CN106790897A - For the verification experimental verification platform of millimeter wave radio communication - Google Patents
For the verification experimental verification platform of millimeter wave radio communication Download PDFInfo
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- CN106790897A CN106790897A CN201611106094.6A CN201611106094A CN106790897A CN 106790897 A CN106790897 A CN 106790897A CN 201611106094 A CN201611106094 A CN 201611106094A CN 106790897 A CN106790897 A CN 106790897A
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- 238000012795 verification Methods 0.000 title claims abstract description 30
- 238000004891 communication Methods 0.000 title claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 105
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- 230000008569 process Effects 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 19
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- 230000005540 biological transmission Effects 0.000 description 10
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- 238000011160 research Methods 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000009432 framing Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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Abstract
The invention discloses a kind of verification experimental verification platform for millimeter wave radio communication, it includes baseband processing unit, RF processing unit, gps clock module and power module；The baseband processing unit and the RF processing unit are connected with each other by ten thousand mbit ethernet interfaces, and the gps clock module is connected with the baseband processing unit and the RF processing unit respectively by data/address bus；The baseband processing unit is used to generate and analyze and process the baseband signal corresponding to millimeter-wave signal；The RF processing unit carries out radio frequency processing and is converted into millimeter-wave signal launching for baseband signal, and being converted into baseband signal for carrying out radio frequency processing to the millimeter-wave signal for receiving sends to the baseband processing unit；The gps clock module is used to provide reference clock signal and reference local oscillator signal to the baseband processing unit and the RF processing unit.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a test verification platform for millimeter wave wireless communication.
Background
The evolution of wireless communication has gone through 4 generations, and analog communication, which can only transmit voice services, has appeared at the earliest; the second generation (2G) mainly uses GSM and mainly transmits voice and low-speed data services; the third generation (3G) comprises WCDMA, TD-S and the like, the mobile internet operation is realized primarily, and the popularization of the smart phone is promoted; the fourth generation (4G) enables high-speed wireless access and rich multimedia applications. The fifth generation (5G) wireless communication technology is still in an early development stage internationally, and no specific international standard exists in the related technology. In anticipation, 5G will bring revolutionary leap to wireless communication, and the core goal of 5G is to realize ultra-high speed data transmission, and the transmission rate reaches several G or even 10G bit rate, thereby completely solving the rate bottleneck of the current mobile communication. In order to achieve the goal of ultra-high speed data transmission, 5G needs to adopt a completely new wireless transmission technology, and due to frequency resource and bandwidth problems, a higher frequency band, such as millimeter wave, needs to be used, the modulation bandwidth can span from the present tens of M to 500M to 3GHz, and a new physical layer technology including modulation coding and multiple access is also used, so that research and verification on the 5G key technology is a major task at present.
The core technology for realizing the ultra-high data transmission target of the fifth generation mobile communication system is to modulate by adopting millimeter wave frequency band and ultra-wide band signals up to 500MHz-4GHz, which far exceed the frequency range and modulation bandwidth used by the latest 4G and WLAN technologies at present, and provide great challenges for the current 5G research and product development, and new devices, modules, base bands and radio frequency microwave systems need to be researched and developed. Therefore, a test verification platform for millimeter wave wireless communication (5G terminal) research and test is urgently needed at present.
Disclosure of Invention
In view of the above, the invention provides a test verification platform for millimeter wave wireless communication, which can generate and analyze millimeter wave signals, can realize transmission and reception in a millimeter wave frequency band (500M to 3GHz ultra wide band signals), and meets the requirements of research and product development test verification of 5G terminals.
In order to achieve the purpose, the invention adopts the following technical scheme:
a test verification platform for millimeter wave wireless communication comprises a baseband processing unit, a radio frequency processing unit, a GPS clock module and a power supply module for providing a working power supply; the baseband processing unit and the radio frequency processing unit are connected with each other through a gigabit Ethernet interface, and the GPS clock module is respectively connected with the baseband processing unit and the radio frequency processing unit through a data bus; the baseband processing unit comprises an SoC chip set and an FPGA chip set which are connected with each other; the baseband processing unit is used for generating a first baseband signal corresponding to the millimeter wave signal and sending the first baseband signal to the radio frequency processing unit; the baseband processing unit is further configured to analyze and process a second baseband signal received from the radio frequency processing unit; the radio frequency processing unit is used for performing radio frequency processing on the first baseband signal, converting the first baseband signal into a millimeter wave signal and transmitting the millimeter wave signal; the radio frequency processing unit is also used for carrying out radio frequency processing on the received millimeter wave signal, converting the millimeter wave signal into a second baseband signal and sending the second baseband signal to the baseband processing unit; the GPS clock module is used for providing a reference clock signal and a reference local oscillator signal for the baseband processing unit and the radio frequency processing unit.
Specifically, the SoC chip set and the FPGA chip set are respectively provided with an SFP interface, and the SoC chip set and the FPGA chip set exchange data with the radio frequency processing unit through the SFP interface.
Specifically, the SoC chip set comprises at least two SoC chips, and each SoC chip exchanges data with the FPGA chip set through a GE interface; the FPGA chip set comprises at least two FPGA chips, and data exchange is carried out between any two FPGA chips through a high-number serial interface.
Specifically, each SoC chip and each FPGA chip are respectively connected to a DDR3 memory.
Specifically, the capacity of the DDR3 memory is 3 GB.
Specifically, the SoC chipset includes two SoC chips, and the FPGA chipset includes four FPGA chips.
Specifically, the radio frequency processing unit includes a control and interface module, a millimeter wave radio frequency module, and a radio frequency front end module; the control and interface module is used for controlling the processing of signals and realizing the data exchange with the baseband processing unit; the millimeter wave radio frequency module is used for converting the first baseband signal into a millimeter wave signal and converting the received millimeter wave signal into a second baseband signal; the radio frequency front end module is used for transmitting and receiving millimeter wave signals.
Specifically, the control and interface module includes an FPGA chip, a digital-to-analog converter, an analog-to-digital converter, a USB3.0 interface, an SFP interface, and a PCIe interface.
Specifically, the millimeter wave radio frequency module comprises a voltage-controlled oscillator, a mixer, a power amplifier, a low noise amplifier, a phase-locked loop, a filter, a transmitting circuit and a receiving circuit.
Specifically, the radio frequency front end module comprises a duplexer and an antenna.
The test verification platform for millimeter wave wireless communication provided by the embodiment of the invention can generate and analyze millimeter wave signals, can realize transmission and reception in a millimeter wave frequency band (500M to 3GHz ultra-wideband signals), and meets the requirements of research and product development test verification of 5G terminals.
Drawings
FIG. 1 is a block diagram of a test validation platform for millimeter wave wireless communications in an embodiment of the present invention;
fig. 2 is a block diagram of a baseband processing unit in the embodiment of the present invention;
fig. 3 is a block diagram of a radio frequency processing unit in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
Referring to fig. 1 to 3, the present embodiment provides a test verification platform for millimeter wave wireless communication. The verification platform comprises a baseband processing unit 1, a radio frequency processing unit 2, a GPS clock module 3 and a power supply module 4 for providing working power supply. The baseband processing unit 1 and the radio frequency processing unit 2 are connected to each other through a gigabit ethernet interface 5, and the GPS clock module 3 is connected to the baseband processing unit 1 and the radio frequency processing unit 2 through a data bus 6.
The baseband processing unit 1 includes an SoC chip set 11 and an FPGA chip set 12 connected to each other. The baseband processing unit 1 is configured to generate a first baseband signal corresponding to the millimeter wave signal, and send the first baseband signal to the radio frequency processing unit 2; the baseband processing unit 1 is further configured to perform analysis processing on a second baseband signal received from the radio frequency processing unit 2. The radio frequency processing unit 2 is configured to perform radio frequency processing on the first baseband signal, convert the first baseband signal into a millimeter wave signal, and transmit the millimeter wave signal; the radio frequency processing unit 2 is further configured to perform radio frequency processing on the received millimeter wave signal, convert the millimeter wave signal into a second baseband signal, and send the second baseband signal to the baseband processing unit 1. The GPS clock module 3 is configured to provide a reference clock signal and a reference local oscillator signal to the baseband processing unit 1 and the radio frequency processing unit 2.
The baseband processing unit 1 is a key module for verifying data generation and analysis of millimeter wave communication, and needs to meet the requirements of complexity and real-time performance of various algorithms, and meanwhile needs to have a high-speed interface capability for connecting the radio frequency processing unit and the core network. Specifically, in this embodiment, as shown in fig. 2, the SoC chipset 11 includes two SoC chips, and the FPGA chipset 12 includes four FPGA chips. The SoC chip set 11 and the FPGA chip set 12 are respectively provided with an SFP interface, and the SoC chip set and the FPGA chip set exchange data with the radio frequency processing unit 2 through the SFP interface. Each SoC chip exchanges data with the FPGA chip set 12 through a GE interface, and any two FPGA chips exchange data through a high-number serial interface. It should be noted that, in some other embodiments, other numbers of SoC chips and FPGA chips may be selected, but the number of SoC chips should be at least two, and each SoC chip exchanges data with the FPGA chip set through the GE interface; the number of the FPGA chips is at least two, and data exchange is carried out between any two FPGA chips through a high-number serial interface. Further, as shown in fig. 2, each SoC chip and each FPGA chip are respectively connected to a DDR3 memory. Specifically, in this embodiment, the capacity of the DDR3 memory is 3 GB.
In the structure of the baseband processing unit 1, the processing chips exchange data by using the ultra-high-speed serial interface, and the single-board processing capacity reaches 4000 GMAC. The baseband processing unit 1 can provide a plurality of high-speed serial ports at 12.5Gbps, and these interfaces can be configured as SFP interfaces and GE interfaces (inter-board data exchange, and via an external 10GE switch, the requirements of real-time data transmission, broadcasting and distribution can be satisfied). In addition, switching bandwidths of up to 480Gbps will also be provided within the processing boards to meet the high speed connections between the chips within the boards. In addition, the baseband processing unit 1 will contain 18GB of DDR3 memory, which can be used for data storage and buffering.
As shown in fig. 3, the rf processing unit 2 includes a control and interface module 21, a millimeter wave rf module 22, and an rf front-end module 23. The control and interface module 21 is configured to control processing of signals and implement data exchange with the baseband processing unit 1; the millimeter wave radio frequency module 22 is configured to convert the first baseband signal into a millimeter wave signal, and is further configured to convert the received millimeter wave signal into a second baseband signal; the radio frequency front end module 23 is configured to transmit and receive millimeter wave signals.
Specifically, the control and interface module 21 includes an FPGA chip, a digital-to-analog converter DAC, an analog-to-digital converter ADC, a USB interface, an SFP interface, and a PCIe interface. The millimeter wave radio frequency module 22 includes a voltage controlled oscillator VCO, a mixer Mix, a power amplifier PA, a low noise amplifier LNA, a phase locked loop PLL, a filter RF filter, and a transmitting circuit Tx and a receiving circuit Rx. The radio frequency front end module 23 comprises a duplexer DUP and an antenna ANT.
The FPGA in the control and interface module 21 serves as the brain of the module, and takes charge of the control task of the control and interface module 21, and in addition, the FPGA can assist in sharing the functions of part of the baseband processing unit 1. The control and interface module 21 is provided with three interfaces, namely a USB interface, an SFP interface and a PCIe interface. Wherein, the SFP interface is used for exchanging data with the baseband processing unit 1; the USB interface is USB3.0 interface, and since some current general wireless platforms (for example, USRP B210) use USB3.0 interface, the control and interface module 21 supports the interface and is compatible with USRP B210, so that if the baseband board uses a PC based on GPP architecture, it can be connected to the rf processing unit 2 in the present invention as long as there is USB3.0 interface. The PCIe interface is a standard interface for Eurecom's recommended Express MIMO2 platform, and is used by a few people in the industry, but is an official release hardware and is used by many small-sized uTCA architectures, and thus is also integrated in the control and interface module 21.
Each functional module in the millimeter wave radio frequency module 22 may be integrated, or may be formed by discrete components. The interface between the millimeter wave radio frequency module 22 and the control and interface module 21 is an analog interface, the signal converted by the digital-to-analog converter DAC on the transmission link is accessed to the millimeter wave radio frequency module 22 for modulation, and the signal demodulated on the reception link is connected to the analog-to-digital converter ADC.
The antenna ANT in the radio frequency front-end module 23 may be designed according to actual needs, and if functions such as general millimeter wave and MassiveMIMO are used together, the terminal generally needs at least 4 antennas, and even 8 antennas, and at this time, an antenna array of millimeter waves needs to be made.
In the test verification platform for millimeter wave wireless communication provided above, in the data sending direction, functions such as channel coding, interleaving/rate matching, modulation, serial-to-parallel conversion and the like are implemented by using the SoC, and in consideration of the processing capability of the SoC and in order to avoid frequent data exchange between chips, these functional modules are implemented in the SoC chip set 11 in one board as a whole. The cooperative precoding function module is used as a sending core module, the operation complexity of the high-order matrix is extremely high, floating point numbers are required to be adopted to perform operation of intermediate steps (certain errors are brought about by continuous rounding and truncation in the operation process of fixed point numbers to ensure that the bit width of intermediate data can be kept in a reasonable range, and the rounding or truncation can bring about certain errors each time, and after the errors are accumulated continuously, the errors are larger and larger, so that the final data cannot meet the requirement of precision, and the result cannot be used at all). After precoding, OFDM modulation and physical framing are also realized by the FPGA chip, and unnecessary data exchange is reduced, so that time delay is reduced. The framed data is sent to the radio frequency processing unit through a plurality of standard SFP interfaces (standard CPRI protocol or other high-speed serial protocols can be adopted), and the radio frequency processing unit completes the functions of up-sampling filtering, synchronous control (to ensure the consistency of signal sending among antennas of the antenna array) and radio frequency daughter board control (including frequency point, gain control and the like). In the data receiving direction, the main functions of the radio frequency processing unit include: the control of the radio frequency sub-board, the automatic gain control, the synchronous control, the timing synchronization, the digital down-conversion, the down-sampling filtering and the like is realized by an FPGA in the radio frequency processing unit. The functions of physical layer de-framing, OFDM demodulation, channel estimation and the like are realized on the FPGA chip set 12, but part of the control functions are completed by the SoC chip set 11, and the demodulation and de-interleaving functions, the channel decoding module and the like are also realized in the FPGA chip set 12. The MAC function of the terminal is responsible for data service convergence, splitting/packing, arq (automatic Repeat request), and processing of various control management signaling, etc., which are all implemented in the SoC chip of the baseband board. On the control and service terminal, control software of the test verification platform needs to be developed to serve as a man-machine interface of the prototype platform, so that configuration, control, equipment state monitoring and acquisition and processing of various performance data of the whole prototype platform are completed, and various test verification works are facilitated. In addition, the control and service server will also be a service source server, such as a video source and a data source.
In summary, in the test verification platform for millimeter wave wireless communication provided by the embodiment of the present invention, the baseband processing unit includes an SoC chip set and an FPGA chip set that are connected to each other, and data exchange is performed between the processing chips by using an ultra-high-speed serial interface, which can generate and analyze millimeter wave signals, can implement transmission and reception in a millimeter wave frequency band (500M to 3GHz ultra-wide band signals), and meets the requirements of research and product development test verification of a 5G terminal. And the built baseband processing unit and the built radio frequency processing unit have configurable capacity and expandable capacity, can construct various evaluation scenes to flexibly test and verify various key technologies, and are suitable for the requirements of millimeter wave communication tests with continuously improved functions in the future.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. A test verification platform for millimeter wave wireless communication is characterized by comprising a baseband processing unit, a radio frequency processing unit, a GPS clock module and a power supply module for providing a working power supply; the baseband processing unit and the radio frequency processing unit are connected with each other through a gigabit Ethernet interface, and the GPS clock module is respectively connected with the baseband processing unit and the radio frequency processing unit through a data bus;
the baseband processing unit comprises an SoC chip set and an FPGA chip set which are connected with each other; the baseband processing unit is used for generating a first baseband signal corresponding to the millimeter wave signal and sending the first baseband signal to the radio frequency processing unit; the baseband processing unit is further configured to analyze and process a second baseband signal received from the radio frequency processing unit;
the radio frequency processing unit is used for performing radio frequency processing on the first baseband signal, converting the first baseband signal into a millimeter wave signal and transmitting the millimeter wave signal; the radio frequency processing unit is also used for carrying out radio frequency processing on the received millimeter wave signal, converting the millimeter wave signal into a second baseband signal and sending the second baseband signal to the baseband processing unit;
the GPS clock module is used for providing a reference clock signal and a reference local oscillator signal for the baseband processing unit and the radio frequency processing unit.
2. The experiment verification platform for millimeter wave wireless communication according to claim 1, wherein the SoC chipset and the FPGA chipset are respectively provided with an SFP interface, and the SoC chipset and the FPGA chipset exchange data with the radio frequency processing unit through the SFP interface.
3. The experiment verification platform for millimeter wave wireless communication according to claim 2, wherein the SoC chip set comprises at least two SoC chips, and each SoC chip exchanges data with the FPGA chip set through a GE interface; the FPGA chip set comprises at least two FPGA chips, and data exchange is carried out between any two FPGA chips through a high-number serial interface.
4. The experimental verification platform for millimeter wave wireless communication according to claim 3, wherein each SoC chip and each FPGA chip are respectively connected with a DDR3 memory.
5. The experimental verification platform for millimeter wave wireless communication according to claim 4, wherein the capacity of the DDR3 memory is 3 GB.
6. The experiment verification platform for millimeter wave wireless communication according to claim 3, wherein the SoC chipset comprises two SoC chips and the FPGA chipset comprises four FPGA chips.
7. The experimental verification platform for millimeter wave wireless communication according to any one of claims 1 to 6, wherein the radio frequency processing unit comprises a control and interface module, a millimeter wave radio frequency module, and a radio frequency front end module; wherein,
the control and interface module is used for controlling the processing of signals and realizing the data exchange with the baseband processing unit;
the millimeter wave radio frequency module is used for converting the first baseband signal into a millimeter wave signal and converting the received millimeter wave signal into a second baseband signal;
the radio frequency front end module is used for transmitting and receiving millimeter wave signals.
8. The experimental verification platform for millimeter wave wireless communication of claim 7, wherein the control and interface module comprises an FPGA chip, a digital-to-analog converter, an analog-to-digital converter, and USB3.0, SFP, and PCIe interfaces.
9. An experimental verification platform for millimeter wave wireless communication according to claim 7, wherein the millimeter wave radio frequency module comprises a voltage controlled oscillator, a mixer, a power amplifier, a low noise amplifier, a phase locked loop, a filter, and a transmitting circuit and a receiving circuit.
10. An experimental verification platform for millimeter wave wireless communication according to claim 7, wherein the radio frequency front end module comprises a duplexer and an antenna.
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| CN111082861A (en) * | 2019-12-02 | 2020-04-28 | 广东省电信规划设计院有限公司 | Millimeter wave communication test system |
| CN113326227A (en) * | 2021-08-03 | 2021-08-31 | 上海国微思尔芯技术股份有限公司 | Link multiplexing method, system and prototype verification method |
| CN113442938A (en) * | 2021-08-31 | 2021-09-28 | 国汽智控(北京)科技有限公司 | Vehicle-mounted computing system, electronic equipment and vehicle |
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Application publication date: 20170531 |