CN103188022B - A kind of method of testing of Antenna Correlation and system - Google Patents

Abstract

The invention discloses a method and system for testing antenna correlation. The system includes: a base station simulator, configured to configure test parameters for multiple antennas of a terminal under test, and notify the terminal under test of the test parameters The terminal under test is used to receive the test parameters from the base station simulator, and use the test parameters corresponding to each antenna to send radio frequency signals on each antenna; the measurement device is used to receive the test parameters sent by the terminal under test on each antenna. The radio frequency signal is used to measure the amplitude and/or phase of the radio frequency signal sent on each antenna; the control device is used to obtain the measurement result of the amplitude and/or phase from the measurement device, and according to the amplitude and/or phase Antenna correlation is calculated from measurements of the phase and/or phase. In the embodiment of the present invention, measurement accuracy and test efficiency can be greatly improved.

Description

An antenna correlation test method and system

technical field

The invention relates to the technical field of communications, in particular to a method and system for testing antenna correlation.

Background technique

The MIMO (Multiple-Input Multiple-Output) system requires the antenna system of the base station and the terminal to be composed of multiple antennas; and the MIMO performance of the terminal is determined by the correlation of multiple antennas (that is, antenna correlation). The design of the terminal antenna is related to the wireless environment where the terminal is located.

For antenna correlation, the existing test methods include: (1) The target signal is transmitted by the known standard antenna, the signal is received by the terminal under test, and the received signal is transmitted to the test instrument. Through the process of measurement, recording, calculation, etc., Obtain the correlation coefficient index of the antenna correlation; (2) Construct a certain wireless environment in the darkroom, and then actually test the antenna correlation of the terminal under test.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

(1) The terminal under test needs to be modified; in the process of completing the antenna correlation test, the terminal under test needs to have functions such as transmission, measurement, and recording, and it is inevitable that the terminal under test needs to be modified.

(2) The test time of the terminal under test as a receiving device is long and the accuracy is low; the test using the terminal under test as a receiving device is usually a test of the receiving sensitivity of the terminal under test, and the test method of receiving sensitivity is under a certain degree of confidence Measure the minimum receiving level when the terminal under test reaches a certain bit error rate. This test method results in a long test time for receiving sensitivity and low test efficiency.

(3) The construction of a specific wireless environment can only examine the antenna correlation one-sidedly; the specific layout of the test environment is equivalent to fixing some parameters in the wireless channel, which reduces the flexibility of the test system and cannot comprehensively and accurately evaluate the measured Antenna correlation of the terminal.

Contents of the invention

Embodiments of the present invention provide a method and system for testing antenna correlation, so as to improve test accuracy and test efficiency.

In order to achieve the above purpose, an embodiment of the present invention provides a test system, including:

A base station simulator, configured to configure test parameters for multiple antennas of the terminal under test, and notify the terminal under test of the test parameters;

The terminal under test is used to receive test parameters from the base station simulator, and use the test parameters corresponding to each antenna to send radio frequency signals on each antenna;

A measuring device, configured to receive radio frequency signals sent by the terminal under test on each antenna, and measure the amplitude and/or phase of the radio frequency signals sent on each antenna;

A control device, configured to obtain the measurement result of the amplitude and/or phase from the measurement device, and calculate the antenna correlation according to the measurement result of the amplitude and/or phase.

An embodiment of the present invention provides a method for testing antenna correlation, including:

The base station simulator configures test parameters for multiple antennas of the terminal under test, and notifies the terminal under test of the test parameters;

The terminal under test receives test parameters from the base station simulator, and uses the test parameters corresponding to each antenna to send radio frequency signals on each antenna;

The measuring device receives the radio frequency signal sent by the terminal under test on each antenna, and measures the amplitude and/or phase of the radio frequency signal sent on each antenna;

The control device obtains the measurement result of the amplitude and/or phase from the measurement device, and calculates the antenna correlation according to the measurement result of the amplitude and/or phase.

Compared with the prior art, the embodiments of the present invention have at least the following advantages: by measuring the radio frequency signals sent by the terminal under test respectively through each antenna, and using the measurement results to calculate the antenna correlation, it is not necessary to carry out the measurement of the terminal under test It can comprehensively, completely and accurately measure the correlation index between multiple antennas of the terminal under test, and can greatly improve the measurement accuracy and test efficiency.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic structural diagram of a test system provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flowchart of a method for testing antenna correlation provided by Embodiment 2 of the present invention.

detailed description

The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

Embodiment 1 of the present invention provides a test system for testing antenna correlation. As shown in FIG. The above-mentioned devices are functional units, which can be further divided or combined. For example, the measurement device 13 and the control device 14 can be deployed on the same measurement and control device, which will not be described in detail in the embodiments of the present invention.

In the embodiment of the present invention, the terminal under test 12 is located in a full-wave OTA anechoic chamber; the base station simulator 11, the measurement device 13 and the control device 14 are located outside a full-wave OTA anechoic chamber; The communication antenna in the full-wave OTA anechoic chamber establishes a communication link (specifically, the communication antenna is located in the full-wave OTA anechoic chamber, and is connected to the base station simulator 11 outside the full-wave OTA anechoic chamber through a radio frequency cable, and establishes a communication link with the terminal under test 12 through an air interface. communication link); the measuring equipment 13 is connected with the receiving antenna located in the full radio wave OTA darkroom (specifically, the receiving antenna is located in the full radio wave OTA darkroom, and is connected with the measuring equipment 13 outside the full radio wave OTA darkroom by a radio frequency cable).

Based on the above networking situation, the functions of each device in the test system are as follows:

The base station simulator 11 is configured to configure test parameters for multiple antennas of the terminal under test 12 and notify the terminal 12 of the test parameters of the test parameters.

Specifically, the base station simulator 11 is specifically configured to establish a communication connection with the terminal under test 12 through a communication antenna, and notify the terminal under test 12 of the test parameters through the communication antenna.

In the embodiment of the present invention, the test parameters include but are not limited to the corresponding working state and transmission power of each antenna, and the corresponding working state of each antenna is an on state or an off state; and the base station simulator 11 is specifically used to configure the measured Parameters such as working states and transmit powers corresponding to each antenna on the terminal 12.

The terminal under test 12 is configured to receive test parameters from the base station simulator 11, and use the test parameters corresponding to each antenna to send radio frequency signals on each antenna.

Specifically, when the working state corresponding to the antenna is the on state, the terminal under test 12 is specifically configured to transmit a radio frequency signal on the antenna through the transmission power corresponding to the antenna.

In the embodiment of the present invention, the terminal under test 12 is a wireless device with a multi-antenna system (multi-antennas can be respectively defined as antenna 1, antenna 2, antenna 3...antenna N), and since the terminal under test 12 can Establish communication with the base station simulator 11, and establish communication with the measurement device 13, so the terminal under test 12 can also be used to receive test parameters from the base station simulator 11, and use the test parameters corresponding to each antenna to send on each antenna The radio frequency signal can be received by the measuring device 13 via a receiving antenna.

Measuring device 13 is used to receive the radio frequency signal sent by the terminal under test 12 on each antenna, and measure the amplitude and/or phase of the radio frequency signal sent on each antenna (the measuring instrument can be arranged inside the measuring device 13, and the measuring instrument is used for measuring the magnitude and/or phase of RF signals).

The measurement device 13 is specifically configured to receive the radio frequency signal sent by the terminal under test 12 on each antenna through the receiving antenna.

The control device 14 is configured to obtain the measurement result of the amplitude and/or phase from the measurement device 13, and calculate the antenna correlation according to the measurement result of the amplitude and/or phase.

Wherein, the control device 14 is used for receiving the measurement result of the magnitude and/or phase from the measurement device 13, and saving the measurement result of the magnitude and/or phase; afterward, the control device 14 is also used for format processing the measurement result, and then The correlation between the antennas is calculated by combining one or more spatial channel model parameters and using the correlation coefficient formula.

Specifically, based on the measurement results of the amplitude and/or phase, the control device 14 is used to perform link compensation on the measurement results, and then compile all the data (that is, the measurement results) of any two antennas (a, b) after compensation, in the form of Two antennas are taken as an example to illustrate) into the calculation formula of the correlation coefficient:

Discretize the above formula to get:

The result calculated by the above formula is the correlation coefficient of the correlation between the antenna a and the antenna b of the tested terminal 12; wherein, Pθ (m, n) and Pφ (m, n) are determined by the spatial channel model defined by the standardization organization Definitely; the meanings of X, θ, E, m, n, P, and φ are the same as those in the prior art, and will not be repeated in the embodiments of the present invention.

Certainly, in practical application, it is not limited to use the above formula to calculate the antenna correlation, and any theory and formula for correlation evaluation can be applied to the embodiment of the present invention, which will not be repeated here.

In the embodiment of the present invention, the control device 14 is also used to synchronize and accurately control other devices (such as the base station simulator 11 and the measurement device 13 ) except the terminal under test 12 according to the test script.

Specifically, the control device 14 is used to instruct the base station simulator 11 to notify the terminal under test 12 of the test parameters; and is used to instruct the measurement device 13 to receive the radio frequency signal sent by the terminal under test 12 on each antenna.

It should be noted that in order to obtain comprehensive and complete information on the multi-antenna system of the terminal 12 under test, it is necessary to collect test data in three dimensions for the terminal 12 under test in a full-wave OTA anechoic chamber. Therefore, as shown in FIG. 1 , the test system also includes a turntable controller 15 located outside the full-wave OTA anechoic chamber and a turntable (a three-dimensional turntable) located inside the full-wave OTA anechoic chamber, and the terminal under test 12 is located on the turntable.

Based on this, the control device 14 is also used to instruct the turntable controller 15 to control the turntable to reach the designated position; the turntable controller 15 controls the turntable to reach the designated position according to the instructions of the control device 14, and the terminal under test 12 positioned on the turntable is at the designated position. The test parameters corresponding to each antenna are used to send radio frequency signals on each antenna.

Further, in order to achieve synchronization and precise control, the control device 14 is used to instruct the turntable controller 15 to control the turntable to reach the specified position, and the turntable controller 15 controls the turntable to reach the specified position according to the instructions of the control device 14; and is used to instruct the base station simulator 11 notifies the terminal under test 12 of the test parameters, and the base station simulator 11 notifies the terminal under test 12 of the test parameters (requiring the terminal under test 12 to send radio frequency signals with maximum transmission power all the time); and, for instructing the measuring device 13 to receive The radio frequency signal sent by the terminal under test 12 on each antenna is received by the measuring device 13 through the receiving antenna, and the amplitude and/or phase are measured.

In the embodiment of the present invention, for the multiple antennas of the terminal under test 12, specifically: the base station simulator 11 is used to issue instructions or through the hardware switching of the terminal under test 12, the terminal under test 12 is set to use the antenna 1 as the Transmit the antenna, and close the other antennas of the terminal under test 12 at the same time. Through the above process, the control device 14 obtains the measurement results of the amplitude and/or phase of the antenna 1; after that, the base station simulator 11 is used to issue instructions or pass the terminal under test 12 hardware switching, the terminal under test 12 is set to use the antenna n (2≤n≤N) as the transmitting antenna, and at the same time close other antennas of the terminal under test 12, through the above process, the control device 14 obtains the amplitude and value of the antenna n Measurement results of/or phases until all N antennas are tested; after that, the control device 14 can be used to calculate antenna correlation according to the measurement results of the amplitude and/or phase of each antenna.

In the embodiment of the present invention, for multiple measurement positions of the terminal under test 12, in order to comprehensively examine all radio frequency signals transmitted by the terminal under test 12, it is necessary to collect and measure the radio frequency signals of the terminal under test 12 in a three-dimensional space; specifically, The control device 14 is used to issue instructions to the turntable controller 15, and the turntable controller 15 controls the turntable to rotate to the next position, and the control device 14 obtains the measurement results of the amplitude and/or phase of each antenna at this position; until the completion All locations that need to be tested, that is, to complete the acquisition of the emission characteristics of the terminal 12 under test in three-dimensional space, so that the control device 14 can be used to calculate the antenna correlation according to the measurement results of the amplitude and/or phase corresponding to each antenna at each location sex.

To sum up, in the embodiment of the present invention, by measuring the radio frequency signals sent by the terminal under test through each antenna, and using the measurement results to calculate the antenna correlation, there is no need to modify the terminal under test, and it can be comprehensively , Completely and accurately measure the correlation index between multiple antennas of the terminal under test, and can greatly improve the measurement accuracy and test efficiency.

Specifically, in the embodiment of the present invention, the terminal under test is used as the transmitting device, and the terminal under test only needs to establish a communication link with the base station simulator to perform normal communication. Transformation (no need to modify the chip, radio frequency, etc. of the terminal under test, and terminals with multi-antenna transmission functions that meet the requirements of the communication protocol can be used), to ensure the accuracy and fairness of the test results, and to complete multiple antennas accurately and efficiently. Calculation of the correlation between the antennas of the antenna terminal.

The correlation test results proposed by the embodiments of the present invention are not only applicable to the correlation investigation of the terminal's uplink transmission, but also can be used for the correlation inspection of the terminal's downlink reception; Using the terminal under test as a receiving device can greatly improve measurement accuracy and test efficiency, that is, compared with using the measured terminal receiving sensitivity as a correlation coefficient calculation parameter, the measurement accuracy and test efficiency can be greatly improved.

In the embodiment of the present invention, there is no need to construct a specific wireless environment, but the spatial channel model defined by the standardization organization is used as a parameter for correlation calculation, so the test method is more accurate and flexible.

Embodiment two

Based on the same inventive concept as the above-mentioned system, Embodiment 2 of the present invention also provides a test method for antenna correlation, which is used to test antenna correlation. The method is applied to at least a base station simulator, a terminal under test, In the test system of the measurement device and the control device, the above-mentioned devices are functional units, which can be further split or combined. For example, the measurement device and the control device can be deployed on the same measurement and control device, which will not be repeated in the embodiments of the present invention.

In the embodiment of the present invention, the terminal under test is located in a full-wave OTA anechoic chamber; the base station simulator, measurement equipment, and control equipment are located outside a full-wave OTA anechoic chamber; The communication antenna establishes a communication link (specifically, the communication antenna is located in the all-wave OTA anechoic chamber, and is connected to the base station simulator outside the full-wave OTA anechoic chamber through a radio frequency cable, and establishes a communication link with the terminal under test through the air interface); the measurement equipment and The receiving antenna located in the full radio wave OTA darkroom is connected (specifically, the receiving antenna is located in the full radio wave OTA darkroom, and is connected to the measuring equipment outside the full radio wave OTA darkroom through a radio frequency cable).

Based on the above networking situation, as shown in Figure 2, the method includes the following steps:

In step 201, the base station emulator configures test parameters for multiple antennas of the terminal under test, and notifies the terminal under test of the test parameters.

Specifically, the base station simulator can establish a communication connection with the terminal under test through the communication antenna, and notify the terminal under test of the test parameters through the communication antenna.

In the embodiment of the present invention, the test parameters include but are not limited to the corresponding working state and transmission power of each antenna, and the corresponding working state of each antenna is on or off; and the base station simulator can configure each Parameters such as the working status and transmit power corresponding to the antenna.

It should be noted that before performing this step and before performing the measurement process, the test system needs to be initialized, including the normal startup of the base station simulator and the measurement equipment, and the correct configuration of initial parameters; after completing the test preparations, start the test. and execute this step.

Step 202, the terminal under test receives test parameters from the base station simulator, and uses the test parameters corresponding to each antenna to send radio frequency signals on each antenna.

Specifically, when the working state corresponding to the antenna is an on state, the terminal under test sends a radio frequency signal on the antenna through the transmit power corresponding to the antenna.

In the embodiment of the present invention, the terminal under test is a wireless device with a multi-antenna system (multi-antennas can be defined as antenna 1, antenna 2, antenna 3...antenna N), and since the terminal under test can communicate with the base station The simulator establishes communication and establishes communication with the measurement equipment, so the terminal under test can receive the test parameters from the base station simulator, and use the test parameters corresponding to each antenna to transmit the radio frequency signal on each antenna by the measurement equipment through the receiving antenna Received.

Step 203, the measuring device receives the radio frequency signal sent by the terminal under test on each antenna, and measures the amplitude and/or phase of the radio frequency signal sent on each antenna (a measuring instrument can be installed inside the measuring device, and the measuring instrument can measure the radio frequency signal measure the magnitude and/or phase of the

Specifically, the measurement device may receive radio frequency signals sent by the terminal under test on each antenna through the receiving antenna.

Step 204, the control device obtains the measurement result of the amplitude and/or phase from the measurement device, and calculates the antenna correlation according to the measurement result of the amplitude and/or phase.

Among them, the control device can receive the measurement result of the amplitude and/or phase from the measurement device, and save the measurement result of the amplitude and/or phase; after that, the control device can perform format processing on the measurement result, and then combine one or more space The channel model parameters, and the correlation between the antennas are calculated using the correlation coefficient formula.

Specifically, based on the measurement results of the amplitude and/or phase, the control device first performs link compensation on the measurement results, and then performs all data of any two antennas (a, b) after compensation (that is, the measurement results, in the form of two Antenna as an example) into the calculation formula of the correlation coefficient:

Discretize the above formula to get:

The result calculated by the above formula is the correlation coefficient of the correlation between the tested terminal antenna a and the antenna b; among them, Pθ(m, n) and Pφ(m, n) are determined by the spatial channel model defined by the standardization organization The meanings of X, θ, E, m, n, P, and φ are the same as those of the prior art, and will not be repeated in the embodiments of the present invention; of course, in practical applications, it is not limited to use the above formula to calculate the antenna correlation, Any theory and formula for correlation evaluation can be applied to the embodiment of the present invention, and will not be repeated here.

In the embodiment of the present invention, the control device can also synchronize and accurately control other devices (such as base station simulators and measurement devices) other than the terminal under test according to the test script.

Specifically, the control device instructs the base station simulator to notify the terminal under test of the test parameters, and the base station simulator notifies the terminal under test of the test parameters according to the instruction of the control device; The radio frequency signal sent by the terminal under test on each antenna is received by the measuring device according to the instructions of the control device.

It should be noted that in order to obtain comprehensive and complete information on the multi-antenna system of the terminal under test, it is necessary to collect test data in three dimensions in the all-wave OTA anechoic chamber for the terminal under test. Therefore, the test system also includes a turntable controller located outside the full-wave OTA anechoic chamber and a turntable (a three-dimensional turntable) located inside the full-wave OTA anechoic chamber, and the terminal under test is located on the turntable.

Based on this, the control device also needs to instruct the turntable controller to control the turntable to reach the designated position. The turntable controller controls the turntable to reach the designated position according to the instructions of the control device, and the terminal under test on the turntable uses the antenna corresponding to each antenna at the designated position. Test parameters Send RF signals on each antenna.

Further, in order to achieve synchronization and precise control, the control device instructs the turntable controller to control the turntable to reach the designated position, and the turntable controller controls the turntable to reach the designated position according to the instructions of the control device; and instructs the base station simulator to notify the terminal under test of the test parameters , the base station emulator notifies the terminal under test of the test parameters (the terminal under test is required to send radio frequency signals at the maximum transmission power all the time); The receiving antenna receives the radio frequency signal sent by the terminal under test on each antenna, and performs amplitude and/or phase measurement.

In the embodiment of the present invention, for the multiple antennas of the terminal under test, specifically: the base station simulator sends an instruction or through the hardware switching of the terminal under test, the terminal under test is set to use antenna 1 as the transmitting antenna, and at the same time, the terminal under test is turned off other antennas of the terminal under test, through the above process, the control device obtains the measurement results of the amplitude and/or phase of antenna 1; after that, the base station emulator issues instructions or switches the terminal under test to set the terminal under test to use Antenna n (2≤n≤N) is used as the transmitting antenna, and other antennas of the terminal under test are turned off at the same time. Through the above process, the control device obtains the measurement results of the amplitude and/or phase of antenna n until the test of all N antennas is completed ; Afterwards, the control device can calculate the antenna correlation according to the measurement results of the amplitude and/or phase of each antenna.

In the embodiment of the present invention, for multiple measurement positions of the terminal under test, in order to comprehensively investigate all radio frequency signals transmitted by the terminal under test, it is necessary to collect and measure the radio frequency signals of the terminal under test in three-dimensional space; specifically, the control device Send an instruction to the turntable controller, the turntable controller controls the turntable to rotate to the next position, and the control device obtains the measurement results of the amplitude and/or phase of each antenna at this position; until all the positions that need to be tested are completed, the acquisition is completed The emission characteristics of the terminal under test in three-dimensional space, so that the control device can calculate the antenna correlation according to the measurement results of the corresponding amplitude and/or phase of each antenna at each position.

To sum up, in the embodiment of the present invention, by measuring the radio frequency signals sent by the terminal under test through each antenna, and using the measurement results to calculate the antenna correlation, there is no need to modify the terminal under test, and it can be comprehensively , Completely and accurately measure the correlation index between multiple antennas of the terminal under test, and can greatly improve the measurement accuracy and test efficiency.

Specifically, in the embodiment of the present invention, the terminal under test is used as the transmitting device, and the terminal under test only needs to establish a communication link with the base station simulator to perform normal communication. Transformation (no need to modify the chip, radio frequency, etc. of the terminal under test, and terminals with multi-antenna transmission functions that meet the requirements of the communication protocol can be used), to ensure the accuracy and fairness of the test results, and to complete multiple antennas accurately and efficiently. Calculation of the correlation between the antennas of the antenna terminal.

The correlation test results proposed by the embodiments of the present invention are not only applicable to the correlation investigation of the terminal's uplink transmission, but also can be used for the correlation inspection of the terminal's downlink reception; Using the terminal under test as a receiving device can greatly improve measurement accuracy and test efficiency, that is, compared with using the measured terminal receiving sensitivity as a correlation coefficient calculation parameter, the measurement accuracy and test efficiency can be greatly improved.

In the embodiment of the present invention, there is no need to construct a specific wireless environment, but the spatial channel model defined by the standardization organization is used as a parameter for correlation calculation, so the test method is more accurate and flexible.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the modules or processes in the drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, or can be located in one or more devices different from the embodiment according to corresponding changes. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (10)

1. A test system, characterized in that, comprising: A base station simulator, configured to configure test parameters for multiple antennas of the terminal under test, and notify the terminal under test of the test parameters; The terminal under test is used to receive test parameters from the base station simulator, and use the test parameters corresponding to each antenna to send radio frequency signals on each antenna; A measuring device, configured to receive radio frequency signals sent by the terminal under test on each antenna, and measure the amplitude and/or phase of the radio frequency signals sent on each antenna; a control device, configured to obtain the measurement result of the amplitude and/or phase from the measurement device, and calculate antenna correlation according to the measurement result of the amplitude and/or phase; Wherein, the test parameters include the corresponding working state and transmission power of each antenna, and the corresponding working state of each antenna is an on state or an off state; The terminal under test is specifically configured to send a radio frequency signal on the antenna by using the transmit power corresponding to the antenna when the working state corresponding to the antenna is in the on state. 2. The system according to claim 1, wherein the terminal under test is located in a full-wave OTA anechoic chamber; The base station simulator, the measurement equipment and the control equipment are located outside the all-wave OTA anechoic chamber; A communication link is established between the terminal under test and the base station simulator through a communication antenna located in the all-wave OTA anechoic chamber; The measuring equipment is connected with the receiving antenna located in the all-wave OTA anechoic chamber. 3. The system of claim 2, wherein: The base station simulator is specifically used to notify the terminal under test of the test parameters through the communication antenna; The measuring device is specifically configured to receive radio frequency signals sent by the terminal under test on each antenna through the receiving antenna. 4. The system of claim 1, wherein: The control device is further configured to instruct the base station emulator to notify the terminal under test of the test parameters; and, Instructing the measurement device to receive radio frequency signals sent by the terminal under test on each antenna. 5. The system according to claim 1 or 4, further comprising a turntable controller positioned outside the full radio OTA anechoic chamber and a turntable positioned within the full radio OTA anechoic chamber, and the terminal under test is located in the on the turntable; The control device is also used to instruct the turntable controller to control the turntable to a designated position; The turntable controller is configured to control the turntable to reach a designated position according to the instruction, and the terminal under test located on the turntable uses the test parameters corresponding to each antenna to send the test parameters on each antenna at the designated position RF signal. 6. A test method for antenna correlation, comprising: The base station simulator configures test parameters for multiple antennas of the terminal under test, and notifies the terminal under test of the test parameters; The terminal under test receives test parameters from the base station simulator, and uses the test parameters corresponding to each antenna to send radio frequency signals on each antenna; The measuring device receives the radio frequency signal sent by the terminal under test on each antenna, and measures the amplitude and/or phase of the radio frequency signal sent on each antenna; The control device obtains the measurement result of the amplitude and/or phase from the measurement device, and calculates the antenna correlation according to the measurement result of the amplitude and/or phase; Wherein, the test parameters include the corresponding working state and transmission power of each antenna, and the corresponding working state of each antenna is an on state or an off state; The terminal under test uses the test parameters corresponding to each antenna to send radio frequency signals on each antenna, including: when the terminal under test is in the open state corresponding to the antenna, transmit power corresponding to the antenna on the antenna send radio frequency signals. 7. The method according to claim 6, wherein the terminal under test is located in a full-wave OTA anechoic chamber; The base station simulator, the measurement equipment and the control equipment are located outside the all-wave OTA anechoic chamber; A communication link is established between the terminal under test and the base station simulator through a communication antenna located in the all-wave OTA anechoic chamber; The measuring equipment is connected with the receiving antenna located in the all-wave OTA anechoic chamber. 8. The method of claim 7, wherein, The base station simulator notifying the tested terminal of the test parameters includes: the base station simulator notifying the tested terminal of the test parameters through the communication antenna; The measuring device receiving the radio frequency signal sent by the terminal under test on each antenna includes: the measuring device receiving the radio frequency signal sent by the terminal under test on each antenna through the receiving antenna. 9. The method of claim 6, further comprising: The control device instructs the base station emulator to notify the terminal under test of the test parameters, and the base station emulator notifies the terminal under test of the test parameters according to the instruction of the control device; and , The control device instructs the measurement device to receive the radio frequency signal sent by the terminal under test on each antenna, and the measurement device receives the radio frequency signal sent by the terminal under test on each antenna according to the instruction of the control device . 10. The method of claim 6 or 9, further comprising: The control device instructs the turntable controller to control the turntable to reach a designated position, the turntable controller is located outside the full radio wave OTA anechoic chamber, the turntable is located in the full radio wave OTA anechoic chamber, and the terminal under test is located on the turntable ; The turntable controller controls the turntable to arrive at a designated position according to the instruction of the control device, and the terminal under test located on the turntable uses the test parameters corresponding to each antenna to transmit on each antenna at the designated position RF signal.