)

 The second driving matrix may further comprise a matrix which is a matrix of P rows and 1 column:

Where i _1; i ₂ , ···, i _P is any value between [l, k], ie A _u , A _ip represents a different submatrix, au, ..., a _ip represents a different complex Value weighting factor. The second drive matrix may also include a transposed matrix of the matrix.

Figure 5 illustrates an embodiment in accordance with the present invention. As illustrated, the determination signal X received base band antenna port is determined by the unit, L _x. The X antenna ports are selected from N antenna ports. The data to be sent is transmitted through the N radio frequency channels corresponding to the N antenna ports, specifically, SS ₂ , S „ into the driving unit. The driving unit drives the weighting coefficients W ₁₄ , . . . according to the first driving matrix. W _r ,

W!, 2, W _r , ₂ , W!, M, ···, W _r , _M , The weighted processing of the above data is used to form different multiple beams, and these beams may have different characteristics. Where r is the most applicable driving weighting factor for each antenna element Number. A _k is the kth downtilt submatrix, and the A _k contains M elements, and M is the number of corresponding antenna elements. The M elements in A _k are the driving weighting coefficients of the kth downtilt angle, and the driving weighting coefficients of the kth downtilt submatrix A _k can be weighted to form a beam directed to the kth downtilt angle.

 The parameters such as the direction, width, and intensity of the vertical beam can be adjusted by adjusting the complex value driving weighting coefficients of different vertical antenna ports. The adjustments herein can be adjusted by the communication device or adjusted based on the signals received by the communication device.

It should be noted that the M corresponding to each downtilt beam in the above embodiment is equal, that is, the number of antenna elements used for each different antenna port is the same, that is, the driving of A _l A ₂ , The number of weighting coefficients is the same. However, it can be understood that the number of antenna elements used in each different antenna port may be different in practice, that is, the number of driving weighting coefficients in Α , ₂ , A _k may be inconsistent. The number of antenna elements corresponding to each vertical antenna port and the number of driving weighting coefficients may be determined according to actual conditions, as long as the beam directed to the kth downtilt angle can be formed by the driving weighting coefficient of the kth downtilt submatrix A _k .

In the scheme of FIG. 5, one antenna element #M multiplexes r drive weighting coefficients WM, W ₂ , _M , ..., W _R , _M . It can be seen that the data corresponding to different vertical antenna ports can be multiplexed on the same antenna. The driving weighting coefficients of the sub-matrices of different downtilt angles corresponding to different vertical antenna ports can be added and used. In other words, the drive matrix corresponding to each vertical antenna port can be weighted by any one or more of the drive candidate matrices. It can be understood that, in the solution of FIG. 5, the vertical antenna port can be replaced with a horizontal antenna port, and the corresponding weighting forms a plurality of horizontal direction beams.

 Determining, according to an embodiment of the present invention, the first driving matrix corresponding to the X antenna ports, comprising: selecting the first driving matrix from the second driving matrix by using at least one selection matrix, where the selection matrix comprises the following matrix Any of the following, or any of the transposed matrices of the following matrices:

(7)

The above ( = 1,...,^ is a matrix of 1 column, the i-th element in the matrix is 1, and the other elements are 0. The N is the maximum number of antenna ports that the communication device can provide.

For example, the driving matrix of the antenna port 2 can multiply the second driving matrix Q and e ₂ to obtain the first driving matrix used by the antenna port 1, and the antenna port according to the weighting coefficient corresponding to the first driving matrix. The signal of 2 is sent out. The above scheme of using the selection matrix to determine the first drive matrix is only one form of selecting the drive matrix. Those skilled in the art will appreciate that the required drive matrix can be clarified as long as the corresponding column or row is indicated in the determined Q. In other words, just know Q and the number you need. The number is the desired column number or line number. According to the technical solution using the selection matrix or the column number or the line number, the determining unit does not need to transmit all the driving matrix or the driving candidate matrix to the driving unit, thereby saving signaling resources. The determining unit can send information including the column number or the line number to the driving unit, making the technical solution easier to implement.

 According to an embodiment of the invention, there may be at least one power amplifier between the driving unit and the antenna, and the power amplifier is used for amplifying the signal corresponding to the antenna port.

 As shown in FIG. 5, the power amplifier may be associated with a power amplifier after the driving unit, that is, an antenna array may be associated with a power amplifier or a power amplifier before the driving unit. After the power amplifier is followed, the technical solution of each power amplifier associated with one power amplifier has lower requirements on the power amplifier, thereby reducing the use cost. Before the power amplifier, the technical solution of each power amplifier associated with one power amplifier has higher requirements on the power amplifier, which will increase the use cost.

 According to an embodiment of the invention, the determining unit may be located in a baseband domain, and the driving unit may be located in an analog domain. Figures 6 and 7 show a more detailed solution. The baseband domain includes a determining unit, the determining unit, receiving the signal of the baseband domain by using the determined X antenna ports, and determining the first driving matrix corresponding to the X antenna ports, and transmitting the determined first driving matrix by using a controller or other means Going to the driving unit, the data to be sent is subjected to inverse Fourier transform, parallel-serial conversion, digital-to-analog conversion, enters the analog domain, and is up-converted into a radio frequency signal, and the driving unit performs the above-mentioned data according to the first driving matrix. After the weighting process, the antenna arrays corresponding to the antenna array are transmitted.

 The communication device shown in Fig. 6 includes a driving unit, a determining unit and an antenna array, and the first type of power amplifier. Wherein, the first type of power amplifier refers to a power amplifier of the power amplifier behind the driving unit. Optionally, Figure 7 shows that the communication device includes a drive unit, a determination unit and an antenna array, and the second power amplifier. The second power amplifier refers to a power amplifier of the power amplifier in front of the driving unit. In order to explain the embodiments of the present invention in more detail, specific technical solutions are exemplified below.

Taking Figure 4 as an example, the communication device uses two sets of antenna arrays. In accordance with an embodiment of the invention, a plurality of drive candidate matrices are provided. Each of the drive candidate matrices includes any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices,

( 8 )

Each of the driving matrices includes two sub-matrices, and the sub-matrix A _{t is} used to form a first beam, for example, the first beam may be directed to the downtilt angle 12. The sub-matrix A _{2 is} used to form the second beam, for example, the second beam can be directed to the downtilt angle -6. .

 It can be seen that the matrix of the following formula (9) can be obtained by one or more weights in the matrix of the above formula (8). According to an embodiment of the present invention, the set of the candidate driving matrix includes, without limitation, the formula (9). The matrix in ). The weighting refers to an operation of multiplying a complex-valued weighting coefficient by the matrix and multiplying the obtained matrix.

Where α, a ₂ , a ₃ , and a ₄ are complex-valued weighting coefficients.

 For example, the first antenna port may be formed by the first antenna port, and the first beam formed by the first antenna port is directed to the downtilt angle

12. . The second antenna port may be formed, and the first beam formed by the second antenna port is directed to the downtilt angle 12. . (3⁄4 may form a third antenna port, and the third beam formed by the third antenna port is directed to a downtilt angle of -6. By assigning a (a) of 3⁄4, (3⁄4 may be used to form a fifth antenna port, The fifth beam formed by the fifth antenna port is directed to the downtilt angle 12. By adjusting the value of the ^, a composite beam can be formed, which is narrower than the first beam, and the combined beam is 12° down by two angles. Beamforming. By assigning a ₂ in the center, Q ₆ can be used to form a sixth antenna port, and the sixth beam formed by the sixth antenna port is directed to the downtilt angle 12. By adjusting the 3⁄4 assignment, it can be formed. A composite beam, which is only narrower than the third beam, is formed by two beams pointing downwards -6. By assigning values to the center, (3⁄4 can be used to form the first A seven antenna port, the seventh antenna port forming a composite beam, the composite beam being directed by a downtilt angle 12. The beam and pointing down the dip-6. Beamforming. The assignment of α ₄ to the center can be used to form a composite beam formed by a beam pointing at a down-tilt angle of -6° and a beam pointing at a down-tilt angle of 12°. Similarly, assignment adjustments can be made for β ₇ and (3⁄4).

 A communication device, such as a base station, can determine the vertical antenna ports actually used, and the sub-matrices and beams corresponding to each of the vertical antenna ports, according to different needs. For example, #^ can be determined based on different scenarios and/or corresponding user distributions.

As shown in FIG. 3, the base station when the height of 10 meters, and the user profile when tall (3 m each storey) of 1-8 layers, the base station may alternatively choose the driving matrix Q ₄ is driven. That is, the corresponding sub-matrix is A ₂ , and correspondingly, the first antenna array forms a first beam directed downward, such as a downward tilt angle of 12 °, and the second antenna array forms a second beam pointing upward, such as a downward tilt angle - 6. . This can cover 5-8 layers of users above the base station height and 1-4 users below the base station height.

Alternatively, the base station may choose to drive according to the drive candidate matrices Q ₃ , Q ₄ , that is, the corresponding sub-matrices are A ₂ and A ₂ , and accordingly, both antenna arrays form an upward tilt angle of -6. The beam can thus cover 5-8 layer users above the base station height. Similarly, a downward beam can be formed, and the base station can choose to drive according to the drive candidate matrix QQ ₂ , that is, the corresponding sub-matrix is Α correspondingly, both antenna arrays form a downward tilt angle of 12. The beam can thus cover 1-4 layers of users below the base station height.

Alternatively, the base station may select to be driven according to the driving candidate matrix Q ₅ , that is, the corresponding sub-matrix is

α, by assigning, A _t and " Α can further form a fifth vertical antenna port, the antenna vertically forming an antenna array corresponding to the antenna port to form the fifth beam having a downward tilt angle of 12. This can be applied to The urban macro (UMa) scene or the scene with only the ground and the first layer users. The height of the base station in the UMa scene is 25 meters, and the users are randomly distributed in the high buildings of 1-8 floors (each floor is 3 m), so the base station height is always greater than the user height, so in this scenario it is possible to use only one downward dip.

As can be seen from the above description, when it is required to point the beam to a lower layer below the height of the base station, the base station can select a corresponding matrix in the A-driven candidate matrix, such as Q _l Q ₂ , Q ₅ , Q ₇ , Q _{8 .} t choose. When it is required to point the beam to a higher layer above the base station height, the base station can select a corresponding matrix in the drive candidate matrix including A ₂ , as can be selected in the Q ₃ , Q ₄ , Q ₆ , Q ₇ , Q ₈ t.

 Through the above description, it can be seen that the embodiment of the present invention can flexibly select and adjust the vertical beam corresponding to multiple vertical antenna ports, so that it can be applied to different scenarios.

For example, the maximum number of vertical antenna ports that the communication device can provide is eight, and the corresponding driver device The selection matrix is Q ll Q ₈ in the above formula (9). P is the number of beam directions that the communication device is capable of providing. The determining unit may be based on the channel shield of the antenna port corresponding to the eight candidate driving matrices fed back by the user, such as Signal Noise Ratio (SNR), Reference Signal Received Power (RSRP), and channel shield. A channel quality indicator (CQI) or the like determines a vertical antenna port, and determines a first driving matrix corresponding to the one vertical antenna port. The determining unit may determine 2 of the 8 vertical antenna ports according to the measurement result using the maximization criterion or according to a certain channel shield threshold. The first driving matrix corresponding to the vertical antenna port mentioned here may be that the two vertical antenna ports respectively correspond to a first driving matrix. It is also possible that the two vertical antenna ports jointly correspond to one first driving matrix, and specifically, the first driving matrix specifically includes some two driving candidate matrices in Q 'j Q ₈ .

Driving the candidate matrix to Q ₈ may constitute a second driving matrix (^. wherein Q _l Q ₂ , the order of Q 8 may vary and may be preset. As an example, Q includes is not limited to the following form:

When multiplying Q by the selection matrix e ₇ , the first drive matrix Q ₇ can be obtained. The selection matrix includes any one of the following matrices, or any one of the transposed matrices of the following matrices:

When ρ is multiplied by _ei , the first driving matrix Q _l can be obtained, that is, the corresponding sub-matrix is 0. When ρ and e ₂ Multiply, the first driving matrix Q ₂ can be obtained, that is, the corresponding sub-matrix is 0 and so on. When ρ is multiplied by 6 ₈ , the first driving matrix Q ₈ can be obtained. So there is the following formula,

0 = ^ ( 12 ) In general, the number of antenna elements used determines the width of the beam they form. For example, the beam width formed by using 8 antenna elements is narrower than that of using 4 antenna elements, and the energy is more concentrated. In a small cell, since its cell radius is small, the coverage is good, so that a drive matrix of a wide beam formed by fewer cells can be used, as can only use the above, Q ₂ , Q ₃ or drive candidate matrix.

 According to another aspect of an embodiment of the present invention, the communication device may obtain more drive candidate matrices by combining weights through a limited drive candidate matrix.

The driving candidate matrix set in the above example may be Q _u , Q ₁₂ , Q ₂₁ and Q ₂₂ in the formula (8), ie, Q ₂ , Q ₃ and Q _{4 of the} formula (9), and may also be adopted by The drive candidate matrix combination weights get more drive candidate matrices.

For example, the maximum number of vertical antenna ports that the communication device can provide can be five. The communication device determining unit determines a first driving matrix of the three vertical antenna ports, the first driving matrix being composed of three driving candidate matrices in the driving candidate matrix set, for example, including three driving candidate matrices. The three vertical antenna ports are formed by the first drive matrix. As described above, the first driving matrix corresponding to the three vertical antenna ports may be a first driving matrix corresponding to each vertical antenna port, which is not illustrated. The set of driving candidate matrices includes the above four candidate driving matrices and the driving candidate matrices obtained by weighting the four candidate driving matrices. Each drive candidate matrix includes 2 sub-matrices. The second driving matrix forms five vertical antenna ports that the communication device can provide, and the second driving matrix is composed of five candidate driving matrices. It is assumed that the corresponding five candidate driving matrices are Qi, Q ₂ , Q ₃ and Q ₄ , respectively, and Q ₅ obtained by weighting. The determining unit may determine three vertical antenna ports and a corresponding first driving matrix according to channel shields of the antenna ports corresponding to the five candidate driving matrices fed back by the user. Driving the candidate matrix to Q ₅ may constitute a second driving matrix ^ where Q _l Q ₂ , Q ₅ may be changed in order and may be pre-set, for example, Q is not limited to the following form:

 Use 3 5 rows and 1 column selection matrix

( 14 )

Multiplied by Q, Q ₂ and Q ₅ included in the first drive matrix can be obtained.

 In the above example, the alternative drive matrix, the first, second drive matrix, and the selection matrix all appear in the form of a matrix of multiple rows and columns. This matrix form is only limited by the limitations of the description matrix and is not intended to limit the core idea of the present invention. It can be understood that those skilled in the art can replace the above matrix with a matrix of single row and multiple columns, and transpose the corresponding other matrix and adaptively adjust the corresponding parameters, and the technical solution of the present invention can still be implemented. Accordingly, such modifications are intended to be included within the scope of the present invention.

 The above is merely an example of a vertical antenna port. It will be appreciated that embodiments of the invention are not limited to vertical antenna ports. Based on the same principle, it can also be applied to horizontal antenna ports. Simply replace the vertical antenna port above with a horizontal antenna port. Embodiments of the present invention are even applicable to other possible three-dimensional antenna port scenarios.

 Second embodiment

According to an embodiment of the present invention, a communication device is provided. As shown in FIG. 8, the communication device 800 includes: a processor 803, configured to determine a first driving matrix of X antenna ports, where the first driving matrix is obtained by driving a candidate matrix set a selection matrix, the X antenna ports are formed by the first driving matrix, the driving candidate matrix set includes S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, wherein, p Less than or equal to _N , X is less than N, the N is the maximum number of antenna ports that the communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is driven according to the S driving The candidate matrix is composed; the above X, T, S, P are natural numbers;

 The driving network entity 805 is configured to send the signals of the X antenna ports by the antenna array corresponding to the X antenna ports.

 In this embodiment, the processor may perform all the functions of the determining unit in the first embodiment, or perform the same steps. The driving network entity may complete all the functions of the driving unit in the first embodiment, or perform the same steps. The connection relationship between the processor and the driving network entity is consistent with the connection relationship between the determining unit and the driving unit of the first embodiment. For the situation in FIG. 6 or 7, the connection relationship between the above processor and other components in the communication device is consistent with the connection relationship between the processing unit and other components in the first embodiment, and the connection relationship between the above-mentioned driving network entity and other components in the communication device The connection relationship between the drive unit and other components in the first embodiment is identical.

 The present embodiment is a device claim similar to that of the first embodiment, and may also include similar antennas, power amplifiers and the like in the first embodiment, and similar effects to those of the first embodiment can be achieved, and details are not described herein.

 Third embodiment

According to an embodiment of the present invention, a communication method is provided. As shown in FIG. 9, the method includes the following steps: 901. Determine a first driving matrix of X antenna ports, where the first driving matrix is composed of T driving candidate matrices obtained according to a driving candidate matrix set, where the X antenna ports are formed by the first driving matrix. The driving candidate matrix set includes S driving candidate matrices, where each driving candidate matrix includes P sub-matrices, where P is less than or equal to N and X is less than N, and the N is capable of providing the communication device. The maximum number of antenna ports, the N antenna ports are formed by a second driving matrix, and the second driving matrix #^ is composed of the S driving candidate matrices; the X, T, S, and P are natural numbers; The signal of the mouth is sent out.

 It can be seen that, in the embodiment of the present invention, by determining the driving matrix corresponding to the antenna port, the antenna port in the communication device can be flexibly set, thereby improving the applicability of the communication device to various scenarios.

 Specifically, in the foregoing step 901, the determining the first driving matrix corresponding to the X antenna ports may include: determining, according to the channel shield measurement result of the N antenna ports, the X antenna ports; or, according to the set criteria To determine the X antenna ports.

 In the above step 901, the determined first driving matrix may be semi-statically determined or dynamically determined.

 In the embodiment of the present invention, according to the T driving candidate matrices obtained in the driving candidate matrix set, the τ driving candidate matrices selected from the driving candidate matrix set, or by the driving T drive candidate matrices obtained by weighting a plurality of selected drive candidate matrices in the candidate matrix set.

 The drive candidate matrix of the embodiment of the present invention may specifically include any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices:

,

 Where 4 is the i-th sub-matrix, e [i, , the i, k is a natural number, and τ represents a transpose. Each of the sub-matrices may correspond to a downtilt angle.

 In the foregoing step 901, determining the first driving matrix corresponding to the X antenna ports may specifically include: selecting the first driving matrix from the second driving matrix by using at least one selection matrix, where the selection matrix includes the following matrix Any of the following, or any of the transposed matrices of the following matrices:

The above ( = 1,...,^ is a matrix of 1 column, the i-th element in the matrix is 1, and the other elements are 0. Accordingly, the first of each antenna port of the X antenna ports The driving matrix is obtained by multiplying the second driving matrix by the selection matrix. The step of multiplying is the same as that performed by the apparatus of the first embodiment, and details are not described herein again.

 The signal may also be amplified before the specific signal transmission is performed in the above step 902. According to an embodiment of the present invention, the antenna port is a vertical antenna port, and a driving matrix of the X antenna ports is determined in a baseband domain, and the X antenna ports are used in the analog domain according to the first driving matrix. A corresponding antenna array transmits signals of the X antenna ports.

 The communication method provided in this embodiment corresponds to the communication device of the first embodiment. The effect of the communication method of this embodiment is the same as that of the communication device of the first embodiment, and will not be described again.

 Fourth embodiment

According to an embodiment of the present invention, a communication device is provided. The communication device can be located on the user side, specifically Is a user device. As shown in FIG. 10, the communication device 1000 includes: a processing unit 1003, configured to measure a channel shield of N antenna ports, where N is a maximum number of antenna ports that the peer communication device can provide, and the N The antenna port is formed by a second driving matrix, and the second driving matrix is composed of the S driving candidate matrices, each of the driving candidate matrices includes P sub-matrices, wherein P is less than or equal to N;

 The sending unit 1005 is configured to send the channel shield of the N antenna ports.

 The receiving unit 1001 is configured to receive data signals of X antenna ports, where the X antenna ports are formed by a first driving matrix, and the first driving matrix is composed of T driving candidate matrices obtained according to a driving candidate matrix set. The driving candidate matrix set includes the S driving candidate matrices, X is smaller than N, and the X, T, S, and P are natural numbers.

 According to an embodiment of the present invention, the antenna port is a vertical antenna port, and the τ driving candidate matrices obtained according to the driving candidate matrix set are T selected from the driving candidate matrix set. Driving the candidate matrix, or T driving candidate matrices obtained by weighting a plurality of driving candidate matrices selected from the set of driving candidate matrices.

 The peer communication device in the embodiment of the present invention may be the communication device described in the foregoing device embodiment, and the peer communication device and the communication device shown in FIG. 10 are included in a wireless communication system. For example, the communication device shown in FIG. 10 may be a UE, and the peer communication device may specifically be a base station.

 In the embodiment of the present invention, the communication device can make the peer communication device faster and more flexible by detecting the channel shield of the antenna port and affecting the process of determining the driver matrix corresponding to the antenna port by the peer communication device. In response to changes in the scene, the applicability of the peer communication device to various scenarios is improved.

 Fifth embodiment

 According to an embodiment of the present invention, a communication device is provided. The communication device can be located on the user side. As shown in FIG. 11, the communication device 1100 includes: a processor 1103, configured to measure a channel shield of N antenna ports, where N is a maximum number of antenna ports that the peer communication device can provide, and the N antennas The port is formed by a second driving matrix, the second driving matrix is composed according to the S driving candidate matrices, each of the driving candidate matrices includes P sub-matrices, wherein P is less than or equal to N;

 a transmitter 1105, configured to send a channel shield of the N antenna ports;

 The receiver 1101 is configured to receive data signals of X antenna ports, where the X antenna ports are formed by a first driving matrix, and the first driving matrix is composed of T driving candidate matrices obtained according to a driving candidate matrix set. The driving candidate matrix set includes the S driving candidate matrices, X is smaller than N, and the X, T, S, and P are natural numbers.

According to an embodiment of the present invention, the antenna port is a vertical antenna port, and the driving candidate matrix set is The T drive candidate matrices obtained from the combination are one of the drive candidate matrix selected from the set of drive candidate matrices, or a plurality of drive candidates selected from the set of drive candidate matrices A matrix of candidate matrixes obtained by weighting the matrix.

 In this embodiment, the processor may perform all the functions of the processing unit in the fourth embodiment, or perform the same steps; the transmitter may complete all functions of the sending unit in the fourth embodiment, or perform the same steps; All the functions of the receiving unit in the fourth embodiment can be completed, or the same steps can be performed. The connection relationship between the processor, the transmitter, and the receiver is the same as the connection relationship between the processing unit, the transmitting unit, and the receiving unit of the fourth embodiment.

 This embodiment is a device claim similar to that of the fourth embodiment, and effects similar to those of the first embodiment can be achieved, and will not be described again.

 Sixth embodiment

 According to an embodiment of the present invention, a communication method is provided. The communication device can be used for a user side device, and specifically can be a user device. As shown in FIG. 12, the communication method includes the following steps:

 1201: Measure a channel shield of the antenna ports, where Ν is a maximum number of antenna ports that the peer communication device can provide, the one antenna ports are formed by a second driving matrix, and the second driving matrix is configured according to S driving candidate matrixes, each of the driving candidate matrices comprising a plurality of sub-matrices, wherein Ρ is less than or equal to Ν;

 1202: Send a channel shield of the one antenna port;

 1203. Receive data signals of X antenna ports, where the X antenna ports are formed by a first driving matrix, where the first driving matrix is composed of one driving candidate matrix obtained according to a driving candidate matrix set, the driving The candidate matrix set includes the S driving candidate matrices, X is smaller than Ν, and the above X, T, S, and P are natural numbers.

 According to an embodiment of the present invention, the antenna port is a vertical antenna port, and the T driving candidate matrices obtained in the driving candidate matrix set are T selected from the driving candidate matrix set. Driving the candidate matrix, or T driving candidate matrices obtained by weighting a plurality of driving candidate matrices selected from the set of driving candidate matrices.

 The communication method provided in this embodiment corresponds to the communication device of the fourth embodiment. The effect of the communication method of this embodiment is the same as that of the communication device of the fourth embodiment, and will not be described again.

Through the description of the above embodiments, it will be apparent to those skilled in the art that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the above functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium. The computer readable medium shield includes a computer storage medium shield and a communication medium shield, wherein the communication medium shield includes a convenient one from one place Transfer any media shield of the computer program to another location. The storage barrier can be any available shield that the computer can access. For example, but not limited to: computer-readable media shields may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data. The desired program code in the form of a structure and any other interface that can be accessed by a computer. Also. Any connection can be appropriately made into a computer-readable shield. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and wave are included in the fixing of the associated shield. As used in the present invention, a disc (Di sk ) and a disc (di sc ) include a compact disc (CD), a laser disc, a disc, a digital versatile disc (DVD), a floppy disc, and a Blu-ray disc, wherein the disc is usually magnetically replicated, The disc uses a laser to optically replicate the data. Combinations of the above should also be included within the scope of the computer-readable shield.

 Although the present invention has been described in detail by reference to the accompanying drawings in the preferred embodiments, the invention is not limited thereto. Various equivalent modifications and alterations to the embodiments of the present invention can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

Rights request

 A communication device, the communication device comprising:

a determining unit, configured to determine a first driving matrix corresponding to the X antenna ports, where the first driving matrix is composed of τ driving candidate matrices obtained by driving the candidate matrix set, where the X antenna ports are The first driving matrix is formed, the driving candidate matrix set includes S driving candidate matrices, and each driving candidate matrix includes P sub-matrices, where p is less than or equal to _N , and X is less than N, and the N is The maximum number of antenna ports that the communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is composed according to the S driving candidate matrices; the above X, T, S, P is a natural number;

 a driving unit, configured to send the signals of the X antenna ports by the antenna array corresponding to the X antenna ports according to the first driving matrix.

 2. The communication device of claim 1 wherein:

 The determining unit is further configured to determine the X antenna ports according to channel shield measurement results of the N antenna ports;

 Or the determining unit is further configured to determine the X antenna ports according to the set criteria.

 3. A communication device according to claim 1 or 2, characterized in that

 The determined first drive matrix is semi-statically determined or dynamically determined.

 4. The communication device according to any one of claims 1 to 3, characterized in that the drive candidate matrix comprises any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices:

 Where 4 is the i-th sub-matrix, e [i, , the i, k is a natural number, and τ represents a transpose.

The communication device according to any one of claims 1 to 4, wherein each of the sub-matrices corresponds to a downtilt angle.

 The communication device according to any one of claims 1 to 5, wherein the determining unit is configured to determine

The first driving matrix corresponding to the X antenna ports includes:

 And selecting, by the at least one selection matrix, the first driving matrix from the second driving matrix, the selection matrix comprising any one of the following matrixes, or any one of transposed matrices including the following matrix:

The above ( = 1,...,^ is a matrix of N rows and 1 column, the i-th element in the matrix is 1 and the other elements are 0.

 The communication device according to any one of claims 1 to 6, wherein the first driving matrix corresponding to the X antenna ports is obtained by multiplying the second driving matrix by the selection matrix.

 The communication device according to any one of claims 1-7, further comprising:

 An antenna, including the antenna array for transmitting the signal;

 At least one power amplifier, the power amplifier being located between the driving unit and the antenna for amplifying the signal.

 9. The communication device according to any one of claims 1-8, wherein said T drive candidate matrices obtained according to a set of driving candidate matrices,

 T drive candidate matrices selected from the set of drive candidate matrices, or

 And T driving candidate matrices obtained by weighting a plurality of driving candidate matrices selected from the set of driving candidate matrices.

10. The communication device according to any one of claims 1-9, wherein the determining unit is located in a baseband domain, and the driving unit is located in an analog domain; And/or, the antenna port is a vertical antenna port.

 A communication method, comprising the steps of:

 Determining a first driving matrix corresponding to the X antenna ports, where the first driving matrix is composed of T driving candidate matrices obtained according to the driving candidate matrix set, wherein the X antenna ports are formed by the first driving matrix, The driving candidate matrix set includes S driving candidate matrices, where each driving candidate matrix includes P sub-matrices, where P is less than or equal to N and X is less than N, and the N is a capability that the communication device can provide. a maximum number of antenna ports, the N antenna ports are formed by a second driving matrix, and the second driving matrix is composed of the S driving candidate matrices; the X, T, S, and P are natural numbers; Send it out.

 The communication method according to claim 11, wherein the determining the first driving matrix corresponding to the X antenna ports comprises:

 Determining the X antenna ports according to channel shield measurement results of the N antenna ports;

 Or, determining the X antenna ports according to the set criteria.

 A communication method according to claim 11, wherein

 The determined first drive matrix is semi-statically determined or dynamically determined.

 14. The communication method according to any one of claims 1 1 to 3, wherein the drive candidate matrix comprises any one of the following matrices, or any one of the matrices obtained by weighting one or more of the following matrices. :

,

Where 4 is the i-th sub-matrix, e [i, , the i, k is a natural number, and τ represents a transpose.

 The communication method according to any one of claims 11-14, wherein each of the sub-matrices corresponds to a downtilt angle.

 The communication method according to any one of claims 11 to 15, wherein determining the first driving matrix corresponding to the X antenna ports comprises:

 The first driving matrix is selected from the second driving matrix using at least one selection matrix, the selection matrix comprising any one of the following matrices, or any one of transposed matrices comprising the following matrices:

The above ( = 1,...,^ is a matrix of N rows and 1 column, the i-th element in the matrix is 1 and the other elements are 0.

 The communication method according to any one of claims 11-16, wherein a first driving matrix of each antenna port of the X antenna ports is obtained by multiplying the second driving matrix by the selection matrix.

 The communication method according to any one of claims 11-17, wherein before the signals of the X antenna ports are transmitted by the antenna array corresponding to the X antenna ports according to the first driving matrix, The signal is amplified.

 The communication method according to any one of claims 11 to 18, wherein the T driving candidate matrices obtained from the driving candidate matrix set are

 T drive candidate matrices selected from the set of drive candidate matrices, or

 And T driving candidate matrices obtained by weighting a plurality of driving candidate matrices selected from the set of driving candidate matrices.

 20. A method according to any one of claims 11-19, characterized in that

 The antenna port is a vertical antenna port,

 Determining a first driving matrix of the X antenna ports in a baseband domain,

In the analog domain according to the first The signal from the line port is sent out.

 21. A communication device, the communication device comprising:

 a processing unit, configured to measure a channel shield of the N antenna ports, where N is a maximum number of antenna ports that the peer communication device can provide, and the N antenna ports are formed by a second driving matrix, the second driving The matrix is composed of the S driving candidate matrices, each of the driving candidate matrices includes P sub-matrices, where P is less than or equal to N;

 a sending unit, configured to send a channel shield of the N antenna ports;

 a receiving unit, configured to receive data signals of X antenna ports, where the X antenna ports are formed by a first driving matrix, where the first driving matrix is composed of T driving candidate matrices obtained according to a driving candidate matrix set, The set of driving candidate matrices includes the S driving candidate matrices, X is smaller than N, and the above X, T, S, and P are natural numbers.

 22. The communication device of claim 21, wherein

 The antenna port is a vertical antenna port, and/or

 According to the T driving candidate matrices obtained in the driving candidate matrix set,

 T drive candidate matrices selected from the set of drive candidate matrices, or

 And T driving candidate matrices obtained by weighting a plurality of driving candidate matrices selected from the set of driving candidate matrices.

 2 3. A communication method, which is characterized in that it comprises the following steps:

 Measuring a channel shield of the N antenna ports, where N is a maximum number of antenna ports that the peer communication device can provide, the N antenna ports are formed by a second driving matrix, and the second driving matrix is according to the S Each of the driving candidate matrices comprises P sub-matrices, wherein P is less than or equal to N;

 Transmitting the channel shield of the N antenna ports;

 Receiving data signals of X antenna ports, wherein the X antenna ports are formed by a first driving matrix, and the first driving matrix is composed of T driving candidate matrices obtained according to a driving candidate matrix set, the driving candidate The matrix set includes the S driving candidate matrices, X is smaller than N, and the above X, T, S, and P are natural numbers.

 24. The method of claim 23, wherein

 The antenna port is a vertical antenna port,

 According to the T driving candidate matrices obtained in the driving candidate matrix set,

 T drive candidate matrices selected from the set of drive candidate matrices, or

 And T driving candidate matrices obtained by weighting a plurality of driving candidate matrices selected from the set of driving candidate matrices.