CN112039608A - Method, device and equipment for evaluating multi-antenna terminal and computer storage medium - Google Patents
Method, device and equipment for evaluating multi-antenna terminal and computer storage medium Download PDFInfo
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Abstract
The embodiment of the application provides an evaluation method, an evaluation device and a computer storage medium for a multi-antenna terminal, wherein the evaluation method for the multi-antenna terminal is applied to an evaluation system, and the method comprises the following steps: acquiring antenna array surface information of a base station, channel information of a first wireless channel and information of each probe in a multi-probe darkroom; generating a phase shift matrix of the phase shifter according to the antenna array surface information and the channel information; acquiring the weight of each probe in the multi-probe darkroom according to the channel information and the information of each probe; and acquiring the channel response of the first channel according to the phase offset matrix and the weight of each probe. The embodiment of the application can reflect the performance of the multi-antenna terminal in a real network environment, and solves the technical problem that the evaluation effect of the multi-antenna terminal in the prior art is poor.
Description
Technical Field
The present application relates to the field of wireless communications, and in particular, to a method, an apparatus, a device, and a computer storage medium for evaluating a multi-antenna terminal.
Background
With the continuous development of wireless communication technology, the doubling of the number of base stations and terminal antennas is the key for realizing the performance jump of 5G, and the introduction of new technologies such as large-scale antennas, beam forming, uplink multiple-in multiple-out (MIMO) and the like provides severe tests for the baseband algorithm, multi-antenna design and the like of terminals. In the actual terminal using process, the performance of the multi-antenna terminal is a key factor influencing the user rate experience. At present, no mature system and scheme can quantitatively evaluate the influence of the evolution technology on the performance of the multi-antenna terminal, so that the multi-antenna terminal performance evaluation method with reasonable design is very important. But the evaluation effect of the prior art on the multi-antenna terminal is poor.
Disclosure of Invention
The embodiment of the application provides an evaluation method, an evaluation device, evaluation equipment and a computer storage medium for a multi-antenna terminal, which can solve the technical problem of poor evaluation effect on the multi-antenna terminal in the prior art.
In a first aspect, an embodiment of the present application provides an evaluation method for a multi-antenna terminal, where the method is applied to an evaluation system, and the evaluation system is in communication connection with a target multi-antenna terminal; the evaluation system includes: the system comprises a base station, a phase shifter, a channel simulator and a probe of a multi-probe darkroom; the base station is connected with a phase shifter, and the phase shifter is connected with a channel simulator; the channel simulator is connected with the probe;
the base station is used for receiving and transmitting wireless signals;
the phase shifter is used for shifting the phase of the wireless signal;
the channel simulator is used for simulating and generating a first channel, and the first channel comprises a plurality of clusters;
the probes of the multi-probe darkroom are used for outputting or inputting wireless signals;
the method for evaluating the multi-antenna terminal comprises the following steps:
acquiring antenna array surface information of a base station, channel information of a first wireless channel and information of each probe in a multi-probe darkroom;
generating a phase shift matrix of the phase shifter according to the antenna array surface information and the channel information;
acquiring the weight of each probe in the multi-probe darkroom according to the channel information and the information of each probe;
and acquiring the channel response of the first channel according to the phase offset matrix and the weight of each probe.
Further, in one embodiment, generating a phase shift matrix for the phase shifters based on the antenna wavefront information and the channel information comprises:
respectively calculating second distances between clusters in the first channel and antenna oscillators corresponding to the antenna array planes according to first distances of the wireless signals from the center point of the antenna array planes to pass through the clusters in the first channel within preset time and the departure angles of the clusters in the first channel;
a phase shift matrix is generated based on the first distance, the second distance, and the wavelength of the first channel.
Further, in one embodiment, the phase shift matrix is generated by the following equation:
wherein, therein
Is the phase shift of the cluster, j is the complex number, λ is the wavelength of the first channel, r is the first distance, d1Is the second distance.
Further, in one embodiment, obtaining probe weights for the multi-probe darkroom based on the channel information and the probe information comprises:
calculating the spatial correlation of the first channel according to the arrival angle of each cluster in the first channel and the angle of each probe in the multi-probe darkroom;
and calculating the spatial correlation by adopting a convex optimization algorithm to obtain the weight of each probe.
In a second aspect, an embodiment of the present application provides an evaluation apparatus for a multi-antenna terminal, where the apparatus is applied to an evaluation system, and the evaluation system is in communication connection with a target multi-antenna terminal; the evaluation system includes: the system comprises a base station, a phase shifter, a channel simulator and a probe of a multi-probe darkroom; the base station is connected with a phase shifter, and the phase shifter is connected with a channel simulator; the channel simulator is connected with the probe;
the base station is used for receiving and transmitting wireless signals;
the phase shifter is used for shifting the phase of the wireless signal;
the channel simulator is used for simulating and generating a first channel, and the first channel comprises a plurality of clusters;
the probes of the multi-probe darkroom are used for outputting or inputting wireless signals;
the device includes:
the acquisition module is used for acquiring antenna array surface information of a base station, channel information of a first wireless channel and information of each probe in a multi-probe darkroom;
the generating module is used for generating a phase shift matrix of the phase shifter according to the antenna array surface information and the channel information;
the acquisition module is also used for acquiring the weight of each probe in the multi-probe darkroom according to the channel information and the information of each probe;
and the acquisition module is further used for acquiring the channel response of the first channel according to the phase offset matrix and the weight of each probe.
Further, in an embodiment, the generating module is specifically configured to:
respectively calculating second distances between clusters in the first channel and antenna oscillators corresponding to the antenna array planes according to first distances of the wireless signals from the center point of the antenna array planes to pass through the clusters in the first channel within preset time and the departure angles of the clusters in the first channel;
a phase shift matrix is generated based on the first distance, the second distance, and the wavelength of the first channel.
Further, in one embodiment, the phase shift matrix is generated by the following equation:
wherein, therein
Is the phase shift of the cluster, j is the complex number, λ is the wavelength of the first channel, r is the first distance, d1Is the second distance.
Further, in an embodiment, the obtaining module is specifically configured to:
calculating the spatial correlation of the first channel according to the arrival angle of each cluster in the first channel and the angle of each probe in the multi-probe darkroom;
and calculating the spatial correlation by adopting a convex optimization algorithm to obtain the weight of each probe.
In a third aspect, an embodiment of the present application provides an evaluation device for a multi-antenna terminal, where the evaluation device for the multi-antenna terminal includes: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing an evaluation method of a multi-antenna terminal according to any one of the claims to.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which an implementation program for information transfer is stored, where the program, when executed by a processor, implements the method for evaluating a multi-antenna terminal according to any one of claims to the following claims.
According to the method, the device and the equipment for evaluating the multi-antenna terminal and the computer storage medium, the base station is introduced to evaluate the performance of the multi-antenna terminal, the phase shifter is introduced to reduce the complexity of the system, the channel simulator is combined to generate the wireless channel, the end-to-end real interaction process between the multi-antenna terminal and the base station is restored, the performance of the multi-antenna terminal under the real network environment can be reflected, and the evaluation of the multi-antenna terminal is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of an evaluation method for a multi-antenna terminal according to an embodiment of the present application;
FIG. 2-a is a schematic structural diagram of an evaluation system provided in an embodiment of the present application;
FIG. 2-b is a schematic diagram of a signal interaction pattern of an evaluation system according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an evaluation apparatus of a multi-antenna terminal according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an evaluation device of a multi-antenna terminal according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
With the continuous development of wireless communication technology, the multiple increase of the number of base stations and terminal antennas is the key for realizing performance jump of 5G, and the introduction of new technologies such as large-scale antenna scheduling, beam forming, uplink MIMO and the like provides a rigorous test for a baseband algorithm, multi-antenna design and the like of a terminal. In the actual terminal using process, the performance of the multi-antenna terminal is a key factor influencing the user rate experience. At present, no mature system and scheme can quantitatively evaluate the influence of the evolution technology on the performance of the multi-antenna terminal, so that the multi-antenna terminal performance evaluation method with reasonable design is very important.
The current methods for evaluating the performance of the multi-antenna terminal are mainly divided into two evaluation methods based on a reverberation chamber and a darkroom. The fundamental principle of the scheme based on the reverberation chamber is that a specific Rayleigh channel environment is constructed to evaluate and test by utilizing the characteristic of rich emission in the reverberation chamber, and the scheme is small in size, low in cost and easy to build. But the reverberation room is statistically isotropic in the spatial domain in the test area, not according to the directional characteristics of the actual channel, and the horizontal polarization and the vertical polarization are equal, and the terminal cannot receive signals by utilizing polarization diversity. Resulting in the reverberation room based scheme not being consistent with the actual channel situation and can only be used as a reference.
The darkroom-based multi-antenna performance evaluation method is divided into a two-step method and a multi-probe darkroom-based method. The two-step method is that the antenna directional diagram information of the terminal is obtained in the first step, and the multi-antenna performance is tested in a conduction mode in the second step. The scheme has the advantages of low manufacturing cost and the disadvantages that the antenna directional diagram of the terminal needs to be obtained in advance, the terminal needs to be closely matched with the information, and for the third-party performance test, the accurate antenna directional diagram is difficult to obtain, so that the performance test result of the multi-antenna terminal is influenced. Meanwhile, as 5G evolves to a millimeter wave frequency band, the terminal cannot support conduction testing, resulting in poor scalability of the two-step method.
The system consists of a base station simulator, a channel simulator and a multi-probe darkroom, and uplink antenna signals of the terminal are directly fed back to the base station simulator through a communication antenna. The method is characterized in that a specific use scene is simulated in a multi-probe darkroom through a base station simulator and a channel simulator, and the multi-antenna performance of the terminal under different scenes is evaluated.
However, the multi-antenna terminal performance evaluation based on the multi-probe darkroom method still has the following disadvantages:
first, the currently mainstream multi-probe darkroom method uses a base station simulator to simulate a base station signal. With the continuous evolution of communication technology, the number of antennas of a base station is multiplied, and a scheduling algorithm is more and more complex. The base station simulator is limited by the number of ports, cannot adopt technologies such as beam forming and link self-adaption, cannot replace actual performance of a real base station, and cannot accurately simulate multi-antenna performance in a real network environment of a terminal.
Secondly, in the existing mainstream technical scheme, because the base station simulator cannot truly simulate the scheduling scheme of the base station, and channel information does not need to be acquired through the terminal uplink antenna signal, the terminal uplink antenna signal is directly fed back to the base station simulator through the communication antenna. The whole system can not reflect the real channel condition in the uplink antenna signal, can not realize the advantage of reciprocity between the uplink and the downlink of the TDD system, and can not really evaluate the uplink performance of the terminal.
In order to solve the problem of the prior art, embodiments of the present application provide an evaluation method, apparatus, device, and computer storage medium for a multi-antenna terminal. According to the embodiment of the application, the base station is introduced to evaluate the performance of the multi-antenna terminal, the phase shifter is introduced to reduce the complexity of the system, and the wireless channel is generated by combining the channel simulator, so that the end-to-end real interaction process between the multi-antenna terminal and the base station is restored, the performance of the multi-antenna terminal under the real network environment can be reflected, and the evaluation of the multi-antenna terminal is more accurate. First, an evaluation method of a multi-antenna terminal provided in the embodiment of the present application is described below.
Fig. 1 is a flowchart illustrating an evaluation method for a multi-antenna terminal according to an embodiment of the present application. The evaluation method of the multi-antenna terminal is applied to an evaluation system, and fig. 2-a shows the evaluation system provided by an embodiment of the application, as shown in fig. 2-a, the evaluation system is in communication connection with a target multi-antenna terminal; the evaluation system includes: the system comprises a base station, a phase shifter, a channel simulator and a probe of a multi-probe darkroom; the base station is connected with a phase shifter, and the phase shifter is connected with a channel simulator; the channel emulator is connected to the probe. Fig. 2-b shows a signal interaction pattern diagram of the evaluation system.
The base station is used for receiving and transmitting wireless signals, the wireless signals comprise uplink antenna signals and downlink antenna signals, and the transmission paths of the uplink antenna signals are as follows in sequence: the system comprises a multi-antenna terminal, a probe of a multi-probe darkroom, a channel simulator, a phase shifter and a base station; the uplink antenna signal transmission path which is directly sent from the multi-antenna terminal to the base station simulator and is simulated in the prior art is intersected, so that the transmission condition of the downlink antenna signal under the real network environment can be reflected. The transmission path of the downlink antenna signal is opposite to the transmission path of the uplink antenna signal.
The phase shifter is used for shifting the phase of the wireless signal. The number of the 5G base station ports is multiplied compared with other types of base stations, so that the requirement on the number of the channel simulator ports is high, and further, the system is complex. The base station is connected with the channel simulator through the phase shifter, and the requirement of the base station on the channel simulator is low based on more ports of the phase shifter.
The channel emulator is configured to generate a first channel in an analog manner, the first channel including a plurality of clusters. The channel simulator may include an uplink channel simulator and a downlink channel simulator, where the uplink channel simulator is configured to transmit uplink antenna signals, and the downlink channel simulator is configured to transmit downlink antenna signals.
The probe of the multi-probe darkroom is used for outputting or inputting wireless signals. The probes of the multi-probe darkroom can comprise an uplink probe and a downlink probe, and the uplink probe and the downlink probe are respectively used for transmitting an uplink antenna signal and a downlink antenna signal.
In an embodiment, the evaluation system provided by the present application may further include a low noise amplifier, where the low noise amplifier includes an uplink low noise amplifier and a downlink low noise amplifier, the uplink low noise amplifier is disposed between the uplink probe and the uplink channel emulator, and the downlink low noise amplifier is disposed between the downlink probe and the downlink channel emulator. The uplink low noise amplifier and the downlink low noise amplifier are respectively used for amplifying an uplink antenna signal and a downlink antenna signal and respectively used for suppressing uplink antenna signal noise and downlink antenna signal noise.
The evaluation system provided by the present application is introduced above, and the evaluation method of the multi-antenna terminal provided by the present application is introduced below with reference to fig. 1. As shown in fig. 1, the method may include the steps of:
s110, acquiring antenna array information of the base station, channel information of the first wireless channel and information of each probe in the multi-probe darkroom.
In order to accurately reflect the performance of the multi-antenna terminal, it is necessary to obtain antenna array information of the base station interacting with the multi-antenna terminal by wireless signals, channel information of the first wireless channel generated after the interaction between the antenna array information and the multi-antenna terminal, and information of each probe in the multi-probe darkroom through which the wireless signals pass.
And S120, generating a phase shift matrix of the phase shifter according to the antenna array information and the channel information, wherein the phase shift matrix of the phase shifter is a necessary parameter for acquiring the channel response of the first channel.
In one embodiment, S120 may include:
respectively calculating second distances between clusters in the first channel and antenna oscillators corresponding to the antenna array planes according to first distances of the wireless signals from the center point of the antenna array planes to pass through the clusters in the first channel within preset time and the departure angles of the clusters in the first channel;
for example, in an arbitrary predetermined spherical coordinate system, assuming that the antenna array center point O is used as the origin of the spherical coordinate system, and assuming that the wireless signal travels to the point P through the first distance r in the cluster, the coordinates of P are (r, θ)k,φk) Wherein, thetakBeing vertical ones of the exit angles of the clusters, i.e. directedThe line segment OP forms a positive included angle with the z axis of the spherical coordinate system; phi is akIs the horizontal exit angle in the cluster's exit angles, i.e., the angle rotated from the x-axis to OM in a counterclockwise direction as viewed from the positive z-axis, where M is the projection of point P on the xOy plane. The antenna element is static, the coordinates of the antenna element are fixed, and the coordinates of the antenna element can be directly calculated according to the information of the antenna array surface: (r', θ)m,φm) And then, based on the coordinate of P and the antenna array sub-coordinate, the second distance between each cluster in the first channel and the antenna element corresponding to the antenna array surface can be obtained.
And generating a phase shift matrix according to the first distance, the second distance and the wavelength of the first channel, wherein the phase shift matrix represents the phase shift condition of the cluster corresponding to the antenna element.
In one embodiment, the phase shift matrix may be generated by the following equation:
wherein, therein
Is the phase offset of the cluster, j is a complex number selected based on practical engineering application, λ is the wavelength of the first channel, r is a first distance, d1Is the second distance.
And S130, acquiring the weight of each probe in the multi-probe darkroom according to the channel information and the information of each probe.
In one embodiment, S130 may include:
and calculating the spatial correlation of the first channel according to the arrival angle of each cluster in the first channel and the angle of each probe in the multi-probe darkroom.
The spatial correlation ρ may be expressed by the following expression:
wherein d is2Is emptyThe distance between any two points in the middle can be any datum point, for example, any two points can be taken by taking +/-0.1 lambda as a step length, or any two points can be taken by taking the datum point as a circle center and taking a circle with the radius of 0.5 lambda as a circle, wherein the two points are taken at an interval of 30 degrees on the circle; λ is the wavelength of the radio signal, phipIs the angle of arrival, i.e. the angle between the direction of the cluster arriving at the multi-antenna terminal in the predetermined spherical coordinate system and the positive z-axis of the predetermined spherical coordinate system, phiαIs the visual axis angle of the optional two-point connecting line; p is the angular power spectrum.
The spatial correlation function is:
wherein L is the total number of probes and the weight of the probes is
θlThe probe angle may be an up-probe angle or a down-probe angle.
And calculating the spatial correlation by adopting a convex optimization algorithm to obtain the weight of each probe, and during specific calculation, respectively substituting the uplink probe angle and the downlink probe angle into the calculation formula to correspondingly and respectively obtain the uplink probe weight and the downlink probe weight.
In one embodiment, the following convex optimization algorithm may be used to calculate the probe weights:
and S140, acquiring the channel response of the first channel according to the phase offset matrix and the weight of each probe.
In one embodiment, the phase shift matrix and the weights of the probes may be input into the 38.901 channel coefficient formula of 3GPP, i.e., the channel response of the first channel may be obtained.
Fig. 1-2 illustrate an invalid retransmission packet reduction method, and the following describes an apparatus provided by an embodiment of the present application with reference to fig. 3 and 4.
Fig. 3 is a schematic structural diagram illustrating an evaluation apparatus of a multi-antenna terminal according to an embodiment of the present application, where each module in the apparatus shown in fig. 3 has a function of implementing each step in fig. 1, and can achieve its corresponding technical effect. The device is applied to the evaluation system described in the embodiment of the invalid retransmission packet reduction method provided by the application. As shown in fig. 3, the apparatus may include:
the acquiring module 210 is configured to acquire antenna array information of the base station, channel information of the first wireless channel, and information of each probe in the multi-probe darkroom.
In order to accurately reflect the performance of the multi-antenna terminal, it is necessary to obtain antenna array information of the base station interacting with the multi-antenna terminal by wireless signals, channel information of the first wireless channel generated after the interaction between the antenna array information and the multi-antenna terminal, and information of each probe in the multi-probe darkroom through which the wireless signals pass.
A generating module 220, configured to generate a phase shift matrix of the phase shifter according to the antenna array information and the channel information.
The phase shift matrix of the phase shifter is an essential parameter for obtaining the channel response of the first channel.
In one embodiment, the production module 220 may be specifically configured to:
and respectively calculating second distances between each cluster in the first channel and the antenna oscillator corresponding to the antenna array according to the first distance of the wireless signal from the center point of the antenna array through each cluster in the first channel within preset time and the departure angle of each cluster in the first channel.
For example, in an arbitrary predetermined spherical coordinate system, assuming that the antenna array center point O is used as the origin of the spherical coordinate system, and assuming that the wireless signal travels to the point P through the first distance r in the cluster, the coordinates of P are (r, θ)k,φk) Wherein，θkThe angle is a vertical angle of departure in the angle of departure of the cluster, namely, the positive angle between the directed line segment OP and the z axis of the spherical coordinate system; phi is akIs the horizontal exit angle in the cluster's exit angles, i.e., the angle rotated from the x-axis to OM in a counterclockwise direction as viewed from the positive z-axis, where M is the projection of point P on the xOy plane. The antenna element is static, the coordinates of the antenna element are fixed, and the coordinates of the antenna element can be directly calculated according to the information of the antenna array surface: (r', θ)m,φm) And then, based on the coordinate of P and the antenna array sub-coordinate, the second distance between each cluster in the first channel and the antenna element corresponding to the antenna array surface can be obtained.
And generating a phase shift matrix according to the first distance, the second distance and the wavelength of the first channel, wherein the phase shift matrix represents the phase shift condition of the cluster corresponding to the antenna element.
In one embodiment, the phase shift matrix may be generated by the following equation:
wherein, therein
Is the phase offset of the cluster, j is a complex number selected based on practical engineering application, λ is the wavelength of the first channel, r is a first distance, d1Is the second distance.
The obtaining module 210 is further configured to obtain each probe weight of the multi-probe darkroom according to the channel information and each probe information.
In an embodiment, the obtaining module 210 may be specifically configured to:
and calculating the spatial correlation of the first channel according to the arrival angle of each cluster in the first channel and the angle of each probe in the multi-probe darkroom.
The spatial correlation ρ may be expressed by the following expression:
wherein d is2For example, a reference point can be selected optionally, and any two points are taken by taking +/-0.1 lambda as a step length, or the reference point is taken as a circle center, a circle is made with the radius of 0.5 lambda, and any two points are taken on the circle at an interval of 30 degrees; λ is the wavelength of the radio signal, phipIs the angle of arrival, i.e. the angle between the direction of the cluster arriving at the multi-antenna terminal in the predetermined spherical coordinate system and the positive z-axis of the predetermined spherical coordinate system, phiαIs the visual axis angle of the optional two-point connecting line; p is the angular power spectrum.
The spatial correlation function is:
wherein L is the total number of probes and the weight of the probes is
θlThe probe angle may be an up-probe angle or a down-probe angle.
And calculating the spatial correlation by adopting a convex optimization algorithm to obtain the weight of each probe, and during specific calculation, respectively substituting the uplink probe angle and the downlink probe angle into the calculation formula to correspondingly and respectively obtain the uplink probe weight and the downlink probe weight.
In one embodiment, the following convex optimization algorithm may be used to calculate the probe weights:
and S140, acquiring the channel response of the first channel according to the phase offset matrix and the weight of each probe.
In one embodiment, the phase shift matrix and the weights of the probes may be input into the 38.901 channel coefficient formula of 3GPP, i.e., the channel response of the first channel may be obtained.
Fig. 4 shows a schematic structural diagram of an evaluation device of a multi-antenna terminal according to an embodiment of the present application. As shown in fig. 4, the apparatus may include a processor 301 and a memory 302 storing computer program instructions.
Specifically, the processor 301 may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present Application.
In one example, the Memory 302 may be a Read Only Memory (ROM). In one example, the ROM may be mask programmed ROM, programmable ROM (prom), erasable prom (eprom), electrically erasable prom (eeprom), electrically rewritable ROM (earom), or flash memory, or a combination of two or more of these.
The processor 301 reads and executes the computer program instructions stored in the memory 302 to implement the methods/steps S110 to S140 in the embodiment shown in fig. 1, and achieve the corresponding technical effects achieved by the embodiment shown in fig. 1 executing the methods/steps thereof, which are not described herein again for brevity.
In one example, the evaluation device of the multi-antenna terminal may further include a communication interface 303 and a bus 310. As shown in fig. 4, the processor 301, the memory 302, and the communication interface 303 are connected via a bus 310 to complete communication therebetween.
The communication interface 303 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiment of the present application.
The evaluation device of the multi-antenna terminal may perform the steps of the evaluation method of the multi-antenna terminal in the embodiment of the present application, thereby implementing the evaluation method of the multi-antenna terminal described in fig. 1.
In addition, in combination with the evaluation method of the multi-antenna terminal in the foregoing embodiment, the embodiment of the present application may provide a computer storage medium to implement. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement the method of evaluating a multi-antenna terminal of any of the above embodiments.
It is to be understood that the present application is not limited to the particular arrangements and instrumentality described above and shown in the attached drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions or change the order between the steps after comprehending the spirit of the present application.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic Circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Aspects of the present disclosure are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of 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, 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, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As described above, only the specific embodiments of the present application are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
Claims (10)
1. The method for evaluating the multi-antenna terminal is characterized by being applied to an evaluation system, wherein the evaluation system is in communication connection with a target multi-antenna terminal; the evaluation system includes: the system comprises a base station, a phase shifter, a channel simulator and a probe of a multi-probe darkroom; wherein the base station is connected with the phase shifter, and the phase shifter is connected with the channel emulator; the channel simulator is connected with the probe;
the base station is used for receiving and transmitting wireless signals;
the phase shifter is used for shifting the phase of the wireless signal;
the channel simulator is used for simulating and generating a first channel, and the first channel comprises a plurality of clusters;
the probes of the multi-probe darkroom are used for outputting or inputting the wireless signals;
the method comprises the following steps:
acquiring antenna array surface information of the base station, channel information of the first wireless channel and information of each probe in the multi-probe darkroom;
generating a phase shift matrix of the phase shifter according to the antenna array surface information and the channel information;
acquiring the weight of each probe in the multi-probe darkroom according to the channel information and the information of each probe;
and acquiring the channel response of the first channel according to the phase offset matrix and the weight of each probe.
2. The method for evaluating a multi-antenna terminal according to claim 1, wherein said generating a phase shift matrix of said phase shifter based on said antenna wavefront information and said channel information comprises:
respectively calculating second distances between clusters in the first channel and antenna oscillators corresponding to the antenna array planes according to first distances of the wireless signals from the center points of the antenna array planes to pass through the clusters in the first channel within preset time and the departure angles of the clusters in the first channel;
and generating the phase shift matrix according to the first distance, the second distance and the wavelength of the first channel.
3. The method for evaluating a multi-antenna terminal according to claim 2, wherein the phase shift matrix is generated by the following formula:
wherein, therein
Is the phase offset of the cluster, j is the complex number, λ is the wavelength of the first channel, r is the first channelDistance, d1Is the second distance.
4. The method for evaluating a multi-antenna terminal according to claim 1, wherein said obtaining probe weights for the multi-probe darkroom based on the channel information and the probe information comprises:
calculating the spatial correlation of the first channel according to the arrival angle of each cluster in the first channel and the angle of each probe in the multi-probe darkroom;
and calculating the spatial correlation by adopting a convex optimization algorithm to obtain the weight of each probe.
5. The device for evaluating the multi-antenna terminal is characterized in that the device is applied to an evaluation system which is in communication connection with a target multi-antenna terminal; the evaluation system includes: the system comprises a base station, a phase shifter, a channel simulator and a probe of a multi-probe darkroom; wherein the base station is connected with the phase shifter, and the phase shifter is connected with the channel emulator; the channel simulator is connected with the probe;
the base station is used for receiving and transmitting wireless signals;
the phase shifter is used for shifting the phase of the wireless signal;
the channel simulator is used for simulating and generating a first channel, and the first channel comprises a plurality of clusters;
the probes of the multi-probe darkroom are used for outputting or inputting the wireless signals;
the device comprises:
an obtaining module, configured to obtain antenna array information of the base station, channel information of the first wireless channel, and information of each probe in the multi-probe darkroom;
a generating module, configured to generate a phase shift matrix of the phase shifter according to the antenna array information and the channel information;
the acquisition module is further used for acquiring the weight of each probe in the multi-probe darkroom according to the channel information and the information of each probe;
the obtaining module is further configured to obtain a channel response of the first channel according to the phase offset matrix and the weights of the probes.
6. The apparatus for evaluating a multi-antenna terminal according to claim 5, wherein the generating module is specifically configured to:
respectively calculating second distances between clusters in the first channel and antenna oscillators corresponding to the antenna array planes according to first distances of the wireless signals from the center points of the antenna array planes to pass through the clusters in the first channel within preset time and the departure angles of the clusters in the first channel;
and generating the phase shift matrix according to the first distance, the second distance and the wavelength of the first channel.
7. The apparatus for evaluating a multi-antenna terminal according to claim 6, wherein the phase shift matrix is generated by the following equation:
wherein, therein
Is the phase offset of the cluster, j is a complex number, λ is the wavelength of the first channel, r is the first distance, d1Is the second distance.
8. The apparatus for evaluating a multi-antenna terminal as claimed in claim 5, wherein the obtaining module is specifically configured to:
calculating the spatial correlation of the first channel according to the arrival angle of each cluster in the first channel and the angle of each probe in the multi-probe darkroom;
and calculating the spatial correlation by adopting a convex optimization algorithm to obtain the weight of each probe.
9. An evaluation device of a multi-antenna terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the method of evaluation of a multi-antenna terminal according to any of claims 1 to 4.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon an implementation program of information transfer, which when executed by a processor implements the evaluation method of a multi-antenna terminal according to any one of claims 1 to 4.
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