WO2014166229A1

WO2014166229A1 - Passive intermodulation position detection method and device

Info

Publication number: WO2014166229A1
Application number: PCT/CN2013/085901
Authority: WO
Inventors: 郑翠翠; 马兴望
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-04-09
Filing date: 2013-10-24
Publication date: 2014-10-16
Also published as: CN104104455B; CN104104455A

Abstract

Disclosed are a passive intermodulation position detection method and device. The method comprises: transmitting a passive intermodulation test signal and collecting a passive intermodulation signal; and, determining a correlation between the size of a passive intermodulation and the position thereof on the basis of a time relation between the passive intermodulation signal and the passive intermodulation test signal. By means of the technical solution of the present invention, fault maintenance and detection costs are reduced, the speed of delivery is increased, the efficiency of fault diagnosis is increased, self-diagnose function of the device is implemented, and network quality and customer satisfaction are increased.

Description

TECHNICAL FIELD The present invention relates to the field of mobile communications, and in particular, to a passive intermodulation position detection method and apparatus. BACKGROUND In a wireless communication system, a situation in which a reception noise is raised and a reception performance is degraded often occurs, and a large part thereof is due to a poor passive intermodulation index of the antenna feeder system, and an intermodulation product of the transmission signal. It just falls into the receiving signal band, causing the receiving noise to rise, affecting the receiving index, which leads to the deterioration of the Key Performance Indicator (KPI) of the wireless network, such as the shrinkage of the coverage, the increase of the call drop rate, Switching success rate reduction, etc., ultimately affects network quality, triggers customer complaints, and seriously affects customer satisfaction. The problems of the antenna feeder system are often difficult to find and locate. Even if it is found, the later solution will cost a lot of manpower and material resources and increase the engineering and maintenance costs. Therefore, it is necessary to discover, locate, and solve the above problems during the engineering phase to reduce engineering costs, increase delivery speed, and improve network quality and customer satisfaction. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and a device for detecting a passive intermodulation position, so as to solve the problem that the location of the passive intermodulation signal in the prior art is not easy to find and locate when the passive intermodulation of the feeder or device is not good. . An embodiment of the present invention provides a passive intermodulation position detection method, including: transmitting a passive intermodulation test signal, and acquiring a passive intermodulation signal; and according to a time relationship between the passive intermodulation signal and the passive intermodulation test signal, Determine the correspondence between the size of the passive intermodulation and the location. Preferably, before the transmitting the passive intermodulation test signal, the method further includes: setting a signal transmission frequency and a signal receiving frequency. Preferably, determining the correspondence between the size of the passive intermodulation and the location according to the time relationship between the passive intermodulation signal and the passive intermodulation test signal includes: determining the passive intermodulation signal relative to the passive intermodulation test a first time function of the signal and determining the size of the passive intermodulation; determining the passive intermodulation signal from the passive in the antenna feeder system based on the transmit link delay value, the receive link delay value, and the first time function a second time function of the intermodulation point to the base station port; determining a position correlation function of the passive intermodulation signal according to the second time function and the signal propagation speed, and determining the passive intermodulation according to the position correlation function and the size of the passive intermodulation The size of the corresponding relationship with the location. Preferably, setting the signal transmission frequency and the signal receiving frequency specifically includes: determining, according to a start and stop frequency of the base station, an intersection of the M-th order intermodulation start-stop frequency of the base station and the receiving frequency of the base station, where M is a positive integer; setting the signal transmission frequency to The starting and stopping frequency of the base station; setting the signal receiving frequency to the frequency of the M-order intermodulation signal, wherein the frequency of the M-order intermodulation signal falls within the receiving frequency range of the base station. Preferably, determining a first time function of the passive intermodulation signal relative to the passive intermodulation test signal, and determining the size of the passive intermodulation specifically includes: the passive intermodulation signal X (n) and the passive intermodulation test The signal Y (n) is correlated to determine the time correlation function of the passive intermodulation signal X (n) and the passive intermodulation test signal Y (n)

N-M

C(m) = X{n).conj{Y{n + m))

"=. , where m = 0...Ml, j is a convolution calculation; a plurality of correlation peaks C (K) are obtained according to a time correlation function, wherein each correlation peak and corresponding intermodulation of different positions, Passive mutual

AM, = Y(")|

Adjust the total amplitude of the test signal Υ (η). Determining the passive intermodulation size n ^AM ^ corresponding to the correlation peak C (Κ), where κ is the number of points corresponding to the correlation peak C (Κ); determining the passive mutual according to the time correlation function

C(t) = K* The first time function of the signal X (n) relative to the passive intermodulation test signal Y (n), where f _s is the sampling rate. Preferably, determining, according to the transmit link delay value, the receive link delay value, and the first time function, determining a second time function of the passive intermodulation signal from the passive intermodulation point to the base station port of the antenna feeder system specifically includes : a second time function according to the transmit link delay value, the receive link delay value, and the first time source intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port

Where t is the passive intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port round trip time, k is the passive intermodulation size calibration value, ^ is the delay of the base station calibrated transmit link before shipment The value is the delay value of the receiving link that is calibrated before the base station is shipped. Preferably, the position correlation function of the passive intermodulation signal is determined according to the second time function and the signal propagation speed, and the correspondence between the size of the passive intermodulation and the location is determined according to the position correlation function and the size of the passive intermodulation The relationship specifically includes: determining a position correlation function of the passive intermodulation signal according to the second time function and the signal propagation speed (ί) = _ν χ ^) = _ν χ ^), where V is the signal propagation speed, and _Vf is the cable Relative propagation Number, c is the speed of light; according to the correlation peak C ( K) corresponding to the passive intermodulation size

And the position correlation function ^P(d) = ^VXP(t) = ^v f ^c determines the correspondence between the size of the passive intermodulation and the position. The embodiment of the invention further provides a source intermodulation position detecting device, comprising: a transmitting acquisition module, configured to transmit a passive intermodulation test signal, and collect a passive intermodulation signal; and the processing module is set to be based on passive intermodulation The time relationship between the signal and the passive intermodulation test signal determines the correspondence between the size of the passive intermodulation and the location. Preferably, the above apparatus further comprises: a setting module configured to set a signal transmission frequency and a signal receiving frequency. Preferably, the processing module specifically includes: a first time determining module, configured to determine a first time function of the passive intermodulation signal relative to the passive intermodulation test signal, and calculate a size of the passive intermodulation; a module, configured to determine a second time function of the passive intermodulation signal from the passive intermodulation point to the base station port according to the transmit link delay value, the receive link delay value, and the first time function; a position determining module, configured to determine a position correlation function of the passive intermodulation signal according to the second time function and the signal propagation speed, and determine the size and location of the passive intermodulation according to the position correlation function and the size of the passive intermodulation The correspondence of locations. Preferably, the setting module is specifically configured to: determine, according to a start and stop frequency of the base station, an intersection of the M-order intermodulation start-stop frequency of the base station and the receiving frequency of the base station, where M is a positive integer; setting the signal transmission frequency to the start-stop frequency of the base station Setting the signal receiving frequency to the frequency of the M-order intermodulation signal, wherein the frequency of the M-order intermodulation signal falls within the receiving frequency range of the base station. Preferably, the first time determining module is specifically configured to: perform correlation processing on the passive intermodulation signal X(n) and the passive intermodulation test signal Y(n) to determine the passive intermodulation signal X(n) and none. Source intermodulation test signal Y ( n)

N ■ -M

C(m) = ^ X{n).conj{Y{n + m))

The time correlation function "=. , where m = 0...Ml, j is a convolution calculation; a plurality of correlation peaks C (K) are obtained according to a time correlation function, wherein each correlation peak and corresponding corresponding position are absent Source mutual

AM, = Y(")|

Tune, according to the total amplitude of the passive intermodulation test signal Υ ( η). Determine the correlation peak C ( Κ) corresponding

_Α _ 1^)1

Passive intermodulation size ^{n AM} , where K is the number of points corresponding to the correlation peak C ( K); determining the passive intermodulation signal X ( n ) relative to the passive intermodulation test signal Y ( n ) according to the time correlation function First time function

C(t) = K *丄

, where f _s is the sampling rate. Preferably, the second time determining module is specifically configured to: according to the transmit link delay value, the receive link delay value, and the first time source intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port Two time function

Where t is the passive intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port round trip time, k is the passive intermodulation size calibration value, and _τι is the delay of the base station calibrated transmission link before leaving the factory The value, delay τ ₂ is the delay value of the receiving link that is calibrated before the base station leaves the factory. Preferably, the location determining module is specifically configured to: determine, according to the second time function, and the signal propagation speed, a position correlation function of the passive intermodulation signal ^) : ¹ ^ ^ ^^ ^, where V is the signal propagation speed,

_A _ v _f is the relative propagation constant of the cable, c is the speed of light; the passive intermodulation is determined according to the passive intermodulation size ⁿ sum position correlation function of the correlation peak C(K)^^:^ ^^ ^^ ^ ^^ The size of the corresponding relationship with the location. The beneficial effects of the embodiments of the present invention are as follows: By obtaining the strength and position of the passive intermodulation between the base station device and the antenna feeder system, and analyzing the position of the breakpoint or the fault point of the cable, the passive intermodulation in the prior art is solved. When the signal is detected, the position where the feeder or the device is not properly passively adjusted is not easy to find and locate. It can find and locate the problem in the engineering stage, reduce the cost of fault maintenance and detection, improve the delivery speed, improve the efficiency of fault diagnosis, and realize the equipment. Self-diagnostics to improve network quality and customer satisfaction. The above description is only an overview of the technical solutions of the embodiments of the present invention, and the technical means of the embodiments of the present invention can be more clearly understood, and can be implemented according to the contents of the specification, and the above and other objects, features and embodiments of the embodiments of the present invention are Advantages will be more apparent and obvious, and specific embodiments of the invention are set forth below. BRIEF DESCRIPTION OF THE DRAWINGS Various other advantages and benefits will become apparent to those skilled in the art from this description. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for detecting a passive intermodulation position according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a connection between a passive intermodulation position detecting device and an external device according to an embodiment of the present invention; A schematic diagram of an apparatus used in an example of a passive intermodulation position detection method; 4 is a graph showing the magnitude of passive intermodulation and its corresponding distance according to an embodiment of the present invention; and FIG. 5 is a schematic structural diagram of a passive intermodulation position detecting apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood, and the scope of the disclosure may be fully disclosed to those skilled in the art. In order to solve the problem that the location of the passive intermodulation signal in the prior art is not easy to find and locate the passive intermodulation of the feeder or the device, the embodiment of the present invention provides a passive intermodulation position detection method and device. The technical solution of the embodiment of the present invention can detect the fault location of the base station transmitting system to the antenna feeder cable, greatly reduce the cost, improve the fault diagnosis efficiency, and realize the self-diagnosis function of the device. And the examples, the present invention will be further described in detail. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Method Embodiments According to an embodiment of the present invention, a passive intermodulation position detecting method is provided. FIG. 1 is a flowchart of a passive intermodulation position detecting method according to an embodiment of the present invention. As shown in FIG. 1, the present invention is implemented. The method for detecting a passive intermodulation position includes the following steps: Step 101: Transmitting a passive intermodulation test signal and acquiring a passive intermodulation signal; Before performing step 101, setting a signal transmission frequency and a signal reception frequency. In step 101, setting the signal transmission frequency and the signal receiving frequency specifically includes:

1. According to the starting and ending frequency of the base station, determining that there is an intersection between the starting and ending frequency of the M-th order intermodulation of the base station and the receiving frequency of the base station, where M is a positive integer;

2. Set the signal transmission frequency to the start and stop frequency of the base station;

3. Set the signal receiving frequency to the frequency of the M-order intermodulation signal, wherein the frequency of the M-order intermodulation signal falls within the receiving frequency range of the base station. Step 102: Determine a correspondence between the size of the passive intermodulation and the location according to the time relationship between the passive intermodulation signal and the passive intermodulation test signal. Step 102 includes the following steps: Step 1021: Determine a first time function of the passive intermodulation signal relative to the passive intermodulation test signal, and determine a size of the passive intermodulation; specifically, the collected passive intermodulation signal Correlation processing is performed on the transmitted signal to obtain a first time function of the passive intermodulation signal relative to the passive intermodulation test signal; the following processing is specifically performed:

1. Correlation processing of the passive intermodulation signal X (n) and the passive intermodulation test signal Y (n) to determine the passive intermodulation signal X ( n ) and the passive intermodulation test signal Y ( n ) Time correlation function

N-M

C(m) = ^ X(n).conj'(Y(n ^ m)) , where m=0...M-l, j is a convolution determination;

2. Obtain a plurality of correlation peaks C ( K) according to a time correlation function, wherein each correlation peak and corresponding intermodulation passive intermodulation, according to the total amplitude of the passive intermodulation test signal Y (n) AM = £ | Y )|determine the correlation peak C n-0

(K) Corresponding passive intermodulation size A„=^3⁄4l, where K is the number of points corresponding to the correlation peak C ( K);

ΑΜ 3. Determine the first time function C(t) = K * r of the passive intermodulation signal X (η) relative to the passive intermodulation test signal Υ (η) according to the time correlation function, where f _s is the sampling rate . Step 1022: Determine a second time function of the passive intermodulation signal from the passive intermodulation point to the base station port according to the transmit link delay value, the receive link delay value, and the first time function; The second time function of the passive intermodulation signal from the passive intermodulation point to the base station port is obtained by compensating the delay of the transmitting link and the receiving link. Step 1022 specifically includes: processing, according to a transmit link delay value, a receive link delay value, and a first time, obtaining a passive intermodulation signal in a second time from the passive intermodulation point to the base station port of the antenna feeder system function

, where t is a passive intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port Round trip time, k is the value of the passive intermodulation size calibration, and _τΐ is the delay value of the transmit link calibrated before the base station _leaves the factory, and is delayed to the received link delay value calibrated by the base station. Step 1023: Determine a position correlation function of the passive intermodulation signal according to the second time function and the signal propagation speed, and determine a correspondence between the size of the passive intermodulation and the location according to the position correlation function and the size of the passive intermodulation . Preferably, the position correlation function of the passive intermodulation signal is obtained according to the relationship between the second time function of the passive intermodulation signal and the signal propagation speed. Step 1023 specifically includes the following processing:

1. According to the second time function and the signal propagation speed, determine the position correlation function of the passive intermodulation signal P(d) = v P(t) = v _f c P(t) ^ where V is the signal propagation speed, _Vf For the relative propagation constant of the cable, _c is the speed of light;

2. According to the correlation peak C ( K ) corresponding to the passive intermodulation size A „ and position correlation function

^P(d) = ^VXP(t) = ^v f ^xcx , which determines the correspondence between the size of the passive intermodulation and the location. The above method of the embodiment of the present invention is described in detail below by taking a base station in the 850M frequency band as an example. 2 is a schematic diagram showing the connection of a passive intermodulation position detecting device and an external device according to an embodiment of the present invention. The scenario in which the base station system is actually used is shown in the figure. In the external field, the antenna feeder system is commonly used in multiple base stations. Therefore, in the embodiment of the present invention, not only the single transceiver port but also the antenna feeder system is used independently. The scenario also considers the scenario where multiple transceiver ports share the antenna feed. For scenarios where multiple transceiver ports share the antenna feed, not only the passive intermodulation generated by the port but also the multi-level intermodulation generated by any two ports is calculated. 3 is a schematic diagram of an apparatus used in a passive intermodulation position detecting method of an example of the present invention. Figure 3 is a preferred configuration in which the control unit implements the interaction between the background and the base station system, and the interaction between the computer and the base station system. The data transmission, receiving unit, transmits the required test signal by the logic unit of the base station system, and collects the passive intermodulation signal, and calculates the size. The signal processing unit is completed by the DSP chip of the base station system, and can perform signal correlation calculation and passive intermodulation position calculation. The detailed processing flow of the passive intermodulation position detecting method of the example of the present invention is described in detail below, and specifically includes the following processing: Step 1. Calculate the M-th order intermodulation information according to the start and stop frequency information [F1, F2] of the base station, for example, 3rd order intermodulation, [2*F1-F2, 2F2-F1], 5th order intermodulation [3] *F1-2F2, 3*F2-2*F1] and more order intermodulation, whether there is an intersection with the receiving frequency, and according to the calculation result, select the order to be calculated. In this example, taking the base station of the 850M frequency band as an example, the start and stop frequencies of the 850M base station are 869MHz and 894MHz, and the start and stop frequencies of the reception are 824MHz and 849MHz. We calculate the start and stop frequencies of the 3rd order intermodulation to be 844MHz and 919MHz. The intermodulation will fall into the receiving frequency range; Step 2, set the transmitting signal frequency to 869M and 894M, the power is 43dBm respectively; Step 3, set the frequency of the receiving signal to the frequency of the M-order intermodulation signal. In this example, the frequency of the receiving unit is set to be the frequency of the third-order intermodulation signal of 844 MHz; in step 4, the transmitting and receiving signals of the test signal are sequentially collected; Step 5, the passive intermodulation processing unit will collect and receive the received signal. The passive intermodulation signal X (n) and the transmitted test signal Y ( n ) are correlated to obtain a time correlation function of the two signals, ie

C(m) + m))\ , m=0...Ml, multiple correlation peaks C ( K) can be obtained by correlation function

Passive intermodulation of each correlation peak and corresponding different locations. Assuming AM = ;|Y(«)|, the relative intermodulation of the correlation peak C ( K) to n-0 is A„ = ^J, and the number of points corresponding to the correlation peak C ( K) is K;

ΑΜ Step 6, assuming a sampling rate of / _s , so that the time function C(t) = K * of the passive intermodulation signal relative to the transmitted signal can be obtained.

Number ^f ", step 7, the base station separately calibrates the delay value τ1 of the transmitting link and the delay τ2 of the receiving link,

P( _t ) _{= C} { ^t ~ ^Tx ~ ^Tl ) * k can obtain the time function 2 of the passive intermodulation point of the antenna feeder system to the base station port, _k is the value of the passive intermodulation size calibration; Step 8, according to the signal propagation The speed and time can be used to find the distance of its propagation, P(d) = v P(t) = v _f c P(t) ^ where _vf is the relative propagation constant of the cable, _c is the speed of light, and Figure 4 is the invention. The graph of the size of the passive intermodulation and its corresponding distance in the embodiment, as shown in FIG. 4, can calculate the size of the passive intermodulation and the corresponding distance. In summary, with the technical solution of the embodiment of the present invention, the strength and position of the passive intermodulation between the base station device and the antenna feeder system are obtained, and then the breakpoint or the fault point position of the cable is analyzed, and the current solution is solved. In the technology, the problem that the passive intermodulation signal detection is not easy to find and locate the passive intermodulation of the feeder or the device can find and locate the problem in the engineering stage, reduce the cost of fault maintenance and detection, improve the delivery speed, and improve Fault diagnosis efficiency, realize self-diagnosis function of equipment, improve network quality and customer satisfaction. Apparatus Embodiment According to an embodiment of the present invention, a passive intermodulation position detecting apparatus is provided, and FIG. 5 is a schematic structural diagram of a passive intermodulation position detecting apparatus according to an embodiment of the present invention, as shown in FIG. 5, according to the present invention. The passive intermodulation position detecting device of the embodiment includes: a transmitting and collecting module 50, and a processing module 52. Hereinafter, each module of the embodiment of the present invention is described in detail. The transmitting and collecting module 50 is configured to transmit a passive intermodulation test signal and collect a passive intermodulation signal. The processing module 52 is configured to determine a passive mutual according to a time relationship between the passive intermodulation signal and the passive intermodulation test signal. The correspondence between the size of the tone and the location. Preferably, in the embodiment of the present invention, the method further includes: a setting module, configured to set a signal transmission frequency and a signal receiving frequency before the transmitting and collecting module 50 transmits the passive intermodulation test signal; and the setting module is specifically configured to: The starting and ending frequency of the transmitting station determines that there is an intersection between the starting and ending frequency of the M-th order intermodulation of the base station and the receiving frequency of the base station, where M is a positive integer; setting the signal transmitting frequency to the starting and ending frequency of the base station; setting the signal receiving frequency to the M-order intermodulation signal The frequency of the M-order intermodulation signal falls within the receiving frequency range of the base station. The processing module 52 specifically includes: a first time determining module, configured to determine a first time function of the passive intermodulation signal relative to the passive intermodulation test signal, and determine a size of the passive intermodulation; Set to - correlate the passive intermodulation signal X (n) with the passive intermodulation test signal Y (n) to determine the passive intermodulation signal X ( n ) and the passive intermodulation test signal Y ( n ) Time dependent function

N-M

C(m) = Y^ X n).conj Y n + m)) , where m=0...Ml ,, j is the convolution determination; Obtaining a plurality of correlation peaks C (κ) according to a time correlation function, wherein each correlation peak and corresponding different positions

AM , = Y(")|

Passive intermodulation, based on the total amplitude of the passive intermodulation test signal Υ (η) -0 determines the correlation peak C ( Κ)

_Α _

Corresponding passive intermodulation size " ^AM total, where K is the number of points corresponding to the correlation peak C (K); determining the passive intermodulation signal X (n) relative to the passive intermodulation test signal Y (n) according to the time correlation function The first time function C(t) = K*, where f _s is the sampling rate. The second time determining module is set to be based on the transmit link delay value, the receive link delay value, and the first time function Determining a second time function of the passive intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port; the second time determining module is specifically set to - according to the transmission link delay value, the receiving link delay value, And a first time function to determine a passive intermodulation signal

( _t ) _{= C} ( ^t ~ ' ~ ^Tl ) * k The second time function 2 of the antenna feeder system from the passive intermodulation point to the base station port, where _t is the passive intermodulation signal in the antenna feeder system from the passive The intermodulation point to the base station port round trip time, k is the passive intermodulation size calibration value, ^ is the delay value of the transmitting link calibrated before the base station leaves the factory, and is delayed to the delay value of the receiving link calibrated before the base station leaves the factory. a position determining module, configured to determine a position correlation function of the passive intermodulation signal according to the second time function and the signal propagation speed, and determine the size and location of the passive intermodulation according to the position correlation function and the size of the passive intermodulation The correspondence of locations. The position determining module is specifically configured to: determine a position correlation function of the passive intermodulation signal according to the second time function and the signal propagation speed P(d) = v P(t) = v _f c P(t) ^ where V For the signal propagation speed, _Vf is the relative propagation constant of the cable, and _c is the speed of light;

_A =

Passive intermodulation size ^η ^ ^对应 and position correlation function corresponding to correlation peak c ( κ )

^P{d) = ^VXP(t) = ^v / ^{xex P} W Determines the correspondence between the size of the passive intermodulation and the location. 2 is a schematic diagram showing the connection of a passive intermodulation position detecting device and an external device according to an embodiment of the present invention. The scenario in which the base station system is actually used is shown in the figure. In the external field, the antenna feeder system is commonly used in multiple base stations. Therefore, in the embodiment of the present invention, not only the single transceiver port but also the antenna feeder system is used independently. The scenario also considers the scenario where multiple transceiver ports share the antenna feed. For scenarios where multiple transceiver ports share the antenna, it is necessary to consider not only the passive intermodulation generated by the port but also the multi-level intermodulation generated by any two ports. It should be noted that, in addition to the foregoing setting module, the transmitting and collecting module 50, the first time calculating module, the second time calculating module, and the position calculating module, the embodiment of the present invention may also be divided according to the structure shown in FIG. The control unit of Figure 3 implements the interaction between the background and base station systems, as well as the interaction between the computer and the base station system. The data transmission, receiving unit, transmits the required test signal by the logic unit of the base station system, and collects the passive intermodulation signal, and calculates the size. The signal processing unit is completed by the DSP chip of the base station system, and can perform signal correlation calculation and passive intermodulation position calculation. In summary, with the technical solution of the embodiment of the present invention, the strength and position of the passive intermodulation between the base station device and the antenna feeder system are obtained, and then the breakpoint or the fault point position of the cable is analyzed, and the prior art is solved. In the detection of passive intermodulation signals, it is difficult to find and locate the position where the feeder or equipment passive intermodulation is not good. It can find and locate problems in the engineering stage, reduce the cost of fault maintenance and detection, improve the delivery speed, and improve the fault diagnosis. Efficiency, realize the self-diagnosis function of the device, improve network quality and customer satisfaction. The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general purpose systems can also be used with the teaching based on the teachings herein. From the above description, the structure required to construct such a system is obvious. Moreover, embodiments of the invention are not directed to any particular programming language. It is to be understood that the description of the embodiments of the invention herein described herein may be Numerous specific details are set forth in the description provided herein. However, it is understood that the embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of the description. Similarly, the various features of the present invention are sometimes grouped together into a single embodiment, in the above description of the exemplary embodiments of the invention, Figure, or a description of it. However, the method disclosed is not to be interpreted as reflecting the intention that the claimed invention requires more features than those recited in the claims. Rather, as reflected in the following claims, the inventive aspects reside in fewer than the single implementation disclosed above. All the features of the example. Therefore, the claims following the specific embodiments are hereby explicitly incorporated into the specific embodiments, and each of the claims as a separate embodiment of the invention. Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components. In addition to such features and/or at least some of the processes or units being mutually exclusive, any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined. Each feature disclosed in the specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent, or similar purpose, unless otherwise stated. In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features that are not included in other embodiments, and other features, combinations of features of different embodiments are intended to be within the scope of the present invention. Different embodiments are formed and formed. For example, in the following claims, any one of the claimed embodiments can be used in any combination. The various component embodiments of the present invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or digital signal processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components of the passive intermodulation position detecting device in accordance with embodiments of the present invention. . The invention can also be implemented as a device or device program (e.g., a computer program and a computer program product) for performing some or all of the methods described herein. Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form. It is to be noted that the above-described embodiments are illustrative of the invention and are not intended to limit the scope of the invention, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as a limitation. The word "comprising" does not exclude the presence of the elements or the steps in the claims. The word "a" or "an" preceding the <RTIgt; Embodiments of the invention may be implemented by means of hardware comprising several distinct elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by the same hardware item. The use of the words first, second, and third does not indicate any order. These words can be interpreted as names. INDUSTRIAL APPLICABILITY The technical solution provided by the embodiments of the present invention can be applied to the field of wireless communication systems, and solves the problem that the location of the passive intermodulation signal in the prior art is not easy to find and locate when the passive intermodulation of the feeder or device is not good. It can find and locate problems in the engineering stage, reduce the cost of fault maintenance and detection, improve the delivery speed, improve the efficiency of fault diagnosis, realize the self-diagnosis function of the equipment, and improve the network quality and customer satisfaction.

Claims

Claims, a passive intermodulation position detection method, including:

Transmitting a passive intermodulation test signal and acquiring a passive intermodulation signal;

And determining a correspondence between the size of the passive intermodulation and the location according to the time relationship between the passive intermodulation signal and the passive intermodulation test signal. The method of claim 1, wherein before the transmitting the passive intermodulation test signal, the method further comprises: setting a signal transmission frequency and a signal reception frequency. The method according to claim 2, wherein determining the correspondence between the size of the passive intermodulation and the location according to the time relationship between the passive intermodulation signal and the passive intermodulation test signal includes:

Determining a first time function of the passive intermodulation signal relative to the passive intermodulation test signal and determining a magnitude of passive intermodulation;

Determining, according to a transmit link delay value, a receive link delay value, and the first time function, a second time function of the passive intermodulation signal from the passive intermodulation point to the base station port of the antenna feeder system;

Determining a position correlation function of the passive intermodulation signal according to the second time function and a signal propagation speed, and determining a size and location of the passive intermodulation according to the position correlation function and the size of the passive intermodulation Correspondence. The method of claim 3, wherein setting the signal transmission frequency and the signal receiving frequency specifically comprises:

Determining, according to the start and stop frequency of the base station, an intersection of the M-th order intermodulation start-stop frequency of the base station and the receiving frequency of the base station, where M is a positive integer;

Setting a signal transmission frequency to be a start and stop frequency of the base station;

The signal receiving frequency is set to a frequency of the M-th order intermodulation signal, wherein the frequency of the M-th order intermodulation signal falls within a receiving frequency range of the base station. The method according to claim 4, wherein determining a first time function of the passive intermodulation signal relative to the passive intermodulation test signal, and determining a size of the passive intermodulation specifically includes: Performing correlation processing on the passive intermodulation signal X (n) and the passive intermodulation test signal Y (n) to determine the passive intermodulation signal X (n) and the passive intermodulation test Time of signal Y (n)

N-M

C(m) = X n).conj(Y n + m))

Correlation function "=. , where m = 0...Ml, j is a convolution calculation; obtaining a plurality of correlation peaks C (K) according to the time correlation function, wherein each correlation peak and corresponding corresponding positions are absent Source intermodulation, according to the total amplitude of the passive intermodulation test signal Y (n)

AM total = Υ(")| ΐ ^)|

Determine the passive intermodulation size corresponding to the correlation peak C (Κ) A„=LL^[, where

ΑΜ

Κ is the number of points corresponding to the correlation peak C (Κ);

Determining, according to the time correlation function, the first time function of the passive intermodulation signal X(n) relative to the passive intermodulation test signal Υ(η) [= Κ*, where f _s is a sampling rate. The method according to claim 5, wherein the passive intermodulation signal is determined to be passive from the antenna feeder system according to a transmit link delay value, a receive link delay value, and the first time function. The second time function of the intermodulation point to the base station port specifically includes:

Obtaining the second time of the passive intermodulation signal from the passive intermodulation point to the base station port according to the transmit link delay value, the receive link delay value, and the first time function Function ( _t ) _{= C} ( ^t ~ ' ~ ^Tl )*k

² , where t is the round-trip time of the passive intermodulation signal from the passive intermodulation point to the base station port of the antenna feeder system, k is the calibration value of the passive intermodulation size, and _τι is the transmitting link of the base station before calibration The delay value is delayed to the delay value of the receiving link that is calibrated before the base station leaves the factory. The method according to claim 6, wherein the position correlation function of the passive intermodulation signal is determined according to the second time function and the signal propagation speed, and according to the position correlation function and the passive intermodulation The size determines the correspondence between the size of the passive intermodulation and the location, including:

Determining a position correlation function of the passive intermodulation signal ^) = ^) = >< ^ according to the second time function and the signal propagation speed, where V is the signal propagation speed and _Vf is the relative propagation constant of the cable, c Is the speed of light; according to the correlation peak C (K) corresponding to the passive intermodulation size A„ =^3⁄4l and the position correlation

ΑΜ

The function ί = VXP(t) = v _f xcx P(t) determines the correspondence between the size of the passive intermodulation and the location. a passive intermodulation position detecting device,

a transmitting acquisition module, configured to transmit a passive intermodulation test signal, and collect a passive intermodulation signal; and the processing module is configured to determine, according to a time relationship between the passive intermodulation signal and the passive intermodulation test signal, The correspondence between the size of the source intermodulation and the location. The device of claim 8, wherein the device further comprises:

Set the module to set the signal transmission frequency and signal reception frequency. The device of claim 9, wherein the processing module specifically includes:

a first time determining module configured to determine a first time function of the passive intermodulation signal relative to the passive intermodulation test signal, and calculate a size of the passive intermodulation;

a second time determining module, configured to determine, according to a transmit link delay value, a receive link delay value, and the first time function, the passive intermodulation signal in the antenna feed system from a passive intermodulation point to a second time function of the base station port;

a position determining module, configured to determine a position correlation function of the passive intermodulation signal according to the second time function, and a signal propagation speed, and determine a passive mutual according to the position correlation function and the size of the passive intermodulation The correspondence between the size of the tone and the location. The device according to claim 10, wherein the setting module is specifically configured to: determine, according to a start and stop frequency of the base station, an intersection of a start-stop frequency of the M-th order intermodulation of the base station and a receive frequency of the base station, where M is positive An integer is set; a signal transmission frequency is set as a start and stop frequency of the base station; and a signal reception frequency is set to a frequency of the M-th order intermodulation signal, wherein a frequency of the M-th order intermodulation signal falls within a receiving frequency range of the base station. The apparatus according to claim 11, wherein the first time determining module is specifically configured to: correlate the passive intermodulation signal X (n) and the passive intermodulation test signal Y (n) And processing, determining a time correlation function of the passive intermodulation signal X (n) and the passive intermodulation test signal Y (n) (: (") = ^ (") 0^( (" + «) Wherein, m=0...Ml, j is a convolution calculation; obtaining a plurality of correlation peaks C(K) according to the time correlation function, wherein each correlation peak and corresponding intermodulation of different positions, According to the total amplitude of the passive intermodulation test signal Y ( n ) Gas

, where K is the number of points corresponding to the correlation peak C (K);

Determining, according to the time correlation function, the first time function of the passive intermodulation signal X (n) relative to the passive intermodulation test signal Y (n) [ = Κ * , where f _s is a sampling rate. The device according to claim 12, wherein the second time determining module is specifically configured to: obtain the none according to a transmit link delay value, a receive link delay value, and the first time function The second time function of the source intermodulation signal in the antenna feeder system from the passive intermodulation point to the base station port ( _t ) _{= C} ( ^t ~ ^l ~ ^Tl ) * k

² , where t is the round-trip time of the passive intermodulation signal from the passive intermodulation point to the base station port of the antenna feeder system, k is the calibration value of the passive intermodulation size, and _τι is the transmitting link of the base station before calibration The delay value is delayed to the delay value of the receiving link that is calibrated before the base station leaves the factory. The device of claim 13, wherein the location determining module is specifically configured to:

Determining a position correlation function of the passive intermodulation signal ^) = ^) = >< ^ according to the second time function and the signal propagation speed, where V is the signal propagation speed and _Vf is the relative propagation constant of the cable, c For the speed of light;

|c(^)|

A

The peak of the correlation C (K) corresponding to the size of the passive intermodulation ^{"^} Μ correlation function and the position and size ί = VXP location _{(t) = v f xcx P} (t) is determined to passive intermodulation Correspondence.