Intelligent networked vehicle whole vehicle MIMO OTA performance testing device and method

Abstract

The application provides a device and method for testing MIMO OTA performance of an intelligent connected vehicle, the device comprising: a full-wave anechoic chamber for eliminating reflection of a wireless signal and constructing a free-space reflection-free test environment; a plurality of millimeter-wave spherical antenna arrays horizontally distributed for generating wireless channel environments of different application scenarios in a test area, and performing MIMO OTA performance measurement on an equivalent scaled model of a vehicle to be tested at an equivalent millimeter-wave test frequency; an antenna sliding rail for adjusting a position of the millimeter-wave spherical antenna array during the test; a single-probe millimeter-wave measurement antenna on the top of the anechoic chamber and vertically directed to the equivalent scaled model of the vehicle to be tested on a test turntable, and performing SISO OTA performance measurement on the equivalent scaled model of the vehicle to be tested at the equivalent millimeter-wave test frequency; and the test turntable for bearing and rotating the equivalent scaled model of the vehicle to be tested during the test, so as to realize whole-vehicle performance measurement of the vehicle to be tested at different attitudes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication testing, and in particular to a device and method for testing the MIMO OTA performance of an intelligent connected vehicle. BACKGROUND

[0002] This section is intended to provide background or context to the embodiments of the application recited in the claims. The description herein does not constitute admission that the prior art is prior art nor does it constitute an admission of any description in this section as prior art to an application described herein and / or in this section.

[0003] With the advent of autonomous vehicles and intelligent connected vehicles and the increasing popularity of in-vehicle infotainment devices, more and more vehicles begin to use wireless technology to achieve vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) and vehicle-to-network (V2N) connections. Under this technical trend, modern vehicles are increasingly like a wireless technology center integrating a series of in-vehicle wireless communication technologies and various transmission systems, and the demand for reliable communication links becomes urgent. Therefore, how to ensure the absolute reliability of wireless connection before the vehicle is put on the market is a crucial problem.

[0004] After the wireless communication antenna and module are installed on the vehicle, their performance is affected by the installation of the vehicle body and the actual use environment of the whole vehicle. The performance test results of the single-body antenna and module before installation cannot truly reflect the differences in the wireless communication performance of the whole vehicle after installation. Therefore, testing the wireless communication performance of the vehicle under the actual working environment of the whole vehicle to ensure that it meets the performance requirements of various performance indicators under the real use environment is an indispensable link in the future testing of the wireless communication performance of the whole vehicle.

[0005] For the measurement of the MIMO OTA performance of the whole vehicle, the existing scheme is to park the vehicle to be tested at the center of a turntable in a full-wave anechoic chamber, to construct different wireless communication channel environments in the test area through a two-dimensional antenna probe ring distributed horizontally, and to measure the MIMO OTA performance of the whole vehicle at the actual working frequency of the vehicle-mounted wireless communication system. In order to ensure the construction accuracy of the channel environment in the test area, the test distance needs to meet the equivalent far-field condition of the whole vehicle, that is, the radius of the horizontal probe ring must be greater than the equivalent far-field distance of the whole vehicle. This scheme has high test accuracy and test consistency for the measurement of the MIMO OTA performance of the whole vehicle. However, this test method has at least the following disadvantages:

[0006] 1. At the typical working frequency of the vehicle-mounted wireless communication system (below 6 GHz), the equivalent far-field distance of the whole vehicle is large, generally more than 10 meters, which will result in a large anechoic chamber size and system construction cost;

[0007] 2. For vehicle-level testing, the parking and placement of the vehicle under test requires a special lifting platform and slide rails, making the system structure complex.

[0008] 3. For whole-vehicle level testing, the process of parking and arranging the vehicle under test is complicated and the testing efficiency is low.

[0009] 4. The fixed horizontal probe ring can only generate a limited number of channel scenarios, which greatly limits the test system's ability to simulate the real wireless channel environment experienced by the vehicle under test, thus limiting the system's scope of use and flexibility.

[0010] 5. It can only perform whole-vehicle MIMO OTA performance measurement, and cannot simultaneously measure whole-vehicle SISO OTA performance and vehicle millimeter-wave radar performance, so the system has limited functionality.

[0011] In existing technologies, another testing method has been proposed, primarily employing a traditional conduction-based detection approach. This method measures MIMO OTA performance at the antenna port of the vehicle under test (VUTC): a calibrated and standardized wireless communication signal is modulated by a channel simulator and injected into the VUTC antenna port. By setting the channel parameters of the channel simulator, different channel models are generated to evaluate the VUTC's MIMO OTA performance. This method is simple, easy to implement, and offers good test consistency, eliminating the need for complex testing equipment such as microwave anechoic chambers or vehicle turntables. However, this testing method has at least the following drawbacks:

[0012] 1. The vehicle under test must have an independent antenna port for applying test signals and measuring MIMO OTA performance;

[0013] 2. The impact of the vehicle's antenna on system performance and the blocking effect of the vehicle on wireless signals were not considered.

[0014] 3. The conduction-based measurement method cannot simulate the impact of the signal angle of arrival on the MIMO OTA performance of the whole vehicle, and cannot truly measure the MIMO OTA performance of the intelligent connected vehicle under test in a typical wireless communication channel environment.

[0015] In summary, there is an urgent need for a technical solution that can overcome the above-mentioned shortcomings and improve the performance testing of MIMO OTA for intelligent connected vehicles. Summary of the Invention

[0016] To address the problems existing in the prior art, this invention proposes a device and method for testing the MIMO OTA performance of intelligent connected vehicles.

[0017] In a first aspect of the embodiments of the present application, an intelligent connected vehicle whole vehicle MIMO OTA performance testing device is provided, comprising: a full-wave anechoic chamber, a plurality of sets of millimeter wave spherical antenna arrays, antenna sliding rails, single-probe millimeter wave measurement antennas and a test turntable located in the full-wave anechoic chamber;

[0018] The full-wave anechoic chamber is used to eliminate the reflection of wireless signals and construct a free space reflection-free test environment.

[0019] The plurality of sets of millimeter wave spherical antenna arrays are horizontally distributed; each set of millimeter wave spherical antenna array comprises a plurality of millimeter wave dual-polarization measurement antennas; the millimeter wave spherical antenna array is used to generate a wireless channel environment of different application scenarios in the test area and perform MIMO OTA performance measurement on the equivalent scaled model of the vehicle to be tested at an equivalent millimeter wave test frequency band.

[0020] The antenna sliding rails are used to carry the millimeter wave spherical antenna array and adjust the position of the millimeter wave spherical antenna array according to the requirements of the channel model to be tested during testing.

[0021] The single-probe millimeter wave measurement antenna is installed on the top of the full-wave anechoic chamber and is normally directed to the equivalent scaled model of the vehicle to be tested on the test turntable, and is used to perform SISO OTA performance measurement on the equivalent scaled model of the vehicle to be tested at an equivalent millimeter wave test frequency band.

[0022] The test turntable is used to carry and drive the equivalent scaled model of the vehicle to be tested to rotate during testing, so as to realize whole vehicle MIMO / SISO OTA performance measurement of the vehicle to be tested in different postures.

[0023] In a second aspect of the embodiments of the present application, an intelligent connected vehicle whole vehicle MIMO OTA performance testing method is provided, which is executed based on the intelligent connected vehicle whole vehicle MIMO OTA performance testing device; comprising:

[0024] Different wireless channel environments are constructed by the horizontally distributed plurality of sets of millimeter wave spherical antenna arrays, and MIMO OTA performance measurement is performed on the equivalent scaled model of the vehicle to be tested at an equivalent millimeter wave test frequency band.

[0025] SISO OTA performance measurement is performed on the equivalent scaled model of the vehicle to be tested at an equivalent millimeter wave test frequency band by the single-probe millimeter wave measurement antenna.

[0026] According to the measurement results, the whole vehicle MIMO / SISO OTA performance of the vehicle to be tested at a real working frequency is obtained.

[0027] The intelligent connected vehicle MIMO OTA performance testing device and method provided by the application can construct different wireless channel environments through a plurality of horizontally distributed millimeter wave spherical antenna arrays, perform MIMO OTA performance measurement on an equivalent scaled model of the vehicle to be tested at an equivalent millimeter wave test frequency, perform SISO OTA performance measurement on the equivalent scaled model of the vehicle to be tested at the equivalent millimeter wave test frequency by using a single-probe millimeter wave measurement antenna, and calculate the MIMO / SISO OTA performance of the vehicle to be tested at a real working frequency, so that the intelligent connected vehicle MIMO / SISO OTA performance measurement can be quickly, efficiently and accurately completed, the construction and testing costs of the darkroom can be greatly reduced, and favorable hardware and technical support is provided for the testing of the wireless communication performance of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 is an intelligent connected vehicle MIMO OTA performance testing device architecture schematic diagram of an embodiment of the present application.

[0030] Figure 2 is an intelligent connected vehicle MIMO OTA performance testing device architecture schematic diagram of another embodiment of the present application.

[0031] Figure 3 is a relationship schematic diagram of a millimeter wave spherical antenna array and a millimeter wave dual-polarization measurement antenna of an embodiment of the present application.

[0032] Figure 4 is a top view schematic diagram of eight millimeter wave spherical antenna arrays of an embodiment of the present application.

[0033] Figure 5 is an intelligent connected vehicle MIMO OTA performance testing method flowchart schematic diagram of an embodiment of the present application.

[0034] Figure 6 is an intelligent connected vehicle MIMO OTA performance testing method flowchart schematic diagram of another embodiment of the present application.

[0035] Figure 7 is a computer device structure schematic diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0036] The principles and spirits of the present application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present application, and in no way limit the scope of the present application. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0037] Those skilled in the art know that the embodiments of the present application can be implemented as a system, device, apparatus, method or computer program product. Therefore, the present disclosure can be embodied in the form of entire hardware, entire software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0038] According to the embodiments of the present application, an intelligent connected vehicle whole vehicle MIMO OTA performance testing device and method are proposed, relating to the technical field of wireless communication testing.

[0039] The principles and spirits of the present application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present application, and in no way limit the scope of the present application. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] Figure 1 is the schematic diagram of the intelligent connected vehicle whole vehicle MIMO OTA performance testing device of an embodiment of the present application. As shown in Figure 1 , the device comprises:

[0041] The full-wave anechoic chamber 110, a plurality of sets of millimeter wave spherical antenna arrays 120, antenna sliding rails 130, single-probe millimeter wave measurement antennas 140 and a test turntable 150 located in the full-wave anechoic chamber 110;

[0042] The full-wave anechoic chamber 110 is used to eliminate the reflection of wireless signals and construct a free space reflection-free test environment;

[0043] The plurality of sets of millimeter wave spherical antenna arrays 120 are horizontally distributed; each set of millimeter wave spherical antenna arrays 120 comprises a plurality of millimeter wave dual-polarization measurement antennas 160; the millimeter wave spherical antenna arrays 120 are used to generate wireless channel environments of different application scenarios in the test area, and perform MIMO OTA performance measurement on the equivalent scaled-down model 170 of the vehicle to be tested in the equivalent millimeter wave test frequency band;

[0044] The antenna sliding rails 130 are used to carry the millimeter wave spherical antenna arrays 120, and adjust the positions of the millimeter wave spherical antenna arrays 120 according to the requirements of the channel model to be tested during testing;

[0045] The single-probe millimeter wave measurement antenna 140 is installed on the top of the full-wave darkroom 110, is normally directed to the equivalent scaled model 170 of the vehicle to be tested on the test turntable 150, and performs SISO OTA performance measurement on the equivalent scaled model 170 of the vehicle to be tested in an equivalent millimeter wave test frequency band;

[0046] The test turntable 150 is used to carry and drive the equivalent scaled model 170 of the vehicle to be tested to rotate during the test, so as to realize whole-vehicle MIMO / SISO OTA performance measurement of the vehicle to be tested in different postures.

[0047] In an embodiment, the test turntable 150 is a multi-axis turntable, and the number of axes can be at least 3, so as to at least realize rotation of an azimuth plane and a pitch plane, lifting of a height, and accurate adjustment of a horizontal installation position.

[0048] The test turntable 150 at least includes a combined-axis state and a distributed-axis state; for example, Figure 1 and Figure 2 , Figure 1 The test turntable 150 in the combined-axis state is in the distributed-axis state, Figure 2 The test turntable 150 in the distributed-axis state is in the combined-axis state.

[0049] According to the rotation requirement of the equivalent scaled model 170 of the vehicle to be tested under different test scenes, the state of the test turntable 150 is adjusted;

[0050] When SISO OTA test is performed, the test turntable 150 is switched to the combined-axis state, so as to drive the equivalent scaled model 170 of the vehicle to be tested to rotate in three dimensions (theta: 0-180°, phi: 0-360°);

[0051] When MIMO OTA test is performed, the test turntable 150 is switched to the distributed-axis state, so as to drive the equivalent scaled model 170 of the vehicle to be tested to rotate in two dimensions (phi: 0-360°) in a horizontal plane.

[0052] In an embodiment, when SISO OTA performance measurement is performed, passive antenna pattern test and active radiation power and receiving sensitivity characteristic test are realized in a single-probe far-field test manner, and passive pattern characteristic test is realized in a single-probe spherical near-field manner.

[0053] In an embodiment, the sphere center of the millimeter wave spherical antenna array 120 coincides with the origin 180 of the test device coordinate system, the azimuth plane (horizontal plane) spherical angle is 10° / 15°, and the pitch plane (vertical plane) spherical angle is 60° (the pitch plane is centered on the horizontal plane (90°), ±30°).

[0054] The origin 180 of the test device coordinate system is the center point of the test turntable 150. The test system coordinate system is established with the center point of the test turntable 150 as the origin of the test device coordinate system, the plane parallel to the ground as the XY plane, and the axis perpendicular to the XY plane and pointing upwards towards the ground as the positive Z-axis.

[0055] The number of millimeter-wave spherical antenna arrays 120 ranges from 8 to 24.

[0056] In practical applications, the azimuth angle of the millimeter-wave spherical antenna array 120 is usually determined based on the number of arrays. Specifically, if the number is 8 to 12, an azimuth angle of 10° or 15° can be selected; if the number is greater than 12 (maximum 24), an azimuth angle of 10° is generally selected.

[0057] refer to Figure 3 As shown, the millimeter-wave spherical antenna array 120 is composed of multiple millimeter-wave dual-polarized measurement antennas 160 evenly distributed in 5° steps; that is, the elevation spherical angle of the millimeter-wave spherical antenna array 120 is 60°, and 13 millimeter-wave dual-polarized measurement antennas are evenly distributed in 5° steps on each column.

[0058] During testing, (e.g.) Figure 1 The radius of the millimeter-wave spherical antenna array 120 (as shown) and the distance from the single-probe millimeter-wave measurement antenna 140 to the origin 180 of the test device coordinate system shall not be less than 4m.

[0059] In one embodiment, the test turntable 150 is also used to carry the vehicle-mounted millimeter-wave radar under test;

[0060] The millimeter-wave spherical antenna array 120 can also be modularly assembled into multiple spherical antenna walls by combining multiple millimeter-wave spherical antenna arrays 120; the spherical antenna wall can be considered as a spherical antenna array with a large azimuth angle.

[0061] The spherical antenna wall is used to perform performance testing on the vehicle-mounted millimeter-wave radar under test at actual operating frequencies (76-81GHz). This invention can accommodate multiple performance tests, has diverse functions, strong versatility, and can improve testing efficiency.

[0062] refer to Figure 4As shown, an exemplary diagram illustrates the relationship of eight millimeter-wave spherical antenna arrays from a top-down perspective. The azimuth angle of the millimeter-wave spherical antenna array 120 is 15°, and the antenna rail 130 is a circular track laid on the ground, the center of which coincides with the projection of the origin 180 of the test device coordinate system onto the ground. The position of the millimeter-wave spherical antenna array 120 on the horizontal plane can be dynamically adjusted on the antenna rail 130 according to the characteristics of the channel model under test. In one embodiment, the equivalent scaled-down model 170 of the vehicle under test is obtained by proportionally reducing the size of the vehicle under test and the vehicle-mounted antenna.

[0063] The equivalent millimeter-wave test frequency band corresponds to the size of the equivalent scaled-down model of the vehicle under test, obtained using the following relationship:

[0064]

[0065] Among them, f M For the equivalent millimeter-wave test frequency band; S M f represents the dimensions of the equivalent scaled-down model of the vehicle under test; F S is the operating frequency of the vehicle-mounted wireless communication module of the vehicle under test; F The actual dimensions of the vehicle to be tested;

[0066] The equivalent millimeter-wave test frequency is no less than 20 GHz and no more than 85 GHz.

[0067] For example, for a vehicle under test with a length of 5m and its onboard wireless communication module operating in the 1GHz band, when the equivalent test frequency is set to 25GHz, the size of the equivalent scaled-down model of the entire vehicle will be reduced to 0.2m. Measurements are then performed on the 0.2m scaled-down model of the vehicle under test at the 25GHz equivalent test frequency, and the wireless communication performance indicators (1GHz) of the actual vehicle under test (5m in length) are calculated. This method significantly reduces the requirements for the size and construction cost of the anechoic chamber.

[0068] Having described the apparatus according to exemplary embodiments of the present invention, the following references are made to... Figure 5 and Figure 6 This paper introduces a method for testing the MIMO OTA performance of intelligent connected vehicles according to an exemplary embodiment of the present invention.

[0069] Based on the same inventive concept, this invention also proposes a method for testing the MIMO OTA performance of intelligent connected vehicles, such as... Figure 5 As shown, this method is executed based on the intelligent connected vehicle MIMO OTA performance testing device; it includes:

[0070] S501, constructing different wireless channel environments by horizontally distributed multiple groups of millimeter wave spherical antenna arrays, and performing MIMO OTA performance measurement on the equivalent scaled-down model of the vehicle to be measured at an equivalent millimeter wave test frequency band;

[0071] S502, performing SISO OTA performance measurement on the equivalent scaled-down model of the vehicle to be measured at an equivalent millimeter wave test frequency band by a single-probe millimeter wave measurement antenna;

[0072] S503, obtaining the MIMO / SISO OTA performance of the vehicle to be measured at a real working frequency according to the measurement results.

[0073] In another embodiment, referring to Figure 6 , the method further comprises:

[0074] S601, combining and splicing multiple millimeter wave spherical antenna arrays into multiple spherical antenna walls in a modular manner;

[0075] S602, performing performance test on the vehicle-mounted millimeter wave radar to be measured at a real working frequency by the spherical antenna wall.

[0076] It should be noted that although the operations of the method of the present application are described in a specific order in the above embodiments and drawings, this does not require or imply that the operations must be performed in this specific order, or that all of the shown operations must be performed to achieve the desired results. Additionally or alternatively, certain steps can be omitted, multiple steps can be combined into one step, and / or one step can be divided into multiple steps.

[0077] Based on the foregoing inventive concept, as Figure 7 shown, the present application further proposes a computer device 700 comprising a memory 710, a processor 720, and a computer program 730 stored on the memory 710 and executable on the processor 720, wherein the processor 720 implements the foregoing intelligent connected vehicle MIMO OTA performance test method when executing the computer program 730.

[0078] Based on the foregoing inventive concept, the present application proposes a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to implement the foregoing intelligent connected vehicle MIMO OTA performance test method.

[0079] Based on the foregoing inventive concept, the present application proposes a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to implement the intelligent connected vehicle MIMO OTA performance test method.

[0080] The intelligent connected vehicle whole vehicle MIMO OTA performance testing device and method provided by the application constructs different to-be-tested wireless channel environments through horizontally distributed multiple sets of millimeter wave spherical antenna arrays, performs MIMO OTA performance measurement on an equivalent scaled-down model of the to-be-tested vehicle at an equivalent millimeter wave test frequency, performs SISO OTA performance measurement on the equivalent scaled-down model of the to-be-tested vehicle at the equivalent millimeter wave test frequency by using a single-probe millimeter wave measurement antenna, and calculates the whole vehicle MIMO / SISO OTA performance of the to-be-tested vehicle at a real working frequency, so that the overall scheme can quickly, efficiently and accurately complete the intelligent connected vehicle whole vehicle MIMO / SISO OTA performance measurement, greatly reduces the construction and test cost of an anechoic chamber, and provides favorable hardware support and technical support for the test of the wireless communication performance of the vehicle.

[0081] Those skilled in the art will appreciate that embodiments of the application can be provided as methods, apparatus, or computer program products. Accordingly, the application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) embodying computer-readable program code.

[0082] The application is described with reference to flowcharts and / or block diagrams of methods and computer program products according to embodiments of the application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce an apparatus that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 An apparatus that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 An apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0083] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 An apparatus that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 An apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0084] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The flowchart blocks Figure 1 The flowchart blocks

[0085] Finally, it should be noted that the above-described embodiments are merely exemplary of the application and should not be used to limit its scope, and that the scope of the application is defined by the appended claims. Although the application has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations as fall within the scope of the claims appended hereto.

Claims

1. An intelligent networked vehicle whole vehicle MIMO OTA performance testing device, characterized in that, The application relates to a test device for vehicle millimeter wave radar, which comprises the following parts: a full-wave anechoic chamber, a plurality of millimeter wave spherical antenna arrays, antenna sliding rails, single-probe millimeter wave measuring antennas and a test turntable in the full-wave anechoic chamber; the full-wave anechoic chamber is used for eliminating the reflection of wireless signals and constructing a free-space non-reflection test environment; the plurality of millimeter wave spherical antenna arrays are horizontally distributed; each millimeter wave spherical antenna array comprises a plurality of millimeter wave dual-polarization measuring antennas; the millimeter wave spherical antenna array is used for generating a wireless channel environment of different application scenes in a test area and performing MIMO OTA performance measurement on an equivalent scaled model of a to-be-tested vehicle in an equivalent millimeter wave test frequency band; the antenna sliding rails are used for bearing the millimeter wave spherical antenna arrays and adjusting the positions of the millimeter wave spherical antenna arrays according to the requirements of a to-be-tested channel model during the test; the single-probe millimeter wave measuring antennas are installed on the top of the full-wave anechoic chamber and are normally directed to the equivalent scaled model of the to-be-tested vehicle on the test turntable, so that SISO OTA performance measurement is performed on the equivalent scaled model of the to-be-tested vehicle in the equivalent millimeter wave test frequency band; the test turntable is used for bearing and driving the equivalent scaled model of the to-be-tested vehicle to rotate during the test, so that the whole vehicle MIMO / SISO OTA performance measurement of the to-be-tested vehicle in different postures is realized; wherein the spherical center of the millimeter wave spherical antenna array is coincident with the origin of the test device coordinate system, and the spherical angle is 10 DEG / 15 DEG in the azimuth plane and 60 DEG in the elevation plane; the origin of the test device coordinate system is the center point of the table surface of the test turntable; the number of the millimeter wave spherical antenna arrays is 8-24; the millimeter wave spherical antenna arrays are uniformly distributed by a plurality of millimeter wave dual-polarization measuring antennas with a 5 DEG step; during the test, the radius of the millimeter wave spherical antenna array and the distance from the single-probe millimeter wave measuring antenna to the origin of the test device coordinate system are not less than 4 m; wherein the test turntable is also used for bearing a to-be-tested vehicle millimeter wave radar; the millimeter wave spherical antenna array can also be combined and spliced into a plurality of spherical antenna walls in a modular manner; the spherical antenna wall is used for performing performance test on the to-be-tested vehicle millimeter wave radar under the actual working frequency.

2. The apparatus of claim 1, wherein, The antenna sliding rails are circular tracks laid on the ground, and the center of the circular track is coincident with the projection of the origin of the test device coordinate system on the ground.

3. The apparatus of claim 1, wherein, The equivalent scaled model of the to-be-tested vehicle is obtained by proportionally reducing the size of the to-be-tested vehicle and the vehicle antenna.

4. The apparatus of claim 1, wherein, The equivalent millimeter wave test frequency band corresponds to the size of the equivalent scaled model of the to-be-tested vehicle and is obtained by using the following relationship: ； wherein, is an equivalent millimeter wave test frequency band; is a size of an equivalent scaled model of the vehicle under test; is an operating frequency of a vehicle-mounted wireless communication module of the vehicle under test; is a real size of the vehicle under test; the equivalent millimeter wave test frequency is not less than 20 GHz and not more than 85 GHz.

5. The apparatus of claim 1, wherein, The test turntable at least comprises a combined shaft state and a distributed shaft state; the state of the test turntable is adjusted according to the rotation requirement of the equivalent scaled model of the to-be-tested vehicle under different test scenes; wherein the combined shaft state is switched to when SISO OTA test is performed, so that the equivalent scaled model of the to-be-tested vehicle can be driven to rotate in three dimensions; the distributed shaft state is switched to when MIMO OTA test is performed, so that the equivalent scaled model of the to-be-tested vehicle can be driven to rotate in two dimensions in the horizontal plane. 6.A method for testing intelligent connected vehicle MIMO OTA performance, characterized in that, The method is executed based on the intelligent connected vehicle whole vehicle MIMO OTA performance testing device of any one of claims 1-5; comprising: Different wireless channel environments are constructed through horizontally distributed multiple groups of millimeter wave spherical antenna arrays, and MIMO OTA performance measurement is performed on the equivalent scaled model of the vehicle under test in the equivalent millimeter wave test frequency band; SISO OTA performance measurement is performed on the equivalent scaled model of the vehicle under test in the equivalent millimeter wave test frequency band through a single-probe millimeter wave measurement antenna; According to the measurement results, the MIMO / SISO OTA performance of the vehicle under test at the real working frequency is obtained; In a modular manner, multiple millimeter wave spherical antenna arrays are combined and spliced into multiple spherical antenna walls; Through the spherical antenna wall, performance testing is performed on the vehicle-mounted millimeter wave radar under the real working frequency.

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