CN116318461A - Intelligent network-connected whole automobile MIMO OTA performance testing device and method - Google Patents

Intelligent network-connected whole automobile MIMO OTA performance testing device and method Download PDF

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CN116318461A
CN116318461A CN202310150780.7A CN202310150780A CN116318461A CN 116318461 A CN116318461 A CN 116318461A CN 202310150780 A CN202310150780 A CN 202310150780A CN 116318461 A CN116318461 A CN 116318461A
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millimeter wave
vehicle
test
tested
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孙思扬
刘先会
张帅
陈磊
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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  • Spectroscopy & Molecular Physics (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The invention provides an intelligent network-connected whole automobile MIMO OTA performance testing device and method, wherein the device comprises the following steps: the full anechoic chamber is used for eliminating the reflection of wireless signals and constructing a free space reflection-free test environment; the multiple groups of millimeter wave spherical antenna arrays are horizontally distributed and used for generating wireless channel environments of different application scenes in a test area, and MIMO OTA performance measurement is carried out on an equivalent scaling model of a vehicle to be tested in an equivalent millimeter wave test frequency band; the antenna slide rail is used for adjusting the position of the millimeter wave spherical antenna array during testing; the normal direction of a single probe millimeter wave measuring antenna at the top of the darkroom points to the equivalent scaling model of the vehicle to be tested, which is positioned on the testing turntable, and SISO OTA performance measurement is carried out on the equivalent scaling model of the vehicle to be tested in an equivalent millimeter wave testing frequency band; the test turntable is used for bearing and driving the equivalent scaling model of the vehicle to be tested to rotate in the test process, so that the whole vehicle performance measurement of the vehicle to be tested under different postures is realized.

Description

Intelligent network-connected whole automobile MIMO OTA performance testing device and method
Technical Field
The invention relates to the technical field of wireless communication testing, in particular to an intelligent network-connected whole automobile MIMO OTA performance testing device and method.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
With the advent of autopilot and intelligent networked automobiles and the increasing popularity of in-vehicle infotainment devices, more and more vehicles began to use wireless technology to implement vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), and vehicle-to-network (V2N) connections in large numbers. With this trend, modern automobiles increasingly resemble a wireless technology center that integrates a series of on-board wireless communication technologies and various transmission systems, and the need for reliable communication links is becoming urgent. Therefore, how to ensure absolute reliability of the wireless connection of the vehicle before it is put on the market is a critical issue.
After loading, the performance of the wireless communication antenna and the wireless communication module is affected by the actual use environment of the installed car body and the whole car. The performance test results of the single-level antenna and the module before loading can not truly reflect the difference of the wireless communication performance of the whole vehicle after loading. Therefore, the wireless communication performance of the vehicle is tested in the actual working environment of the whole vehicle, so that the wireless communication performance meets various performance index requirements in the actual use environment, and the wireless communication performance testing method is an indispensable link in future wireless communication performance testing of the whole vehicle.
For the measurement of the whole vehicle MIMO OTA performance, the existing scheme is that a vehicle to be measured is parked in the center of a turntable in a whole radio wave darkroom, different wireless communication channel environments are built in a test area through two-dimensional antenna probe rings distributed horizontally, and the whole vehicle MIMO OTA performance is measured under the actual working frequency of a 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, namely, the radius of the horizontal probe ring needs to be larger than the equivalent far-field distance of the whole vehicle. The scheme has higher test precision and test consistency for the whole vehicle MIMO OTA performance measurement. However, this test method has at least the following drawbacks:
1. under the working frequency of a typical vehicle-mounted wireless communication system (lower than 6 GHz), the equivalent far-field distance of the whole vehicle is large and is generally more than 10 meters, so that the size of a darkroom and the construction cost of the system can be extremely large;
2. for the test of the whole vehicle level, the parking and placing of the vehicle to be tested requires a special lifting table and a special sliding rail, and the system structure is complex;
3. for the test of the whole vehicle level, the parking and placing process of the vehicle to be tested is complex, and the test efficiency is low;
4. the fixed horizontal probe ring has limited channel scenes, so that the capability of the test system for simulating the real wireless channel environment experienced by the vehicle to be tested is greatly limited, and the use range and flexibility of the system are limited;
5. the system only can measure the performance of the whole vehicle MIMO OTA, but cannot measure the performance of the whole vehicle SISO OTA and the performance of the vehicle millimeter wave radar at the same time, and has single system function.
In the prior art, another testing method is also proposed, mainly adopting a traditional conduction-based detection mode, and completing MIMO OTA performance measurement at an antenna port of a vehicle to be tested: the calibrated and calibrated wireless communication signals are modulated by a channel simulator and injected into an antenna port of the vehicle to be tested. Different channel models are generated by setting channel parameters of the channel simulator and are used for evaluating the MIMO OTA performance of the vehicle to be tested. The method is simple and easy to implement, has good test consistency, and does not need the investment of complex test equipment such as a microwave darkroom, a vehicle turntable and the like. However, this test method has at least the following drawbacks:
1. the vehicle to be tested must have an independent antenna port for application of test signals and measurement of MIMO OTA performance;
2. the influence of the antenna of the vehicle to be tested on the system performance is not considered, and the shielding effect of the vehicle to be tested on the wireless signal is not considered;
3. the conduction-based measurement mode cannot simulate the influence of the arrival angle of the signal on the MIMO OTA performance of the whole vehicle, and cannot truly measure the MIMO OTA performance of the intelligent network-connected vehicle to be measured in a typical wireless communication channel environment.
In view of the above, a technical solution is needed to overcome the above-mentioned drawbacks and improve the performance test of the whole intelligent network-connected car MIMO OTA.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an intelligent network-connected whole automobile MIMO OTA performance testing device and method.
In a first aspect of the embodiment of the present invention, an intelligent network-connected device for testing performance of an entire MIMO OTA of an automobile is provided, including: the full-anechoic chamber is provided with a plurality of groups of millimeter wave spherical antenna arrays, antenna sliding rails, single-probe millimeter wave measuring antennas and a testing turntable which are positioned in the full-anechoic chamber;
the full anechoic chamber is used for eliminating the reflection of wireless signals and constructing a free space reflection-free test environment;
the millimeter wave spherical antenna arrays are horizontally distributed; each millimeter wave spherical antenna array comprises a plurality of millimeter wave dual-polarized measuring antennas; the millimeter wave spherical antenna array is used for generating wireless channel environments of different application scenes in a test area, and performing MIMO OTA performance measurement on an equivalent scaling model of a vehicle to be tested in an equivalent millimeter wave test frequency band;
the antenna slide rail is used for bearing the millimeter wave spherical antenna array and adjusting the position of the millimeter wave spherical antenna array according to the requirement of a channel model to be tested during testing;
the single-probe millimeter wave measuring antenna is arranged at the top of the full-wave darkroom, points to the equivalent scaling model of the vehicle to be measured on the test turntable in the normal direction, and performs SISO OTA performance measurement on the equivalent scaling model of the vehicle to be measured in an equivalent millimeter wave test frequency band;
the test turntable is used for bearing and driving the equivalent scaling model of the vehicle to be tested to rotate in the test process, so that the whole vehicle MIMO/SISO OTA performance measurement of the vehicle to be tested under different postures is realized.
In a second aspect of the embodiment of the invention, a method for testing the performance of the whole vehicle MIMO OTA of the intelligent network-connected automobile is provided, and the method is executed based on a device for testing the performance of the whole vehicle MIMO OTA of the intelligent network-connected automobile; comprising the following steps:
constructing different wireless channel environments through a plurality of groups of millimeter wave spherical antenna arrays which are horizontally distributed, and measuring the MIMO OTA performance of an equivalent scaling model of the vehicle to be tested in an equivalent millimeter wave test frequency band;
performing SISO OTA performance measurement on an equivalent scaling model of the vehicle to be tested in an equivalent millimeter wave test frequency band through a single probe millimeter wave measurement antenna;
and obtaining the MIMO/SISO OTA performance of the whole vehicle to be tested under the real working frequency according to the measurement result.
According to the intelligent network-connected whole-vehicle MIMO OTA performance testing device and method, different wireless channel environments are constructed through a plurality of groups of millimeter wave spherical antenna arrays which are horizontally distributed, and MIMO OTA performance measurement is carried out on an equivalent scaling model of the vehicle to be tested under an equivalent millimeter wave testing frequency; and the single probe millimeter wave measuring antenna is utilized to measure SISO OTA performance of the equivalent scaling model of the vehicle to be measured under the equivalent millimeter wave test frequency, the whole MIMO/SISO OTA performance of the vehicle to be measured under the real working frequency is obtained through calculation, the whole scheme can rapidly, efficiently and accurately finish the intelligent network-connected whole MIMO/SISO OTA performance measurement of the vehicle, the darkroom construction and test cost is greatly reduced, and the beneficial hardware support and technical support are provided for the test of the wireless communication performance of the vehicle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an intelligent network-connected whole-vehicle MIMO OTA performance testing apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an intelligent network-connected whole-vehicle MIMO OTA performance testing apparatus according to another embodiment of the present invention.
Fig. 3 is a schematic diagram of a relationship between a millimeter wave spherical antenna array and a millimeter wave dual-polarized measurement antenna according to an embodiment of the present invention.
Fig. 4 is a schematic top view of an 8 millimeter wave spherical antenna array according to an embodiment of the invention.
Fig. 5 is a flow chart of a method for testing performance of an intelligent network-connected vehicle MIMO OTA according to an embodiment of the present invention.
Fig. 6 is a flow chart of a method for testing performance of an intelligent network-connected vehicle MIMO OTA according to another embodiment of the present invention.
FIG. 7 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are presented merely to enable those skilled in the art to better understand and practice the invention and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Those skilled in the art will appreciate that embodiments of the invention may be implemented as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the following forms, namely: complete hardware, complete software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
According to the embodiment of the invention, an intelligent network-connected whole automobile MIMO OTA performance testing device and method are provided, and the device and method relate to the technical field of wireless communication testing.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments thereof.
Fig. 1 is a schematic diagram of an intelligent network-connected whole-vehicle MIMO OTA performance testing apparatus according to an embodiment of the present invention. As shown in fig. 1, the apparatus includes:
a full anechoic chamber 110, a plurality of groups of millimeter wave spherical antenna arrays 120, antenna sliding rails 130, single-probe millimeter wave measuring antennas 140 and a testing turntable 150 which are positioned in the full anechoic chamber 110;
the full anechoic chamber 110 is used for eliminating the reflection of wireless signals and constructing a free space reflection-free test environment;
multiple groups of millimeter wave spherical antenna arrays 120 are horizontally distributed; each set of millimeter wave spherical antenna arrays 120 includes a plurality of millimeter wave dual-polarized measurement antennas 160; the millimeter wave spherical antenna array 120 is used for generating wireless channel environments of different application scenes in a test area, and performing MIMO OTA performance measurement on an equivalent scaling model 170 of a vehicle to be tested in an equivalent millimeter wave test frequency band;
the antenna sliding rail 130 is used for bearing the millimeter wave spherical antenna array 120, and adjusting the position of the millimeter wave spherical antenna array 120 according to the requirement of a channel model to be tested during testing;
the single-probe millimeter wave measuring antenna 140 is arranged at the top of the full-wave darkroom 110, points to the equivalent scaling model 170 of the vehicle to be measured on the test turntable 150 in the normal direction, and performs SISO OTA performance measurement on the equivalent scaling model 170 of the vehicle to be measured in an equivalent millimeter wave test frequency band;
the test turntable 150 is used for bearing and driving the equivalent scaling model 170 of the vehicle to be tested to rotate in the test process, so as to realize the measurement of the performance of the whole vehicle MIMO/SISO OTA under different postures of the vehicle to be tested.
In one embodiment, the test turret 150 is a multi-axis turret, and the number of axes may be at least 3, enabling at least rotation of azimuth, elevation, and precise adjustment of the horizontal mounting position.
The test turret 150 includes at least a combined axis state and a distributed axis state; referring to fig. 1 and 2, the test turret 150 in fig. 1 is in a distributed axis state, and the test turret 150 in fig. 2 is in a combined axis state.
According to the rotation requirements of the equivalent scaling model 170 of the vehicle to be tested in different test scenes, the state of the test turntable 150 is adjusted;
when SISO OTA test is performed, the test turntable 150 is switched to be in a combined axis state, so that the equivalent scaling model 170 of the vehicle to be tested can be driven to perform three-dimensional rotation (theta: 0-180 degrees, phi:0-360 degrees);
when the MIMO OTA test is performed, the test turntable 150 is switched to be in a distributed axis state, and the equivalent scaling model 170 of the vehicle to be tested can be driven to rotate in two dimensions (phi: 0-360 degrees) on the horizontal plane.
In one embodiment, when SISO OTA performance measurement is performed, a passive antenna pattern test and an active radiation power and receiving sensitivity characteristic test are realized in a single probe far field test mode; and testing passive pattern characteristics in a single-probe spherical near field mode.
In one embodiment, the sphere center of millimeter wave spherical antenna array 120 coincides with testing device coordinate system origin 180, azimuth (horizontal) spherical opening angle is 10 °/15 °, elevation (vertical) spherical opening angle is 60 ° (elevation centered on horizontal (90 °, ±30°);
wherein the testing device coordinate system origin 180 is the table center point of the testing turret 150; taking the table top center point of the test turntable 150 as a coordinate origin of the test device, taking a plane parallel to the ground as an XY plane, and taking an axis perpendicular to the XY plane and facing to the upper part of the ground as a Z-axis forward direction to establish a test system coordinate system;
the number of millimeter wave spherical antenna arrays 120 is 8 to 24.
In an actual application scenario, the azimuth plane spherical opening angle of the corresponding millimeter wave spherical antenna array 120 is generally determined according to the number of millimeter wave spherical antenna arrays 120. Specifically, if the number is 8 to 12, the azimuth angle of the azimuth plane can be selected to be 10 degrees or 15 degrees; if the number is greater than 12 (up to 24), the azimuth angle of 10 ° is generally selected.
Referring to fig. 3, the millimeter wave spherical antenna array 120 is composed of a plurality of millimeter wave dual-polarized measurement antennas 160, which are uniformly distributed in steps of 5 °; that is, the elevation plane spherical opening angle of the millimeter wave spherical antenna array 120 is 60 °, and 13 millimeter wave dual-polarized measurement antennas are uniformly distributed on each column in 5 ° steps.
At the time of testing, the radius of the millimeter wave spherical antenna array 120 (shown in fig. 1) and the distance from the single probe millimeter wave measurement antenna 140 to the origin 180 of the coordinate system of the testing device are not lower than 4m.
In an embodiment, the test turret 150 is further configured to carry the millimeter wave radar to be tested;
the millimeter wave spherical antenna array 120 can also be combined and spliced into a plurality of spherical antenna walls by a plurality of millimeter wave spherical antenna arrays 120 in a modularized mode; the spherical antenna wall may be considered as a spherical antenna array with a large azimuth angle of opening.
The spherical antenna wall is used for performing performance test on the vehicle-mounted millimeter wave radar to be tested at the actual working frequency (76-81 GHz), and the vehicle-mounted millimeter wave radar to be tested can give consideration to various performance tests, has various functions and strong universality and can improve the test efficiency.
Referring to fig. 4, a relationship of 8 millimeter wave spherical antenna arrays in a top view is exemplarily shown. The azimuth angle of the millimeter wave spherical antenna array 120 is 15 degrees, the antenna slide rail 130 is a circular orbit paved on the ground, and the center of the circular orbit coincides with the projection of the origin 180 of the coordinate system of the testing device on the ground. The position of the millimeter wave spherical antenna array 120 on the horizontal plane can be dynamically adjusted on the antenna sliding rail 130 according to the characteristics of the channel model to be measured. In one embodiment, the vehicle equivalent scaling model 170 is obtained by scaling down the dimensions of the vehicle under test and the vehicle antenna.
The equivalent millimeter wave test frequency band corresponds to the size of an equivalent scaling model of the vehicle to be tested, and is obtained by using the following relational expression:
Figure BDA0004090674520000071
wherein f M Is equivalent to a millimeter wave test frequency band; s is S M The dimension of the equivalent scaling model of the vehicle to be measured; f (f) F The working frequency of the vehicle-mounted wireless communication module of the vehicle to be tested is set; s is S F The real size of the vehicle to be tested;
the equivalent millimeter wave test frequency is not lower than 20GHz and not higher than 85GHz.
For example, for a vehicle to be tested with the length of 5m, the vehicle-mounted wireless communication module works in the 1GHz frequency band, and when the equivalent test frequency is set to be 25GHz, the equivalent scaling model size of the whole vehicle is reduced to 0.2m. And measuring an equivalent scaling model of the vehicle to be measured with the length of 0.2m under the 25GHz equivalent test frequency, and calculating to obtain the wireless communication performance index (1 GHz) of the real vehicle to be measured (with the length of 5 m). Through the mode, the requirements on the field size and the construction cost of the darkroom can be greatly reduced.
Having described the apparatus of the exemplary embodiments of the present invention, next, an intelligent network-connected whole-vehicle MIMO OTA performance test method of the exemplary embodiments of the present invention will be described with reference to fig. 5 and 6.
Based on the same inventive concept, the invention also provides an intelligent network-connected automobile whole-automobile MIMO OTA performance test method, which is executed based on the intelligent network-connected automobile whole-automobile MIMO OTA performance test device as shown in FIG. 5; comprising the following steps:
s501, constructing different wireless channel environments through a plurality of groups of millimeter wave spherical antenna arrays which are horizontally distributed, and measuring the MIMO OTA performance of an equivalent scaling model of a vehicle to be tested in an equivalent millimeter wave test frequency band;
s502, SISO OTA performance measurement is carried out on an equivalent scaling model of a vehicle to be tested in an equivalent millimeter wave test frequency band through a single probe millimeter wave measurement antenna;
and S503, obtaining the MIMO/SISO OTA performance of the whole vehicle to be tested under the real working frequency according to the measurement result.
In another embodiment, referring to fig. 6, the method further comprises:
s601, combining and splicing a plurality of millimeter wave spherical antenna arrays into a plurality of spherical antenna walls in a modularized mode;
s602, performing performance test on the vehicle millimeter wave radar to be tested under the real working frequency through the spherical antenna wall.
It should be noted that although the operations of the method of the present invention are described in a particular order in the above embodiments and the accompanying drawings, this does not require or imply that the operations must be performed in the particular order or that all of the illustrated operations be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
Based on the foregoing inventive concept, as shown in fig. 7, the present invention further provides a computer device 700, including a memory 710, a processor 720, and a computer program 730 stored in the memory 710 and capable of running on the processor 720, where the processor 720 implements the foregoing intelligent network-connected whole vehicle MIMO OTA performance test method when executing the computer program 730.
Based on the foregoing inventive concept, the present invention provides a computer readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the foregoing intelligent network-connected whole vehicle MIMO OTA performance testing method is implemented.
Based on the foregoing inventive concept, the present invention proposes a computer program product comprising a computer program which, when executed by a processor, implements an intelligent network-connected vehicle over-the-air MIMO OTA performance test method.
According to the intelligent network-connected whole-vehicle MIMO OTA performance testing device and method, different wireless channel environments to be tested are constructed through a plurality of groups of millimeter wave spherical antenna arrays distributed horizontally, and MIMO OTA performance measurement is carried out on an equivalent scaling model of a vehicle to be tested under an equivalent millimeter wave testing frequency; and the single probe millimeter wave measuring antenna is utilized to measure SISO OTA performance of the equivalent scaling model of the vehicle to be measured under the equivalent millimeter wave test frequency, the whole MIMO/SISO OTA performance of the vehicle to be measured under the real working frequency is obtained through calculation, the whole scheme can rapidly, efficiently and accurately finish the intelligent network-connected whole MIMO/SISO OTA performance measurement of the vehicle, the darkroom construction and test cost is greatly reduced, and the beneficial hardware support and technical support are provided for the test of the wireless communication performance of the vehicle.
It will be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto 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 flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An intelligent network allies oneself with whole car MIMO OTA capability test device of car, its characterized in that includes: the full-anechoic chamber is provided with a plurality of groups of millimeter wave spherical antenna arrays, antenna sliding rails, single-probe millimeter wave measuring antennas and a testing turntable which are positioned in the full-anechoic chamber;
the full anechoic chamber is used for eliminating the reflection of wireless signals and constructing a free space reflection-free test environment;
the millimeter wave spherical antenna arrays are horizontally distributed; each millimeter wave spherical antenna array comprises a plurality of millimeter wave dual-polarized measuring antennas; the millimeter wave spherical antenna array is used for generating wireless channel environments of different application scenes in a test area, and performing MIMO OTA performance measurement on an equivalent scaling model of a vehicle to be tested in an equivalent millimeter wave test frequency band;
the antenna slide rail is used for bearing the millimeter wave spherical antenna array and adjusting the position of the millimeter wave spherical antenna array according to the requirement of a channel model to be tested during testing;
the single-probe millimeter wave measuring antenna is arranged at the top of the full-wave darkroom, points to the equivalent scaling model of the vehicle to be measured on the test turntable in the normal direction, and performs SISO OTA performance measurement on the equivalent scaling model of the vehicle to be measured in an equivalent millimeter wave test frequency band;
the test turntable is used for bearing and driving the equivalent scaling model of the vehicle to be tested to rotate in the test process, so that the whole vehicle MIMO/SISO OTA performance measurement of the vehicle to be tested under different postures is realized.
2. The device according to claim 1, wherein the sphere center of the millimeter wave spherical antenna array coincides with the origin of the coordinate system of the testing device, the spherical opening angle is 10 °/15 ° of the azimuth plane, and the elevation plane is 60 °;
the origin of the coordinate system of the testing device is the center point of the table top of the testing turntable;
the number of millimeter wave spherical antenna arrays is 8 to 24.
3. The device according to claim 1, wherein the millimeter wave spherical antenna array is composed of a plurality of millimeter wave dual polarization measuring antennas which are distributed uniformly in steps of 5 °;
during testing, 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 coordinate system of the testing device are not lower than 4m.
4. The device of claim 1, wherein the test turret is further configured to carry a millimeter wave radar to be tested on board;
the millimeter wave spherical antenna array can be combined and spliced into a plurality of spherical antenna walls in a modularized mode by a plurality of millimeter wave spherical antenna arrays;
the spherical antenna wall is used for performing performance test on the vehicle millimeter wave radar to be tested under the actual working frequency.
5. The device of claim 1, wherein the antenna rail is a circular orbit laid on the ground, and the center of the circular orbit coincides with the projection of the origin of the coordinate system of the testing device on the ground.
6. The apparatus of claim 1, wherein the vehicle equivalent scaling model is obtained from a scaled down size of the vehicle and the vehicle antenna.
7. The apparatus of claim 1, wherein the equivalent millimeter wave test frequency band corresponds to the size of an equivalent scaling model of the vehicle under test, and is derived using the relationship:
Figure FDA0004090674500000021
wherein f M Is equivalent to a millimeter wave test frequency band; s is S M The dimension of the equivalent scaling model of the vehicle to be measured; f (f) F The working frequency of the vehicle-mounted wireless communication module of the vehicle to be tested is set; s is S F The real size of the vehicle to be tested;
the equivalent millimeter wave test frequency is not lower than 20GHz and not higher than 85GHz.
8. The apparatus of claim 1, wherein the test turret comprises at least a combined axis state, a distributed axis state;
according to the rotation requirements of the equivalent scaling model of the vehicle to be tested in different test scenes, the state of the test turntable is adjusted; when SISO OTA test is carried out, the SISO OTA test is switched to a combined shaft state, and an equivalent scaling model of a vehicle to be tested can be driven to rotate in three dimensions; when the MIMO OTA test is carried out, the system is switched to a distributed axis state, and the equivalent scaling model of the vehicle to be tested can be driven to rotate in two dimensions on the horizontal plane.
9. An intelligent network-connected automobile whole-automobile MIMO OTA performance testing method, which is characterized in that the method is executed based on the intelligent network-connected automobile whole-automobile MIMO OTA performance testing device according to any one of claims 1-8; comprising the following steps:
constructing different wireless channel environments through a plurality of groups of millimeter wave spherical antenna arrays which are horizontally distributed, and measuring the MIMO OTA performance of an equivalent scaling model of the vehicle to be tested in an equivalent millimeter wave test frequency band;
performing SISO OTA performance measurement on an equivalent scaling model of the vehicle to be tested in an equivalent millimeter wave test frequency band through a single probe millimeter wave measurement antenna;
and obtaining the MIMO/SISO OTA performance of the whole vehicle to be tested under the real working frequency according to the measurement result.
10. The method of claim 9, wherein the method further comprises:
combining and splicing a plurality of millimeter wave spherical antenna arrays into a plurality of spherical antenna walls in a modularized mode;
and performing performance test on the vehicle millimeter wave radar to be tested under the real working frequency through the spherical antenna wall.
CN202310150780.7A 2023-02-22 2023-02-22 Intelligent network-connected whole automobile MIMO OTA performance testing device and method Pending CN116318461A (en)

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