CN112865840A

CN112865840A - Method, device and system for testing MIMO wireless terminal

Info

Publication number: CN112865840A
Application number: CN201911183411.8A
Authority: CN
Inventors: 沈鹏辉; 漆一宏; 于伟
Original assignee: GENERAL TEST SYSTEMS Inc
Current assignee: GENERAL TEST SYSTEMS Inc
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-05-28
Anticipated expiration: 2039-11-27
Also published as: CN112865840B

Abstract

The application discloses a method, a device, a system, electronic equipment and a storage medium for testing an MIMO wireless terminal. The method comprises the following steps: acquiring antenna directional diagram information required by testing and a channel model required by testing; determining respective channel correlation matrixes of the antenna directional diagram in a plurality of postures relative to the channel model according to the antenna directional diagram information and the channel model; determining a target test state, and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve; acquiring a target channel correlation matrix corresponding to a target throughput rate test curve; and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix and the target throughput rate test curve of the antenna directional diagram under a plurality of angles relative to the channel model. Therefore, the test time of the MIMO wireless terminal can be greatly shortened, and the technical problem of long test time caused by testing at a plurality of angles is avoided.

Description

Method, device and system for testing MIMO wireless terminal

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, a system, an electronic device, and a computer-readable storage medium for testing a MIMO wireless terminal.

Background

The purpose of an Over The Air (OTA) test of a Multiple-Input Multiple-Output (MIMO) antenna is to ensure that the test result in a laboratory can truly reflect the wireless performance of a wireless terminal in various complex actual use environments and user use states.

In the related art, both the multi-probe method and the radiation two-step method need to test the performance curve of the channel model relative to each angle of the tested piece. Taking a two-dimensional multi-probe test as an example, as shown in fig. 1, in one measurement, the channel model is not changed, and the measured object needs to rotate inside a dark room to obtain the performance of each angle, and then the final result is obtained in an averaging manner. As shown in fig. 1, when the surrounding environment is fixed, the throughput performance of the dut changes when the dut rotates in any direction, so in order to evaluate the overall performance of the dut, the standard specifies that the throughput of the dut needs to be tested at each attitude (change in azimuth and pitch with respect to the channel model) of the dut. According to the 3GPP (3rd Generation Partnership Project) and CTIA (national association of wireless communication and internet), the throughput rate test in two-dimensional space requires a resolution of at least 30 degrees of sampling angle, so that for MIMO test in two-dimensional space, at least 12 curves (corresponding to 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 °, 330 ° in one phi section, respectively) need to be tested; for MIMO testing in three dimensions, at least 72 curves are required (theta axis for 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, phi axis for 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 °, 330 °, 12 × 6 ═ 72 in total). According to CTIA and 3GPP regulation setting, testing a curve takes 6-10 minutes, so for a two-dimensional channel model, the MIMO test takes 72-120 minutes, and for a three-dimensional MIMO test takes 432-720 minutes.

However, for MIMO wireless terminal manufacturers, the number of wireless terminals is extremely large, and if one wireless terminal needs to face such a long test time, product inspection cannot be realized; the research and development period of the MIMO wireless terminal is relatively compact, for example, a mobile phone has short research and development time, and the performance can be rapidly tested; a wireless terminal is essentially unable to support hundreds of minutes of testing on a base power level. In sum, too long test time is intolerable for MIMO devices.

Disclosure of Invention

The present application aims to solve at least one of the technical problems in the related art to some extent.

To this end, a first objective of the present application is to provide a method for testing a MIMO wireless terminal. The method can greatly shorten the test time of the MIMO wireless terminal, avoid the technical problem of long test time caused by testing at a plurality of angles, and realize the purpose of rapid test.

A second objective of the present application is to provide an OTA testing method for a MIMO wireless terminal.

A third objective of the present application is to provide a testing apparatus for a MIMO wireless terminal.

A fourth objective of the present application is to provide an OTA testing apparatus for a MIMO wireless terminal.

A fifth object of the present application is to provide a test system for a MIMO wireless terminal.

A sixth object of the present application is to provide an electronic apparatus.

A seventh object of the present application is to propose a computer-readable storage medium.

In order to achieve the above object, an embodiment of a first aspect of the present application provides a method for testing a MIMO wireless terminal, including the following steps: acquiring antenna directional diagram information required by testing and a channel model required by testing; determining respective channel correlation matrices of the antenna directional diagram at a plurality of angles relative to the channel model according to the antenna directional diagram information and the channel model; determining a target test state, and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve; acquiring a target channel correlation matrix corresponding to the target throughput rate test curve; and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram under a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve.

According to the method for testing the MIMO wireless terminal, antenna directional diagram information required by testing and a channel model required to be tested can be obtained, then according to the antenna directional diagram information and the channel model, respective channel correlation matrixes of an antenna directional diagram relative to the channel model under multiple angles are determined, then a target testing state is determined, the MIMO wireless terminal under the target testing state is tested, and a corresponding target throughput rate testing curve is obtained; and acquiring a target channel correlation matrix corresponding to the target throughput rate test curve, and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram at a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve. Therefore, only one throughput rate test curve of the MIMO wireless terminal under a certain posture needs to be tested, the throughput rate curve of any other angle can be calculated according to the throughput rate test curve and the channel correlation matrix of any other angle, the overall performance of the MIMO wireless terminal can be obtained, the test time of the MIMO wireless terminal can be greatly shortened, the technical problem that the test time is long due to the fact that a plurality of angles are tested is avoided, and the purpose of rapid test is achieved.

In order to achieve the above object, a second embodiment of the present application provides an OTA testing method for a MIMO wireless terminal, including: acquiring antenna directional pattern information of the MIMO wireless terminal and a channel model required by testing; determining respective channel correlation matrixes of the MIMO wireless terminal under a plurality of postures relative to the channel model according to the antenna directional diagram information and the channel model; selecting a gesture to be tested from the gestures, and performing OTA (over the air) test on the MIMO wireless terminal in the gesture to be tested to obtain a corresponding target throughput rate test curve; acquiring a target channel correlation matrix corresponding to the target throughput rate test curve; and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix and the target throughput rate test curve of the MIMO wireless terminal in a plurality of postures relative to the channel model.

According to the OTA test method of the MIMO wireless terminal, the antenna directional diagram information and the channel model of the MIMO wireless terminal are used for calculating the respective channel correlation matrix of the MIMO wireless terminal in a plurality of postures relative to the channel model, then one posture to be tested is selected from the plurality of postures, the MIMO wireless terminal in the posture to be tested is subjected to OTA test to obtain a target throughput rate test curve, then the throughput rate curves of the MIMO wireless terminal in other postures relative to the channel model are calculated based on the target throughput rate test curve, and then the overall performance value of the MIMO wireless terminal can be obtained according to the throughput rate curves in other postures and the target throughput rate test curve. Therefore, in the whole process, only one gesture to be tested needs to be selected to carry out OTA test on the MIMO wireless terminal, so that the test time is greatly saved, and the aim of OTA quick test of the MIMO wireless terminal is fulfilled.

In order to achieve the above object, a third aspect of the present application provides a testing apparatus for a MIMO wireless terminal, including: the acquisition module is used for acquiring antenna directional pattern information required by the test and a channel model required by the test; a channel correlation matrix determining module, configured to determine, according to the antenna pattern information and the channel model, respective channel correlation matrices of the antenna pattern at multiple angles with respect to the channel model; the test module is used for determining a target test state and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve; a target channel correlation matrix obtaining module, configured to obtain a target channel correlation matrix corresponding to the target throughput rate test curve; and the overall performance acquisition module is used for acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram under a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve.

According to the testing device of the MIMO wireless terminal, antenna directional diagram information and a channel model required by testing can be obtained, then according to the antenna directional diagram information and the channel model, respective channel correlation matrixes of an antenna directional diagram relative to the channel model under multiple angles are determined, then a target testing state is determined, the MIMO wireless terminal under the target testing state is tested, and a corresponding target throughput rate testing curve is obtained; and acquiring a target channel correlation matrix corresponding to the target throughput rate test curve, and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram at a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve. Therefore, only one throughput rate test curve of the MIMO wireless terminal under a certain attitude (namely one angle of the steering wheel relative to the channel model) needs to be tested, and then the throughput rate curve of any other angle can be calculated according to the throughput rate test curve and the channel correlation matrix of any other angle, so that the overall performance of the MIMO wireless terminal can be obtained, the test time of the MIMO wireless terminal can be greatly shortened, the technical problem that the test time is long due to the fact that a plurality of angles are tested is avoided, and the purpose of rapid test is achieved.

In order to achieve the above object, a fourth aspect of the present application provides an OTA testing apparatus for a MIMO wireless terminal, including: the first acquisition module is used for acquiring antenna directional pattern information of the MIMO wireless terminal and a channel model required by testing; a determining module, configured to determine, according to the antenna pattern information and the channel model, respective channel correlation matrices of the MIMO wireless terminal in a plurality of postures with respect to the channel model; the test module is used for selecting a gesture to be tested from the gestures and carrying out OTA test on the MIMO wireless terminal in the gesture to be tested to obtain a corresponding target throughput rate test curve; the second obtaining module is used for obtaining a target channel correlation matrix corresponding to the target throughput rate test curve; a third obtaining module, configured to obtain an overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix, and the target throughput test curve of the MIMO wireless terminal in multiple postures with respect to the channel model.

According to the OTA testing device of the MIMO wireless terminal, the MIMO wireless terminal is respectively calculated in a plurality of postures relative to the channel model through the antenna directional diagram information and the channel model of the MIMO wireless terminal, then one posture to be tested is selected from the plurality of postures, the MIMO wireless terminal in the posture to be tested is subjected to OTA testing to obtain a target throughput rate testing curve, then each throughput rate curve of the MIMO wireless terminal in other postures relative to the channel model is calculated based on the target throughput rate testing curve, and then the overall performance value of the MIMO wireless terminal can be obtained according to the throughput rate curves in other postures and the target throughput rate testing curve. Therefore, in the whole process, only one gesture to be tested needs to be selected to carry out OTA test on the MIMO wireless terminal, so that the test time is greatly saved, and the aim of OTA quick test of the MIMO wireless terminal is fulfilled.

In order to achieve the above object, an embodiment of a fifth aspect of the present application provides a test system for a MIMO wireless terminal, including: a darkroom in which the MIMO wireless terminal and at least one antenna are placed; the base station simulator is used for simulating the function of a base station and generating an original signal; the channel simulator is used for generating a corresponding channel environment according to a channel model to be tested; a testing device, the testing device being a testing device of the MIMO wireless terminal according to the third aspect of the present application; wherein the base station simulator, the channel simulator and the testing device are arranged outside the darkroom.

To achieve the above object, a sixth aspect of the present application provides an electronic device, including: the testing method comprises the following steps of storing a test result of the MIMO wireless terminal, and storing the test result in a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein when the processor executes the computer program, the testing method of the MIMO wireless terminal is realized.

To achieve the above object, a seventh embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for testing the MIMO wireless terminal according to the first embodiment of the present application.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which,

fig. 1 is a schematic structural diagram of a tested piece in a multipath environment according to the prior art.

Fig. 2 is a schematic diagram of a multi-probe system according to the prior art.

FIG. 3 is a schematic diagram of a two-step irradiation process according to the prior art.

Fig. 4 is a flow chart of a method of testing a MIMO wireless terminal according to one embodiment of the present application.

Fig. 5 is a schematic structural diagram of a MIMO wireless terminal according to an embodiment of the present application communicating in standard communication.

Fig. 6 is a schematic structural diagram of a relationship between downlink power and throughput according to an embodiment of the present application.

Fig. 7 is a flowchart of a method for testing a MIMO wireless terminal according to a specific embodiment of the present application.

FIG. 8 is a schematic diagram of the structure of different test curves according to one embodiment of the present application.

Fig. 9 is a schematic diagram of a signal transmission and reception scheme according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of a test apparatus of a MIMO wireless terminal according to an embodiment of the present application.

Fig. 11 is a flow chart of a method for OTA testing of a MIMO wireless terminal according to one embodiment of the present application.

Fig. 12 is a schematic structural diagram of an OTA testing apparatus of a MIMO wireless terminal according to an embodiment of the present application.

Fig. 13 is a block diagram of an OTA test system for a MIMO wireless terminal according to one embodiment of the present application.

FIG. 14 is a schematic structural diagram of an electronic device according to one embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

Firstly, it should be noted that the purpose of the OTA technology OTA test of the MIMO wireless terminal is to ensure that the test result in the laboratory can truly reflect the wireless performance of the wireless terminal in various complex actual use environments and user use states.

In order to guarantee the performance of the MIMO wireless terminal device, and to guarantee the electromagnetic compatibility and the electromagnetic safety of communication, the MIMO wireless terminal device needs to be subjected to OTA testing before release. The MIMO communication technology can realize the simultaneous transmission of multiple code streams by means of a multi-antenna system, thereby greatly increasing the communication rate. In this transmission mode, the propagation environment has a great influence on the transmission rate. In order to embody the real user experience of the wireless terminal of the MIMO terminal, the MIMO test needs to consider a channel model used by the wireless terminal, wherein, as shown in fig. 1, the channel model is a mathematical transformation of the classical usage environment of the MIMO wireless terminal, and includes factors such as signal reflection, diffraction, doppler, and the like.

Currently, the major MIMO wireless terminal testing methods provided by 3GPP (3rd Generation Partnership Project) are multi-probe Method (MPAC) and radiation two-step method (RTS). For example, as shown in fig. 2, in the multi-probe method, a plurality of antennas are built inside a darkroom and wound around an MIMO wireless terminal, and then radio frequency signals are played for all the antennas through a channel simulator, so that the radio frequency signals reaching the position of a measured piece in the center of the darkroom conform to the description of a channel model. For another example, as shown in fig. 3, the radial two-step method employs a mathematical approach to achieve simulation of the channel model. The radiation two-step process is based on the following principle: firstly, obtaining antenna directional pattern information of a tested piece, then calculating a throughput rate test signal, and finally feeding the throughput rate test signal into a receiver port in a radiation mode.

In the related art, both the multi-probe method and the radiation two-step method need to test the performance curve of the channel model relative to each angle of the tested piece. Taking a two-dimensional multi-probe test as an example, as shown in fig. 1, in one measurement, the channel model is not changed, and the measured object needs to rotate inside a dark room to obtain the performance of each angle, and then the final result is obtained in an averaging manner. As shown in fig. 1, when the surrounding environment is fixed, the throughput performance of the dut changes when the dut rotates in any direction, so in order to evaluate the overall performance of the dut, the standard specifies that the throughput of the dut needs to be tested at each attitude (change in azimuth and pitch with respect to the channel model) of the dut. According to the regulations of 3GPP and CTIA, the throughput rate test of a two-dimensional space requires the resolution of at least 30 degrees of sampling angle, so that for the MIMO test of the two-dimensional space, at least 12 curves (respectively corresponding to 0 degree, 30 degree, 60 degree, 90 degree, 120 degree, 150 degree, 180 degree, 210 degree, 240 degree, 270 degree, 300 degree and 330 degree on a phi section) need to be tested; for MIMO testing in three dimensions, at least 72 curves are required (theta axis for 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, phi axis for 0 °, 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 °, 330 °, 12 × 6 ═ 72 in total). According to CTIA and 3GPP regulation setting, testing a curve takes 6-10 minutes, so for a two-dimensional channel model, the MIMO test takes 72-120 minutes, and for a three-dimensional MIMO test takes 432-720 minutes.

To this end, the present application proposes a method, an apparatus, a system, an electronic device and a computer readable storage medium for testing a MIMO wireless terminal, and in particular, the method, the apparatus, the system, the electronic device and the computer readable storage medium for testing a MIMO wireless terminal according to an embodiment of the present application are described below with reference to the accompanying drawings.

Fig. 4 is a flow chart of a method of testing a MIMO wireless terminal according to one embodiment of the present application. It should be noted that the testing method of the MIMO wireless terminal according to the embodiment of the present application can be applied to a testing apparatus of the MIMO wireless terminal according to the embodiment of the present application, and the apparatus can be configured on an electronic device. In the embodiments of the present application, the electronic device may be a PC or a mobile terminal (e.g., a mobile phone, a tablet computer, a PAD, a personal digital assistant, and other hardware devices with various operating systems).

It should be further noted that the test method for the MIMO wireless terminal according to the embodiment of the present application may be applied to an OTA test scenario of the MIMO wireless terminal, and may also be applied to a conducted test scenario of the MIMO wireless terminal.

As shown in fig. 4, the OTA testing method of the MIMO wireless terminal may include:

and S410, acquiring antenna pattern information required by the test and a channel model required by the test.

In the embodiment of the present application, the antenna pattern information includes gain information of each antenna of the MIMO wireless terminal in each direction, and related information such as phase offset information of the same signal received in each direction of any two antennas.

For example, the antenna pattern information required for the test and the channel model required for the test may be stored in the storage module in advance, so that when the MIMO wireless terminal is tested, the antenna pattern information required for the test and the channel model required for the test may be obtained from the storage module. It should be noted that, in the embodiment of the present application, the antenna pattern information required for the test may be antenna pattern information of the MIMO wireless terminal, or may also be a simulated antenna pattern, or an antenna pattern obtained through actual measurement, which is not limited in this application.

In an embodiment of the present application, the antenna pattern information required for the test may be a simulation result obtained in simulation software.

And S420, determining respective channel correlation matrixes of the antenna pattern under a plurality of angles relative to the channel model according to the antenna pattern information and the channel model.

It can be understood that, since the MIMO wireless terminal rotates (or has different pointing angles) with respect to the channel model in different postures, it is necessary to count the channel correlation matrices under all conditions to be tested (angles of the directional pattern with respect to the channel) so as to determine a state to be tested for testing, and then calculate all throughput curves.

Firstly, it should be noted that both the radiation two-step method and the multi-probe method implement the signal propagation formula of the wireless antenna inside the darkroom. The signal propagation of the wireless antenna can be as shown in fig. 5, wherein the signal is received by the wireless system through spatial fading from the base station, and therefore, the factors affecting the throughput rate can be classified into three categories: channel model, antenna performance, and receiver performance. The antenna performance and the channel model together determine an electric field reaching an antenna feed point, and the antenna performance comprises all information about electromagnetic wave spatial distribution, such as correlation among antennas, antenna gain, channel fading, channel correlation and the like; receiver performance includes the sensitivity of the receiver itself and the degradation of sensitivity due to interference.

For example, for the MIMO system of SxU, the signal propagation equation can be expressed as follows:

y(t)＝H(t)*x(t)+n(t) (1)

where y (t) is the received signal, x (t) is the signal from the base station, h (t) is the channel correlation matrix, n (t) is the presence of interference noise at reception, and t is time.

The (u, s) element of H (t) is recorded as h_u，s(t), which represents the propagation equation for the signal from the s-th transmitter to the u-th receiver, experiences path fading, phase offset, doppler, etc.

Wherein N is the number of all the sub-paths.

Wherein the content of the first and second substances,

is the complex gain of the u-th terminal antenna in the v-polarization,

is the complex gain of the u-th terminal antenna in the h-polarization,

is the complex gain of the s-th base station antenna in the v polarization,

is the complex gain of the s-th base station antenna in the h-polarization,

is the complex gain matrix of the nth sub-path of the channel, phi_n，AoDAnd phi_n，AoAIs the departure angle and arrival angle of the nth minor diameter, psi_nAre representative of phase and doppler factors.

In this step, respective channel correlation matrices of the antenna pattern at a plurality of angles with respect to the channel model can be calculated by the signal propagation formula (1) according to the antenna pattern information and the channel model.

And S430, determining a target test state, and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve.

In an embodiment of the present application, a target test state may be determined according to a preset target antenna directional diagram and an angle of the target antenna directional diagram with respect to a channel model, and then, an attitude of the MIMO wireless terminal located in a darkroom may be adjusted to make the attitude of the MIMO wireless terminal in the target test state, at this time, the MIMO wireless terminal in the target test state may be tested, so as to obtain a corresponding target throughput rate test curve. The throughput test curve may be understood to be a corresponding relationship for representing the throughput and the downlink power, for example, as shown in fig. 6, the throughput test curve is a schematic diagram of the throughput and the downlink power.

S440, obtaining a channel correlation matrix corresponding to the target throughput rate test curve.

As an example, when the target test state is determined according to a preset target antenna pattern and an angle thereof relative to the channel model, obtaining a channel correlation matrix corresponding to the target throughput test curve includes: according to the preset target antenna directional diagram and the channel model, the channel correlation matrix of the target antenna directional diagram at the angle relative to the channel model can be determined by utilizing the formulas (1), (2) and (3), and the channel correlation matrix is the channel correlation matrix corresponding to the target throughput rate test curve.

S450, obtaining the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram under a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve.

Optionally, after obtaining the corresponding target throughput rate test curve, the throughput rate curves of the MIMO wireless terminal at multiple angles relative to the antenna directional diagram may be obtained according to the respective channel correlation matrices of the antenna directional diagram at multiple angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve, and then the overall performance value of the MIMO wireless terminal may be obtained according to the target throughput rate test curve and the throughput rate curves at multiple angles.

That is, according to the standard communication setting, the relationship between the throughput and the downlink power is obtained by testing in a target test state, here, only one throughput test curve is needed to be tested, for the throughput and the downlink power curve at any other angle, the throughput curve at any other angle is calculated by calculating the channel correlation matrix according to the obtained channel correlation matrix and the tested throughput test curve, and then the overall performance value of the MIMO wireless terminal is calculated according to the throughput curves at all angles. The specific implementation process can be referred to the description of the subsequent embodiments.

According to the method for testing the MIMO wireless terminal, antenna directional diagram information required by testing and a channel model required by testing can be obtained, then according to the antenna directional diagram information and the channel model, respective channel correlation matrixes of an antenna directional diagram relative to the channel model under multiple angles are determined, then a target testing state is determined, the MIMO wireless terminal under the target testing state is tested, and a corresponding target throughput rate testing curve is obtained; and acquiring a target channel correlation matrix corresponding to the target throughput rate test curve, and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram at a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve. Therefore, only one throughput rate test curve of the MIMO wireless terminal under a certain attitude (namely one angle of the steering wheel relative to the channel model) needs to be tested, and then the throughput rate curve of any other angle can be calculated according to the throughput rate test curve and the channel correlation matrix of any other angle, so that the overall performance of the MIMO wireless terminal can be obtained, the test time of the MIMO wireless terminal can be greatly shortened, the technical problem that the test time is long due to the fact that a plurality of angles are tested is avoided, and the purpose of rapid test is achieved.

Fig. 7 is a flowchart of a method for testing a MIMO wireless terminal according to a specific embodiment of the present application. As shown in fig. 7, the method for testing a MIMO wireless terminal may include:

and S710, acquiring antenna pattern information required by the test and a channel model required by the test.

S720, according to the antenna directional diagram information and the channel model, determining respective channel correlation matrixes of the antenna directional diagram relative to the channel model under a plurality of angles.

And S730, determining a target test state, and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve.

And S740, obtaining a target channel correlation matrix corresponding to the target throughput rate test curve.

It should be noted that, in the embodiment of the present application, the implementation manners of the steps S710 to S740 may refer to the description of the implementation manners of the steps S410 to S440, and are not described herein again.

And S750, calculating radio frequency parameter values corresponding to the plurality of channel correlation matrixes respectively according to the respective channel correlation matrixes of the antenna directional diagram relative to the channel model under a plurality of angles.

As an example, according to respective channel correlation matrices of the antenna pattern at a plurality of angles with respect to the channel model, the radio frequency parameter value corresponding to each of the plurality of channel correlation matrices may be calculated by a preset formula. In this example, the preset formula can be expressed as follows:

the psi represents a radio frequency parameter value corresponding to the channel correlation matrix under the current attitude; cond () represents the matrix condition number;K₂and K₃Are respectively constant, and K₂＝0.25,K₃＝0.5；

Wherein U is 1,2, …, U; s₁＝1,2,…,S；s₂＝1,2,…,S；s₁<s₂

Where ρ is^txIs defined as all

Wherein, S is 1, 2. u. of₁＝1,2,...,U；u₂＝1,2,...,U；u₁<u₂

The product is then multiplied by the power of T, T is

The number of (2); rho^rxIs defined as all

The product of the values is then raised to the power of R, R being

The number of (2); e represents a mathematical expectation; h is^*(t) denotes the conjugate of h (t); delta N_uRepresenting the noise in dBm of the u-th receiver in the wireless terminal; h is_u,s(t) represents the transmission of a signal from the s-th transmitter to said u-th receiverA broadcast formula, which is also an element of the ith row and the s column in the channel correlation matrix H (t); s represents the total number of transmitters; u represents the total number of receivers. It should be noted that, through a lot of experiments, the inventor finds that the channel correlation matrix h (t) has an influence relationship on the throughput rate, and proposes the following throughput rate calculation formula for the influence relationship of the channel correlation matrix h (t) on the throughput rate:

TP_m＝R_m*K(P_d+ψ+Q) (5)

wherein Tp_mIs the throughput rate; r_mThe maximum throughput rate value (unit is Mbps) that a wireless terminal can support under a fixed standard, for example, for LTE FDD 2 × 2MIMO with 10M bandwidth specified by 3GPP, the maximum throughput rate is 35.424Mbps, which is set according to 3GPP TR 37.977; k () is an operator function; p_dIs the downlink power (in dBm); psi is a radio frequency parameter value, which can be calculated by using the channel correlation matrix H (t) according to the preset formula and expressed in dB; q is a constant for a fixed system.

Therefore, by using the influence relationship between the channel correlation matrix h (t) and the throughput, the radio frequency performance related parameters corresponding to the channel correlation matrices are calculated according to the respective channel correlation matrices at a plurality of angles and by using the preset formula, so that the throughput curve of the MIMO wireless terminal at each angle is calculated by using the throughput calculation formula according to the radio frequency performance related parameters corresponding to the channel correlation matrices.

And S760, calculating the radio frequency parameter value corresponding to the target channel correlation matrix according to the target channel correlation matrix corresponding to the target throughput rate test curve.

And S770, calculating throughput rate curves of the MIMO wireless terminal relative to the antenna directional pattern under a plurality of angles relative to the channel model according to the radio frequency parameter values corresponding to the plurality of channel correlation matrixes, the radio frequency parameter value corresponding to the target channel correlation matrix and the target throughput rate test curve.

As an example, the offset between the radio frequency parameter value corresponding to each of the plurality of channel correlation matrices and the radio frequency parameter value corresponding to the target channel correlation matrix may be calculated, and then, the throughput curves of the MIMO wireless terminal at a plurality of angles with respect to the antenna pattern with respect to the channel model may be calculated according to the offset between the radio frequency parameter value corresponding to each of the plurality of channel correlation matrices and the radio frequency parameter value corresponding to the target channel correlation matrix and the target throughput test curve.

It should be noted that, by performing a large number of test experiments, the inventors have calculated that the throughput curves of the MIMO wireless terminal at different angles are the same in shape but different in position according to the throughput calculation formula (5), for example, as shown in fig. 8, the throughput curves at different angles are shifted in position.

Therefore, by using the characteristic, only the throughput rate curve at one angle needs to be tested, after one throughput rate test is performed to obtain one throughput rate test curve, for the throughput rate and downlink power curve at any other angle, the corresponding radio frequency parameter values at other angles are calculated by calculating the channel correlation matrixes corresponding to the channel correlation matrixes at other angles and according to the corresponding channel correlation matrixes at other angles, the offset between the corresponding radio frequency parameter values at other angles and the radio frequency parameter values corresponding to the target throughput rate test curve is calculated, and the target throughput rate test curve is translated based on the offset, so that the throughput rate curves at other angles can be obtained.

And S780, acquiring the overall performance value of the MIMO wireless terminal according to the target throughput test curve and the throughput curves at a plurality of angles.

Optionally, after obtaining respective throughput test curves corresponding to a plurality of angles, the overall performance value of the MIMO wireless terminal may be obtained by averaging according to all the throughput curves.

For the convenience of those skilled in the art to understand the present application more easily, the following calculation principle is described by taking the downlink throughput performance of a 2x2MIMO system as an example:

for a 2-path transmitting two-path receiving MIMO system, the relationship between the transmitted and received signals can be expressed as:

wherein, the schematic diagram of the signal transmitting and receiving schematic diagram can be as shown in fig. 9.

As can be seen from equation (6) and the schematic diagrams of the signal transmission and reception diagrams, for a MIMO receiver, the signal it faces is

The receiver is receiving

Then, by aligning the matrix

Perform inversion (such as zero-forcing demodulation) and then restore

Theoretically, h (t) can be obtained, as shown in equations (1), (2) and (3), then a rapid test algorithm for throughput rate can be obtained by calculating the influence of h (t) on the throughput rate of the receiver under different conditions.

Through a large number of experiments, the inventor finds that H (t) has a corresponding influence relation with the throughput rate, and proposes a calculation formula of the throughput rate as follows:

Tp_m＝R_m*K(P_d+ψ+Q) (7)，

wherein R is_mIs the maximum throughput rate (Mbps) that can be supported by the wireless terminal under a fixed standard, such as the 10M bandwidth LTE FDD 2x2MIM 0 specified by 3GPP, the theoretical maximum throughput rate is 35.424Mbps, P_dIs the downlink power (unit is dBm), psi is the radio frequency parameter value corresponding to the channel correlation matrix under the current attitude, can be calculated by H (t) combined by an antenna directional diagram and a channel model, and is expressed in a dB form, and Q is a constant for a fixed system.

Where for U-2 and S-2, the specific derivation procedure ψ may be as follows:

the expression for final Ψ is:

then, according to the calculation formula (7) of the throughput, the inventors found that the throughput curves of the MIMO wireless terminal are the same in shape and shifted in position under different postures. Therefore, in the embodiment of the present application, by using the above characteristics, in the process of testing the MIMO wireless terminal, the wireless terminal is in the target test state, then throughput measurement is performed on the MIMO wireless terminal in the target test state for one time, so that a target throughput test curve can be obtained, then the difference between the radio frequency parameter values corresponding to other angles and the radio frequency parameter values corresponding to the target test state is calculated, the difference can be used as an offset, then the target throughput test curve is translated according to each offset, so that throughput curves at other angles can be obtained, and finally, the overall performance value of the MIMO wireless terminal is calculated through all the throughput curves. Therefore, the MIMO performance (no matter 2D or 3D) of the whole wireless terminal can be completely obtained only by knowing an antenna directional diagram, a channel model and a throughput rate test curve, and the test time is greatly shortened. In fact, the method can achieve that only one curve needs to be tested to obtain the values of all curves, and thus, for 3D MIMO OTA testing, the method can be 72 times faster than the conventional method. The testing time is greatly shortened. And the method can be used on a multi-probe system and a radiation two-step method system.

Corresponding to the testing methods of the MIMO wireless terminal provided in the foregoing several embodiments, an embodiment of the present application further provides a testing apparatus of the MIMO wireless terminal, and since the testing apparatus of the MIMO wireless terminal provided in the embodiment of the present application corresponds to the testing methods of the MIMO wireless terminal provided in the foregoing several embodiments, the implementation of the testing method of the MIMO wireless terminal is also applicable to the testing apparatus of the MIMO wireless terminal provided in the embodiment, and is not described in detail in the embodiment. Fig. 10 is a schematic structural diagram of a test apparatus of a MIMO wireless terminal according to an embodiment of the present application.

As shown in fig. 10, the MIMO wireless terminal testing apparatus 1000 includes: an acquisition module 1010, a channel correlation matrix determination module 1020, a test module 1030, a target channel correlation matrix acquisition module 1040, and an overall performance acquisition module 1050.

Wherein:

the obtaining module 1010 is configured to obtain antenna pattern information required for a test and a channel model required for the test;

the channel correlation matrix determining module 1020 is configured to determine, according to the antenna pattern information and the channel model, respective channel correlation matrices of the antenna pattern at a plurality of angles with respect to the channel model;

the test module 1030 is configured to determine a target test state, and test the MIMO wireless terminal in the target test state to obtain a corresponding target throughput test curve; as an example, the testing module 1030 is specifically configured to: and determining a target test state according to a preset target antenna directional diagram and the angle of the target antenna directional diagram relative to the channel model.

The target channel correlation matrix obtaining module 1040 is configured to obtain a target channel correlation matrix corresponding to the target throughput rate test curve;

the overall performance obtaining module 1050 is configured to obtain an overall performance value of the MIMO wireless terminal according to the respective channel correlation matrices of the antenna pattern at multiple angles with respect to the channel model, the target channel correlation matrix corresponding to the target throughput test curve, and the target throughput test curve.

In one embodiment of the present application, the overall performance obtaining module 1050 includes: a first acquisition unit and a second acquisition unit. A first obtaining unit, configured to obtain throughput curves of the MIMO wireless terminal at multiple angles relative to the antenna directional diagram relative to the channel model according to respective channel correlation matrices of the antenna directional diagram at multiple angles relative to the channel model, a target channel correlation matrix corresponding to the target throughput test curve, and the target throughput test curve; and a second obtaining unit, configured to obtain an overall performance value of the MIMO wireless terminal according to the target throughput test curve and throughput curves of the MIMO wireless terminal at multiple angles with respect to the antenna pattern with respect to the channel model.

In one embodiment of the present application, the first obtaining unit includes: the system comprises a first calculation subunit, a second calculation subunit and a third calculation subunit. The first calculating subunit is configured to calculate, according to respective channel correlation matrices of the MIMO wireless terminal at a plurality of angles with respect to the antenna pattern with respect to the channel model, radio frequency parameter values corresponding to the plurality of channel correlation matrices; the second calculating subunit is configured to calculate, according to a target channel correlation matrix corresponding to the target throughput rate test curve, a radio frequency parameter value corresponding to the target channel correlation matrix; and the third calculating subunit is configured to calculate throughput rate test curves of the antenna directional diagram at multiple angles relative to the channel model according to the radio frequency parameter values corresponding to the multiple channel correlation matrices, the radio frequency parameter value corresponding to the target channel correlation matrix, and the target throughput rate test curve.

In an embodiment of the application, the first calculating subunit is specifically configured to: according to respective channel correlation matrixes of the MIMO wireless terminal under a plurality of angles relative to the antenna directional diagram and the channel model, calculating radio frequency parameter values corresponding to the plurality of channel correlation matrixes through a preset formula; wherein the preset formula is expressed as follows:

the psi represents a radio frequency parameter value corresponding to the channel correlation matrix under the current attitude; cond () represents the matrix condition number; k₂And K₃Are respectively constant, and K₂＝0.25,K₃＝0.5；

Wherein U is 1,2, …, U; s₁＝1,2,…,S；s₂＝1,2,…,S；s₁<s₂

Where ρ is^txIs defined as all

Wherein, S is 1, 2. u. of₁＝1,2,...,U；u₂＝1,2,...,U；u₁<u₂

The product is then multiplied by the power of T, T is

The number of (2); rho^rxIs defined as all

The product of the values is then raised to the power of R, R being

The number of (2); e represents a mathematical expectation; h is^*(t) denotes the conjugate of h (t); delta N_uRepresenting the noise in dBm of the u-th receiver in the wireless terminal; h is_u,s(t) represents a propagation equation for the signal from the s-th transmitter to the u-th receiver; s represents the total number of transmitters; u represents the total number of receivers.

In an embodiment of the application, the third computing subunit is specifically configured to: calculating the offset between the radio frequency parameter value corresponding to each of the plurality of channel correlation matrixes and the radio frequency parameter value corresponding to the target channel correlation matrix; and calculating throughput rate curves of the MIMO wireless terminal relative to the antenna directional diagram under a plurality of angles relative to the channel model according to the offset between the radio frequency parameter values corresponding to the plurality of channel correlation matrixes and the radio frequency parameter values corresponding to the target channel correlation matrix and the target throughput rate test curve.

Fig. 11 is a flow chart of a method for OTA testing of a MIMO wireless terminal according to one embodiment of the present application. As shown in fig. 11, the OTA testing method of the MIMO wireless terminal may include:

s1101, obtaining antenna directional diagram information of the MIMO wireless terminal and a channel model required by testing.

S1102, determining respective channel correlation matrixes of the MIMO wireless terminal in a plurality of postures relative to the channel model according to the antenna directional diagram information and the channel model.

In this step, the respective channel correlation matrices of the MIMO wireless terminal in a plurality of orientations with respect to the channel model can be calculated from the antenna pattern information and the channel model by the above signal propagation equations (1), (2) and (3).

S1103, selecting one gesture to be tested from the plurality of gestures, and performing OTA test on the MIMO wireless terminal in the gesture to be tested to obtain a corresponding target throughput rate test curve.

And S1104, acquiring a target channel correlation matrix corresponding to the target throughput rate test curve.

Optionally, according to the to-be-tested attitude corresponding to the target throughput rate test curve, a target channel correlation matrix corresponding to the target throughput rate test curve is determined from respective channel correlation matrices in multiple attitudes.

S1105, obtaining the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix and the target throughput rate test curve of the MIMO wireless terminal in a plurality of postures relative to the channel model.

Optionally, calculating radio frequency parameter values corresponding to the plurality of channel correlation matrices according to respective channel correlation matrices of the MIMO wireless terminal in a plurality of postures with respect to the channel model; then, determining a radio frequency parameter value corresponding to a target throughput rate test curve from radio frequency parameter values corresponding to the multiple channel correlation matrixes respectively based on the to-be-tested attitude; and finally, calculating the integral performance value of the MIMO wireless terminal by using the throughput rate curves in all the postures.

Fig. 12 is a schematic structural diagram of an OTA testing apparatus of a MIMO wireless terminal according to an embodiment of the present application. As shown in fig. 12, the OTA testing apparatus 1200 of the MIMO wireless terminal may include: a first obtaining module 1201, a determining module 1202, a testing module 1203, a second obtaining module 1204, and a third obtaining module 1205.

Specifically, the first obtaining module 1201 is configured to obtain antenna pattern information of the MIMO wireless terminal and a channel model required for testing.

The determining module 1202 is configured to determine respective channel correlation matrices of the MIMO wireless terminal in a plurality of orientations with respect to the channel model based on the antenna pattern information and the channel model.

The testing module 1203 is configured to select one gesture to be tested from the multiple gestures, and perform OTA testing on the MIMO wireless terminal in the gesture to be tested to obtain a corresponding target throughput testing curve.

The second obtaining module 1204 is configured to obtain a target channel correlation matrix corresponding to the target throughput rate test curve.

The third obtaining module 1205 is configured to obtain an overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix, and the target throughput rate test curve of the MIMO wireless terminal in multiple postures with respect to the channel model.

In order to implement the above embodiments, the present application further provides a test system for a MIMO wireless terminal. Fig. 13 is a schematic structural diagram of a test system of a MIMO wireless terminal according to an embodiment of the present application. As shown in fig. 13, the test system of the MIMO wireless terminal may include: a darkroom 1310, a base station simulator 1320, a channel simulator 1330, and a testing apparatus 1340.

Specifically, the MIMO wireless terminal and at least one antenna are placed in a darkroom 1310; the base station simulator 1320 is configured to simulate a function of a base station and generate an original signal; the channel simulator 1330 is configured to generate a corresponding channel environment according to a channel model to be tested; the testing device 1340 is a testing device of the MIMO wireless terminal according to any of the embodiments described above; wherein the base station simulator, the channel simulator and the testing device are arranged outside the darkroom.

In order to implement the above embodiments, the present application further provides an electronic device.

FIG. 14 is a schematic structural diagram of an electronic device according to one embodiment of the present application. As shown in fig. 14, the electronic device 1400 may include: the memory 1410, the processor 1420 and the computer program 1430 stored in the memory 1410 and operable on the processor 1420, when the processor 1420 executes the program, implement the method for testing the MIMO wireless terminal according to any of the embodiments described above.

In order to implement the above embodiments, the present application also proposes a computer-readable storage medium having a computer program stored thereon, which when executed by a processor implements the testing method of the MIMO wireless terminal according to any of the above embodiments of the present application.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A method for testing a MIMO wireless terminal, comprising the steps of:

acquiring antenna directional diagram information required by testing and a channel model required by testing;

determining respective channel correlation matrices of the antenna directional diagram at a plurality of angles relative to the channel model according to the antenna directional diagram information and the channel model;

determining a target test state, and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve;

acquiring a target channel correlation matrix corresponding to the target throughput rate test curve;

and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram under a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve.

2. The method of claim 1, wherein determining a target test state comprises:

and determining a target test state according to a preset target antenna directional diagram and the angle of the target antenna directional diagram relative to the channel model.

3. The method of claim 1, wherein obtaining the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrices of the antenna pattern at a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve, and the target throughput rate test curve comprises:

acquiring throughput rate curves of the MIMO wireless terminal relative to the antenna directional diagram relative to the channel model under a plurality of angles according to the respective channel correlation matrixes of the antenna directional diagram relative to the channel model under a plurality of angles, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve;

and acquiring the overall performance value of the MIMO wireless terminal according to the throughput rate curve of the MIMO wireless terminal relative to the antenna directional diagram under a plurality of angles relative to the channel model.

4. The method of claim 3, wherein obtaining throughput curves of the MIMO wireless terminal at a plurality of angles relative to the antenna pattern relative to the channel model based on the respective channel correlation matrices of the antenna pattern at the plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput test curve, and the target throughput test curve comprises:

calculating radio frequency parameter values corresponding to the multiple channel correlation matrixes respectively according to the respective channel correlation matrixes of the MIMO wireless terminal under multiple angles relative to the antenna directional diagram and the channel model;

calculating a radio frequency parameter value corresponding to the target channel correlation matrix according to the target channel correlation matrix corresponding to the target throughput rate test curve;

and calculating throughput rate curves of the MIMO wireless terminal relative to the antenna directional diagram under a plurality of angles relative to the channel model according to the radio frequency parameter values corresponding to the plurality of channel correlation matrixes, the radio frequency parameter value corresponding to the target channel correlation matrix and the target throughput rate test curve.

5. The method of claim 4, wherein calculating respective radio frequency parameter values corresponding to a plurality of channel correlation matrices based on respective channel correlation matrices of the MIMO wireless terminal at a plurality of angles with respect to the antenna pattern with respect to the channel model comprises:

according to respective channel correlation matrixes of the MIMO wireless terminal under a plurality of angles relative to the antenna directional diagram and the channel model, calculating radio frequency parameter values corresponding to the plurality of channel correlation matrixes through a preset formula; wherein the preset formula is expressed as follows:

Where ρ is^txIs defined as all

The product of the values is then raised to the power of T, T is

The number of (2); rho^rxIs defined as all

The product of the values is then raised to the power of R, R being

The number of (2); e represents a mathematical expectation; h is^*(t) denotes the conjugate of h (t); delta N_uRepresenting the noise in dBm of the u-th receiver in the wireless terminal; h is_u,s(t) represents the propagation formula from the s-th transmitter to the u-th receiver signal, h_u,s(t) is also the u row, s column element in the channel correlation matrix; s represents the total number of transmitters; u represents the total number of receivers.

6. The method of claim 4 or 5, wherein calculating the throughput curves of the MIMO wireless terminal at a plurality of angles with respect to the antenna pattern with respect to the channel model according to the RF parameter values corresponding to the plurality of channel correlation matrices, the RF parameter value corresponding to the target channel correlation matrix, and the target throughput test curve comprises:

calculating the offset between the radio frequency parameter value corresponding to each of the plurality of channel correlation matrixes and the radio frequency parameter value corresponding to the target channel correlation matrix;

and calculating throughput rate curves of the MIMO wireless terminal relative to the antenna directional diagram under a plurality of angles relative to the channel model according to the offset between the radio frequency parameter values corresponding to the plurality of channel correlation matrixes and the radio frequency parameter values corresponding to the target channel correlation matrix and the target throughput rate test curve.

7. An OTA test method for a MIMO wireless terminal, comprising:

acquiring antenna directional pattern information of the MIMO wireless terminal and a channel model required by testing;

determining respective channel correlation matrixes of the MIMO wireless terminal under a plurality of postures relative to the channel model according to the antenna directional diagram information and the channel model;

selecting a gesture to be tested from the plurality of gestures, and testing the MIMO wireless terminal in the gesture to be tested to obtain a corresponding target throughput rate test curve;

and acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix and the target throughput rate test curve of the MIMO wireless terminal in a plurality of postures relative to the channel model.

8. An apparatus for testing a MIMO wireless terminal, comprising:

the acquisition module is used for acquiring antenna directional pattern information required by the test and a channel model required by the test;

a channel correlation matrix determining module, configured to determine, according to the antenna pattern information and the channel model, respective channel correlation matrices of the antenna pattern at multiple angles with respect to the channel model;

the test module is used for determining a target test state and testing the MIMO wireless terminal in the target test state to obtain a corresponding target throughput rate test curve;

a target channel correlation matrix obtaining module, configured to obtain a target channel correlation matrix corresponding to the target throughput rate test curve;

and the overall performance acquisition module is used for acquiring the overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix of the antenna directional diagram under a plurality of angles relative to the channel model, the target channel correlation matrix corresponding to the target throughput rate test curve and the target throughput rate test curve.

9. The apparatus of claim 8, wherein the testing module is specifically configured to:

10. The apparatus of claim 8, wherein the overall performance acquisition module comprises:

a first obtaining unit, configured to obtain throughput curves of the MIMO wireless terminal at multiple angles relative to the antenna directional diagram relative to the channel model according to respective channel correlation matrices of the antenna directional diagram at multiple angles relative to the channel model, a target channel correlation matrix corresponding to the target throughput test curve, and the target throughput test curve;

and a second obtaining unit, configured to obtain an overall performance value of the MIMO wireless terminal according to a throughput rate curve of the MIMO wireless terminal at a plurality of angles with respect to the antenna pattern with respect to the channel model.

11. The apparatus of claim 10, wherein the first obtaining unit comprises:

a first calculating subunit, configured to calculate, according to respective channel correlation matrices of the MIMO wireless terminal at a plurality of angles with respect to the antenna pattern with respect to the channel model, radio frequency parameter values corresponding to the plurality of channel correlation matrices;

the second calculating subunit is configured to calculate, according to a target channel correlation matrix corresponding to the target throughput rate test curve, a radio frequency parameter value corresponding to the target channel correlation matrix;

and the third calculating subunit is configured to calculate throughput rate test curves of the antenna directional diagram at multiple angles relative to the channel model according to the radio frequency parameter values corresponding to the multiple channel correlation matrices, the radio frequency parameter value corresponding to the target channel correlation matrix, and the target throughput rate test curve.

12. The apparatus according to claim 11, wherein the first computing subunit is specifically configured to:

Where ρ is^txIs defined as all

The product of the values is then turned to the power of TAnd T is

The number of (2); rho^rxIs defined as all

The product of the values is then raised to the power of R, R being

13. The apparatus according to claim 11 or 12, wherein the third computing subunit is specifically configured to:

14. An OTA testing apparatus for a MIMO wireless terminal, comprising:

the first acquisition module is used for acquiring antenna directional pattern information of the MIMO wireless terminal and a channel model required by testing;

a determining module, configured to determine, according to the antenna pattern information and the channel model, respective channel correlation matrices of the MIMO wireless terminal in a plurality of postures with respect to the channel model;

the test module is used for selecting a gesture to be tested from the gestures and carrying out OTA test on the MIMO wireless terminal in the gesture to be tested to obtain a corresponding target throughput rate test curve;

the second obtaining module is used for obtaining a target channel correlation matrix corresponding to the target throughput rate test curve;

a third obtaining module, configured to obtain an overall performance value of the MIMO wireless terminal according to the respective channel correlation matrix, the target channel correlation matrix, and the target throughput test curve of the MIMO wireless terminal in multiple postures with respect to the channel model.

15. A system for testing a MIMO wireless terminal, comprising:

a darkroom in which the MIMO wireless terminal and at least one antenna are placed;

the base station simulator is used for simulating the function of a base station and generating an original signal;

the channel simulator is used for generating a corresponding channel environment according to a channel model required by the test;

a test apparatus of the MIMO wireless terminal according to any one of claims 8 to 13; wherein the base station simulator, the channel simulator and the testing device are arranged outside the darkroom.

16. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor implementing a method of testing a MIMO wireless terminal according to any of claims 1 to 6 when executing the computer program.

17. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method of testing a MIMO wireless terminal according to any one of claims 1 to 6.