System, method, device, processor and readable storage medium thereof for realizing phase calibration function of massive MIMO transceiver
By combining a signal source with a vector network analyzer, the phase jitter of the reference channel is reduced, the reliability problem of phase calibration values in large-scale MIMO systems is solved, high-reliability phase consistency calibration is achieved, and the communication performance of MIMO transceivers is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TRANSCOM INSTR
- Filing Date
- 2022-12-09
- Publication Date
- 2026-06-05
AI Technical Summary
In large-scale MIMO systems, phase inconsistency in radio frequency circuits affects the reciprocity of communication channels. Existing calibration methods suffer from large phase errors introduced by phase jitter in the reference channel, resulting in low reliability of phase calibration values and difficulty in ensuring phase consistency.
By using a signal source as a reference channel and combining it with a vector network analyzer, the phase difference between the signals at the second port and the first port of the vector network analyzer is calculated as the phase difference of the current channel, thereby reducing phase jitter in the reference channel and improving the reliability of calibration data.
It effectively reduces phase jitter in the reference channel, improves the phase calibration accuracy and reliability of large-scale MIMO transceivers, and ensures the phase consistency of the system.
Smart Images
Figure CN115955281B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of calibration technology for communication measurement instruments, and more particularly to the field of calibration technology for massive MIMO systems. Specifically, it relates to a system, method, apparatus, processor, and computer-readable storage medium for realizing phase calibration function of massive MIMO transceivers. Background Technology
[0002] Multiple-input multiple-output (MIMO) is one of the enabling technologies for 5G communication. Specifically, it refers to the technology of using multiple antennas to transmit and receive signals in the field of wireless communication. By increasing the number of transmit and receive antennas, the capacity of the communication system can be effectively improved without increasing the system bandwidth.
[0003] Time Division Duplexing (TDD) is currently the mainstream transmission scheme in 5G. Its biggest advantage over Frequency Division Duplexing (FDD) is that it reduces spectrum overhead by half. TDD transmission schemes can utilize channel reciprocity, allowing the base station to obtain accurate Channel State Information (CSI) before performing downlink precoding, thus ensuring communication reliability.
[0004] However, in actual communication, a complete communication channel includes not only the airborne wireless channel but also the radio frequency (RF) circuits in the MIMO transmitter and receiver. Phase inconsistencies in the RF circuits can disrupt the reciprocity of the communication channel. Phase calibration of the RF circuits can bring the phase consistency of the MIMO transceiver closer together, thereby maximizing the reciprocity of the communication channel. Compared to the few antennas in 4G, 5G communication systems have 128 or even 256 antennas, corresponding to 128 or 256 RF transmit and receive channels. Clearly, a larger number of channels necessitates more reliable phase consistency calibration.
[0005] Taking an RF transmitter as an example, the main components of a single RF transmission channel are as follows: Figure 1 As shown, it includes a mixer, a local oscillator, and a power amplifier. Figure 2 As shown, the input signal , local oscillator signal ,in If the local oscillator experiences phase jitter, then the output signal is: It is evident that the phase jitter of the local oscillator is directly superimposed on the RF transmitting channel. Similarly, the phase jitter of the local oscillator will also be directly superimposed on the RF receiving channel.
[0006] Generally, communication systems geared towards civilian use need to consider cost reduction, especially large-scale MIMO communication systems. Due to the large number of channels, it is even more necessary to use cost-effective components, thus the selected components are generally of relatively ordinary performance. The local oscillator in the system is affected by phase noise, resulting in relatively large phase jitter. The relationship between phase jitter and phase noise is as follows:
[0007]
[0008] in This is phase jitter. The image shows the phase noise power spectral density of the local oscillator. It can be seen that the worse the phase noise, the greater the phase jitter. The phase noise is directly affected by the price; the cheaper the local oscillator, the worse the phase noise, resulting in greater phase jitter.
[0009] In the phase calibration of MIMO transmitters, traditional methods such as Figure 2 As shown, one channel is used as a reference and connected to port 1 of the vector network analyzer. The remaining transmit channels are then switched one by one to port 2 of the vector network analyzer. The phase difference between the signal received at port 2 and port 1 is used as the phase calibration value for that port. As can be seen from the previous text, using one channel as a reference means that the phase jitter of the reference itself will affect the phase accuracy of other ports, thus affecting the phase consistency of the MIMO transmitter.
[0010] In the phase calibration of a MIMO receiver, the signal output from the signal source is split into two by a power divider. One path is connected to RX1 as the reference channel, and the other path is connected to each of the remaining receiving channels. The phase difference between the currently connected RXI port and the RX1 port is detected internally and used as the phase calibration value for that port. This method also suffers from the problem of the reference phase jitter error being superimposed on the calibration of other receiving channels, affecting the phase consistency of the MIMO receiver.
[0011] It is particularly important to address the phase calibration error caused by phase jitter, obtain more reliable phase calibration values, and ensure higher phase consistency in large-scale MIMO systems. Summary of the Invention
[0012] The purpose of this invention is to overcome the shortcomings of the prior art and provide a system, method, apparatus, processor and computer-readable storage medium thereof that achieves phase calibration function of large-scale MIMO transceivers with good reliability, high phase consistency and wide applicability.
[0013] To achieve the above objectives, the present invention provides a system, method, apparatus, processor, and computer-readable storage medium for implementing phase calibration functionality in a large-scale MIMO transceiver, as follows:
[0014] The system for implementing phase calibration of a large-scale MIMO transceiver is characterized by comprising a MIMO transceiver, a signal source, and a vector network analyzer.
[0015] When calibrating the transmit phase of the MIMO transceiver, the output of the signal source is connected to the first port of the vector network analyzer, and the transmit channels TX1 to TXn of the MIMO transceiver are connected one by one to the second port of the vector network analyzer.
[0016] When calibrating the receiving phase of the MIMO transceiver, the system also includes a 1-to-2 power divider. The input of the 1-to-2 power divider is connected to the output of the signal source. One output of the 1-to-2 power divider is connected to the first port of the vector network analyzer, and the other output is switched one by one to the receiving channels RX1 to RXn of the MIMO transceiver. The output of the MIMO transceiver is connected to the second port of the vector network analyzer.
[0017] Preferably, when calibrating the transmit phase of the MIMO transceiver, the output signal of the signal source serves as a reference channel, and the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current TXI channel.
[0018] Preferably, the phase difference is calculated when calibrating the transmit phase of the MIMO transceiver. Specifically:
[0019] The phase difference is calculated when calibrating the transmit phase of a MIMO transceiver using the following formula. :
[0020]
[0021] in, The signal phase from the transmit channel TXI detected by the second port of the vector network analyzer. The signal phase from the signal source is detected at the first port of the vector network analyzer.
[0022] Preferably, when calibrating the receive phase of the MIMO transceiver, the receive channel RX1 of the MIMO transceiver is used as a reference channel, and the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current RXI channel.
[0023] Preferably, the phase difference is calculated when calibrating the receiving phase of the MIMO transceiver. Specifically:
[0024] The phase difference is calculated when calibrating the receive phase of a MIMO transceiver using the following formula. :
[0025]
[0026] in, For the phase error of the receive channel RXI, For the fixed phase error of the digital signal data stream in baseband, For the fixed phase error of the transmit channel TXn, and All errors are fixed values.
[0027] The method for implementing phase calibration processing of large-scale MIMO transceivers is characterized by the fact that the method includes a process for calibrating the transmit phase of the MIMO transceiver, specifically comprising the following steps:
[0028] Using the output signal of the signal source as a reference channel, the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current TXI channel;
[0029] The method includes a process for calibrating the receive phase of a MIMO transceiver, specifically comprising the following steps:
[0030] Using the MIMO transceiver's receive channel RX1 as a reference channel, the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current RXI channel.
[0031] Preferably, the phase difference is calculated when calibrating the transmit phase of the MIMO transceiver in the aforementioned step. Specifically:
[0032] The phase difference is calculated when calibrating the transmit phase of a MIMO transceiver using the following formula. :
[0033]
[0034] in, The signal phase from the transmit channel TXI detected by the second port of the vector network analyzer. The signal phase from the signal source is detected at the first port of the vector network analyzer.
[0035] Preferably, the phase difference is calculated when calibrating the receiving phase of the MIMO transceiver in the aforementioned step. Specifically:
[0036] The phase difference is calculated when calibrating the receive phase of a MIMO transceiver using the following formula. :
[0037]
[0038] in, For the phase error of the receive channel RXI, For the fixed phase error of the digital signal data stream in baseband, For the fixed phase error of the transmit channel TXn, and All errors are fixed values.
[0039] The main feature of this apparatus for implementing phase calibration processing in large-scale MIMO transceivers is that the apparatus comprises:
[0040] A processor is configured to execute computer-executable instructions;
[0041] The memory stores one or more computer-executable instructions, which, when executed by the processor, implement the steps of the method for implementing phase calibration processing of a large-scale MIMO transceiver described above.
[0042] The processor used to implement phase calibration processing for a massive MIMO transceiver is characterized in that the processor is configured to execute computer-executable instructions, which, when executed by the processor, implement the various steps of the method for implementing phase calibration processing for a massive MIMO transceiver described above.
[0043] The computer-readable storage medium is characterized in that it stores a computer program thereon, which can be executed by a processor to implement the various steps of the method for implementing phase calibration processing of a large-scale MIMO transceiver described above.
[0044] The system, method, apparatus, processor, and computer-readable storage medium of the present invention for implementing phase calibration function of large-scale MIMO transceivers solve the problem of large phase error caused by phase jitter of the reference channel of the large-scale MIMO system and the reliability problem of phase calibration value, thus ensuring the phase consistency of the large-scale MIMO transceiver system. Attached Figure Description
[0045] Figure 1 This is a schematic diagram showing the main components of a single transmission channel.
[0046] Figure 2 This is a schematic diagram of a traditional MIMO transmitter phase calibration method.
[0047] Figure 3 This is another schematic diagram of a traditional MIMO receiver phase calibration method.
[0048] Figure 4 This is a schematic diagram of the MIMO transmitter phase calibration scheme of the system for realizing the phase calibration function of a large-scale MIMO transceiver according to the present invention.
[0049] Figure 5 This is a schematic diagram of the MIMO receiver phase calibration scheme of the system for realizing the phase calibration function of a large-scale MIMO transceiver according to the present invention.
[0050] Figure 6 This is a schematic diagram of the phase consistency measurement results after phase calibration using a conventional MIMO transceiver.
[0051] Figure 7 This is a schematic diagram of the phase consistency measurement results after phase calibration of a MIMO transceiver using the method of this invention. Detailed Implementation
[0052] To more clearly describe the technical content of the present invention, the following description is provided in conjunction with specific embodiments.
[0053] The present invention relates to a system, method, apparatus, processor, and computer-readable storage medium for implementing phase calibration function of a large-scale MIMO transceiver, including a MIMO transceiver, a signal source, and a vector network analyzer.
[0054] When calibrating the transmit phase of the MIMO transceiver, the output of the signal source is connected to the first port of the vector network analyzer, and the transmit channels TX1 to TXn of the MIMO transceiver are connected one by one to the second port of the vector network analyzer.
[0055] When calibrating the receiving phase of the MIMO transceiver, the system also includes a 1-to-2 power divider. The input of the 1-to-2 power divider is connected to the output of the signal source. One output of the 1-to-2 power divider is connected to the first port of the vector network analyzer, and the other output is switched one by one to the receiving channels RX1 to RXn of the MIMO transceiver. The output of the MIMO transceiver is connected to the second port of the vector network analyzer.
[0056] In a preferred embodiment of the present invention, when calibrating the transmit phase of the MIMO transceiver, the output signal of the signal source serves as a reference channel, and the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current TXI channel.
[0057] In a preferred embodiment of the present invention, the phase difference is calculated when calibrating the transmit phase of the MIMO transceiver. Specifically:
[0058] The phase difference is calculated when calibrating the transmit phase of a MIMO transceiver using the following formula. :
[0059]
[0060] in, The signal phase from the transmit channel TXI detected by the second port of the vector network analyzer. The signal phase from the signal source is detected at the first port of the vector network analyzer.
[0061] In a preferred embodiment of the present invention, when calibrating the receive phase of the MIMO transceiver, the receive channel RX1 of the MIMO transceiver is used as a reference channel, and the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current RXI channel.
[0062] In a preferred embodiment of the present invention, the phase difference is calculated when calibrating the receiving phase of the MIMO transceiver. Specifically:
[0063] The phase difference is calculated when calibrating the receive phase of a MIMO transceiver using the following formula. :
[0064]
[0065] in, For the phase error of the receive channel RXI, For the fixed phase error of the digital signal data stream in baseband, For the fixed phase error of the transmit channel TXn, and All errors are fixed values.
[0066] This method for implementing phase calibration processing of a large-scale MIMO transceiver includes a process for calibrating the transmit phase of the MIMO transceiver, specifically comprising the following steps:
[0067] Using the output signal of the signal source as a reference channel, the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current TXI channel;
[0068] The method includes a process for calibrating the receive phase of a MIMO transceiver, specifically comprising the following steps:
[0069] Using the MIMO transceiver's receive channel RX1 as a reference channel, the vector network analyzer detects and calculates the phase difference between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. And use it as the phase difference of the current RXI channel.
[0070] In a preferred embodiment of the present invention, the step of calibrating the transmit phase of the MIMO transceiver involves calculating the phase difference. Specifically:
[0071] The phase difference is calculated when calibrating the transmit phase of a MIMO transceiver using the following formula. :
[0072]
[0073] in, The signal phase from the transmit channel TXI detected by the second port of the vector network analyzer. The signal phase from the signal source is detected at the first port of the vector network analyzer.
[0074] In a preferred embodiment of the present invention, the step of calibrating the receiving phase of the MIMO transceiver involves calculating the phase difference. Specifically:
[0075] The phase difference is calculated when calibrating the receive phase of a MIMO transceiver using the following formula. :
[0076]
[0077] in, For the phase error of the receive channel RXI, For the fixed phase error of the digital signal data stream in baseband, For the fixed phase error of the transmit channel TXn, and All errors are fixed values.
[0078] The apparatus of the present invention for implementing phase calibration processing of a massive MIMO transceiver, wherein the apparatus comprises:
[0079] A processor is configured to execute computer-executable instructions;
[0080] The memory stores one or more computer-executable instructions, which, when executed by the processor, implement the steps of the method for implementing phase calibration processing of a large-scale MIMO transceiver described above.
[0081] The processor of the present invention for implementing phase calibration processing of a massive MIMO transceiver is configured to execute computer-executable instructions, which, when executed by the processor, implement the various steps of the method for implementing phase calibration processing of a massive MIMO transceiver described above.
[0082] The computer-readable storage medium of the present invention stores a computer program thereon, which can be executed by a processor to implement the various steps of the method for implementing phase calibration processing of a large-scale MIMO transceiver described above.
[0083] In specific embodiments of the present invention, it is necessary to solve the phase error introduced by the phase jitter of the system's own reference channel and the reliability problem of the phase calibration value, so as to ensure the phase consistency of the system.
[0084] This invention provides a novel phase calibration method for large-scale MIMO systems, offering advantages such as high reliability and low jitter. The invention comprises a MIMO transceiver, a signal source, a vector network analyzer, and data flow control software. Using this method, the accuracy and reliability of phase calibration in large-scale MIMO transceivers can be effectively improved. The specific implementation scheme is as follows:
[0085] The calibration scheme for the phase of the MIMO transmitter is as follows: Figure 4 As shown, the signal output from the signal source is used as the reference channel. The signal source output is connected to the first port of the vector network analyzer. The MIMO transmitter transmit channels TX1 to TXn are switched one by one and connected to the second port of the vector network analyzer. The vector network analyzer detects the phase difference between the signal from the second port (TXi) and the signal from the first port. That is, the phase difference of the current TXI channel.
[0086] The method of the present invention ,in The signal phase from TXI detected by the second port of the vector network analyzer. The signal phase detected by the first port of the vector network analyzer from the signal source.
[0087] The phase noise of the signal source output signal is very low, and therefore the phase jitter is also extremely small, which can be considered as... In traditional MIMO transmitters, the phase noise of the transmitter itself is far lower than that of the signal source, typically by about 20-40 dB. This difference is based on the formulas for calculating phase jitter and phase noise. It can be calculated that when the phase noise difference is 20~40dB (which corresponds to a multiple of 100~10000), the phase jitter difference is 10~100 times.
[0088] The phase jitter of a typical economical signal source is 0.1°. Therefore, the phase calibration value of the traditional calibration method (depending on the local oscillator of different prices) will introduce an additional phase error of 1~10°, resulting in very low reliability of calibration data and making it difficult to guarantee phase consistency between large-scale MIMO transmitters.
[0089] Therefore, the method of this invention greatly reduces the phase jitter of the reference channel, improves the reliability of the phase calibration data of the transmit channel, and ensures the phase consistency of large-scale MIMO transmitters.
[0090] The calibration scheme for the phase of a MIMO receiver is as follows: Figure 5 As shown, the signal output from the signal source is split into two by a power divider. One path is connected to the first port of the vector network analyzer, and the other path is sequentially switched to the receiving channels RX1 to RXn of the MIMO receiver. The baseband unit adds data flow control software to connect RX1~RXn sequentially to TXn (TX can be any one of TXI), and then connects the signal output from TXn to the second port of the vector network analyzer.
[0091] RX1 serves as the reference channel, and the other path is sequentially connected to the remaining receiving channels. The baseband internally detects the phase difference between the currently connected RXI port and the RX1 port as the phase calibration value for that port. This method also suffers from the problem of the reference channel's own phase jitter error being superimposed on the calibration of other receiving channels, affecting the phase consistency of the massive MIMO receiver. A vector network analyzer detects the phase difference between the signal from the second port (RXi-TXn) and the first port. That is, the phase difference of the current RXI channel.
[0092] The method of the present invention ,in For the phase error of the receive channel RXI, For the fixed phase error of the digital signal data stream in baseband, For the fixed phase error of the transmit channel TXn, and All errors are fixed values.
[0093] Calibration value for each receive channel Although they all include and There are two fixed phase errors, but the fixed phase error is only equivalent to each receiving channel of the MIMO receiver having a fixed phase offset, and will not affect the phase consistency between the various receiving channels of the MIMO receiver.
[0094] Similarly, the phase noise of the signal source output signal is very low, and the phase jitter is minimal, which can be considered as... In traditional MIMO receivers, the phase noise of the receiver itself is far lower than that of the signal source, typically by about 20-40 dB. This difference is based on the formulas for calculating phase jitter and phase noise. It can be calculated that when the phase noise difference is 20~40dB (which corresponds to a multiple of 100~10000), the phase jitter difference is 10~100 times.
[0095] Therefore, the method of this invention greatly reduces the phase jitter of the reference channel, improves the reliability of the phase calibration data of the receiving channel, and ensures the phase consistency of the large-scale MIMO receiver.
[0096] In this embodiment, the phase of a 64-channel MIMO transceiver at a frequency of 3.5 GHz was calibrated using both the method of this invention and a conventional method. To verify the effectiveness of the method of this invention, the calibration values were substituted into the MIMO transceiver, and a phase consistency test was performed using the same measurement method. The test results are as follows. Figure 6 and Figure 7 As shown.
[0097] Figure 6 In the study, the phase consistency measurement results after phase calibration using a traditional MIMO transceiver showed that the phase consistency of the 64-channel MIMO receiver was 7.8°, and the phase consistency of the MIMO transmitter was 5.8°.
[0098] Figure 7 In the study, the phase consistency measurement results after MIMO transceiver phase calibration using the method of the present invention showed that the phase consistency of the 64-channel MIMO receiver was 2.9° and the phase consistency of the MIMO transmitter was 2.9°.
[0099] The two sets of measurement results show that using the method of this invention for phase calibration of MIMO transceivers solves the problem of the influence of channel phase jitter on the calibration results, improves the reliability of calibration data, and thus ensures the phase consistency of large-scale MIMO transceivers.
[0100] Phase calibration is commonly performed using a vector network analyzer. A vector network analyzer transmits a signal through port 1 and receives a signal through port 2. The phase difference between the received signal and the transmitted signal is the phase difference measured by the vector network analyzer.
[0101] Although this technical solution also uses a vector network analyzer to measure phase, it does not use the signal emitted by the vector network analyzer itself as a reference. As mentioned in the text, the phase noise of the signal emitted by the vector network analyzer is generally low, and calculations show that its own phase has jitter. In many phase measurements, such small phase jitter is not a concern and is generally ignored. However, for MIMO systems, especially when phase consistency requirements are high, it is necessary to reduce the phase jitter value of the vector network analyzer itself as much as possible.
[0102] The vector network analyzer in this invention uses a dual-receive mode, unlike existing technologies. It uses a signal source as a reference signal connected to port 1 of the vector network analyzer, while another signal from the source, after passing through a MIMO system, is connected to port 2. Instead of subtracting its own transmitted signal from the received signal, the vector network analyzer uses the phase difference between the phase of the signal received at port 2 and the phase of the signal received at port 1. Since the phase jitter of the signal source is almost zero, the phase difference between the two signals received by the vector network analyzer is relatively certain and will not be affected by the jitter of the signal at port 1, thus not impacting the calibration results. For a detailed implementation of this embodiment, please refer to the relevant descriptions in the above embodiments; they will not be repeated here.
[0103] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.
[0104] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.
[0105] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0106] The system, method, apparatus, processor, and computer-readable storage medium of the present invention for implementing phase calibration function of large-scale MIMO transceivers solve the problem of large phase error caused by phase jitter of the reference channel of the large-scale MIMO system and the reliability problem of phase calibration value, thus ensuring the phase consistency of the large-scale MIMO transceiver system.
[0107] In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.
Claims
1. A system for implementing phase calibration function in a large-scale MIMO transceiver, characterized in that, The system includes a MIMO transceiver, a signal source, and a vector network analyzer. When calibrating the transmit phase of the MIMO transceiver, the output of the signal source is connected to the first port of the vector network analyzer, and the transmit channels TX1 to TXn of the MIMO transceiver are connected one by one to the second port of the vector network analyzer. When calibrating the receiving phase of the MIMO transceiver, the system also includes a 1-to-2 power divider. The input of the 1-to-2 power divider is connected to the output of the signal source. One output of the 1-to-2 power divider is connected to the first port of the vector network analyzer, and the other output is switched one by one to the receiving channels RX1 to RXn of the MIMO transceiver. The output of the MIMO transceiver is connected to the second port of the vector network analyzer. When calibrating the receive phase of a MIMO transceiver, the system uses the MIMO transceiver's receive channel RX1 as a reference channel. The vector network analyzer detects and calculates the phase difference Δ between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. RXi And use it as the phase difference of the current RXI channel; The phase difference Δ is calculated when calibrating the receiving phase of the MIMO transceiver. RXi Specifically: The phase difference Δ is calculated when calibrating the receive phase of a MIMO transceiver using the following formula. RXi : D RXi =D RX-i +D BB +D TX-n -D generator ; Where, Δ RX-i For the phase error of the receiving channel RXI, Δ BB For the fixed phase error of the digital signal data stream in baseband, Δ TX-n For the fixed phase error of the transmit channel TXn, Δ BB and Δ TX-n All errors are fixed values.
2. The system for implementing phase calibration function of a large-scale MIMO transceiver according to claim 1, characterized in that, When calibrating the transmit phase of a MIMO transceiver, the output signal of the signal source serves as a reference channel. The vector network analyzer detects and calculates the phase difference Δ between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. TXi And use it as the phase difference of the current TXI channel.
3. The system for implementing phase calibration function of a large-scale MIMO transceiver according to claim 2, characterized in that, The phase difference Δ is calculated when calibrating the transmit phase of the MIMO transceiver. TXi Specifically: The phase difference Δ is calculated when calibrating the transmit phase of a MIMO transceiver using the following formula. TXi : D TXi =D TX-i -D generator ; Where, Δ TX-i The signal phase Δ from the transmit channel TXI detected by the second port of the vector network analyzer. generator The signal phase from the signal source is detected at the first port of the vector network analyzer.
4. A method for implementing phase calibration processing of a large-scale MIMO transceiver based on the system described in claim 1, characterized in that, The method includes a process for calibrating the transmit phase of a MIMO transceiver, specifically comprising the following steps: Using the output signal of the signal source as a reference channel, the vector network analyzer detects and calculates the phase difference Δ between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. TXi And use it as the phase difference of the current TXI channel; The method includes a process for calibrating the receive phase of a MIMO transceiver, specifically comprising the following steps: Using the MIMO transceiver's receive channel RX1 as a reference channel, the vector network analyzer detects and calculates the phase difference Δ between the signal received at the second port of the vector network analyzer and the signal at the first port of the vector network analyzer. RXi And use it as the phase difference of the current RXI channel.
5. The method for implementing phase calibration processing of a large-scale MIMO transceiver according to claim 4, characterized in that, The step described above involves calculating the phase difference Δ when calibrating the transmit phase of the MIMO transceiver. TXi Specifically: The phase difference Δ is calculated when calibrating the transmit phase of a MIMO transceiver using the following formula. TXi : D TXi =D TX-i -D generator ; Where, Δ TX-i The signal phase Δ from the transmit channel TXI detected by the second port of the vector network analyzer. generator The signal phase from the signal source is detected at the first port of the vector network analyzer.
6. The system for implementing phase calibration function of a large-scale MIMO transceiver according to claim 5, characterized in that, The step described above involves calculating the phase difference Δ when calibrating the receiving phase of the MIMO transceiver. RXi Specifically: The phase difference Δ is calculated when calibrating the receive phase of a MIMO transceiver using the following formula. RXi : D RXi =D RX-i +D BB +D TX-n -D generator ; Where, Δ RX-i For the phase error of the receiving channel RXI, Δ BB For the fixed phase error of the digital signal data stream in baseband, Δ TX-n For the fixed phase error of the transmit channel TXn, Δ BB and Δ tX-n All errors are fixed values.
7. An apparatus for implementing phase calibration processing in a massive MIMO transceiver, characterized in that, The device includes: A processor is configured to execute computer-executable instructions; The memory stores one or more computer-executable instructions, which, when executed by the processor, implement the steps of the method for implementing phase calibration processing of a large-scale MIMO transceiver as described in any one of claims 4 to 6.
8. A processor for implementing phase calibration processing in a large-scale MIMO transceiver, characterized in that, The processor is configured to execute computer-executable instructions, which, when executed by the processor, implement the steps of the method for implementing phase calibration processing of a massive MIMO transceiver as described in any one of claims 4 to 6.
9. A computer-readable storage medium, characterized in that, It stores a computer program that can be executed by a processor to implement the various steps of the method for implementing phase calibration processing of a large-scale MIMO transceiver as described in any one of claims 4 to 6.