Channel model parameter determination method and device and storage medium

Abstract

The invention provides a channel model parameter determination method and device and a storage medium, and relates to the technical field of wireless channel modeling. The method comprises the following steps: acquiring a first channel impulse response (CIR) passing through a plurality of common scatterers between each first transmitting antenna unit and each first receiving antenna unit; according to the first CIR, determining a first channel small-scale parameter set and a first cluster number passing through a plurality of common scatterers between the first transmitting antenna unit and the first receiving antenna unit; and according to the positions of the plurality of first transmitting antenna units, the positions of the plurality of first receiving antenna units, the plurality of first CIRs, the plurality of first channel small-scale parameter sets and the plurality of first cluster numbers, determining a second channel small-scale parameter set and a second cluster number passing through the plurality of common scatterers between the second transmitting antenna unit and the second receiving antenna unit. And the complexity of channel model parameter calculation is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wireless channel modeling, and in particular to a method, device and storage medium for determining channel model parameters. Background Art

[0002] Cluster-based channel models can effectively balance the accuracy and complexity of channel modeling, and are gradually becoming the development trend of wireless channel modeling. Due to the high latency and spatial resolution brought by the large bandwidth and massive antennas of 5G millimeter-wave communication systems, the number of resolvable multipath components (MPCs) in the channel has increased exponentially. The results of a large number of multiple-input multiple-output (MIMO) channel measurements show that MPCs are not independent of each other, but exist in the form of clusters. In particular, when using large antenna arrays and large bandwidths to measure channels, millimeter-wave wireless channels exhibit sparsity, so clustering has become an important topic in 5G research.

[0003] When a very large-scale MIMO antenna array is deployed on the base station side, due to the huge number of antenna units in the very large-scale MIMO antenna array, the signals transmitted by different transmitting antenna units will be reflected to the receiving antenna unit through different scatterers, making the channel between the base station and the terminal exhibit spatial non-stationary characteristics. In order to remove the influence of spatial non-stationary characteristics on channel modeling, it is necessary to calculate the channel small-scale parameters and cluster number for the signals transmitted from each transmitting antenna unit to each receiving antenna unit, which makes the calculation of channel model parameters more complex. Summary of the invention

[0004] The present application provides a method, device and storage medium for determining channel model parameters, which solves the technical problem of high complexity in existing channel model parameter calculations.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a channel model parameter, including:

[0006] Acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers;

[0007] Determine, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers;

[0008] According to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers, a second channel small-scale parameter set and a second cluster number are determined between the second transmitting antenna unit and the second receiving antenna unit through the multiple common scatterers, and the second transmitting antenna unit and the multiple first transmitting antenna units are located at different positions in the same wireless propagation environment.

[0009] In one implementation, determining, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers includes:

[0010] Determine, according to the first CIR, the first channel small-scale parameter set, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are path lengths between the first transmitting antenna unit and the first receiving antenna unit passing through the multiple common scatterers;

[0011] The first number of clusters is determined according to the first channel small-scale parameter set.

[0012] In one implementation, determining the first number of clusters according to the first channel small-scale parameter set includes:

[0013] The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain the first number of clusters.

[0014] In one embodiment, the method further comprises:

[0015] Acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through the plurality of common scatterers and the smart metasurface RIS;

[0016] A third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS is determined according to the first CIR and the second CIR.

[0017] In one embodiment, the method further comprises:

[0018] According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, wherein the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, and the multiple second paths are the paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

[0019] In a second aspect, an embodiment of the present application provides a device for determining a channel model parameter, the device comprising:

[0020] An acquisition unit, used to acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers;

[0021] A first determining unit, configured to determine, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers;

[0022] The second determination unit is used to determine the second channel small-scale parameter set and the second cluster number between the second transmitting antenna unit and the second receiving antenna unit through the multiple common scatterers according to the positions of the multiple first transmitting antenna units, the positions of the multiple first receiving antenna units, the multiple first CIRs, the multiple first channel small-scale parameter sets and the multiple first cluster numbers, and the second transmitting antenna unit and the first transmitting antenna unit are located at different positions in the same wireless propagation environment.

[0023] In one implementation, the first determining unit is specifically configured to:

[0024] Determine, according to the first CIR, the first channel small-scale parameter set, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are path lengths between the first transmitting antenna unit and the first receiving antenna unit passing through the multiple common scatterers;

[0025] The first number of clusters is determined according to the first channel small-scale parameter set.

[0026] In one implementation, the first determining unit is specifically configured to:

[0027] The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain the first number of clusters.

[0028] In one embodiment, the apparatus further includes a third determining unit, wherein:

[0029] The acquisition unit is further used to acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through the multiple common scatterers and the smart metasurface RIS;

[0030] The third determining unit is used to determine a third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS according to the first CIR and the second CIR.

[0031] In one implementation, the apparatus further includes a fourth determining unit, the fourth determining unit being configured to:

[0032] According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, wherein the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, and the multiple second paths are the paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

[0033] In a third aspect, an embodiment of the present application provides a device for determining channel model parameters, the device comprising a memory, a transceiver, a processor,

[0034] The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

[0035] Acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers;

[0036] Determine, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers;

[0037] According to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers, a second channel small-scale parameter set and a second cluster number are determined between the second transmitting antenna unit and the second receiving antenna unit passing through the multiple common scatterers, and the second transmitting antenna unit and the first transmitting antenna unit are located at different positions in the same wireless propagation environment.

[0038] In one implementation, the processor is specifically configured to perform the following operations:

[0039] Determine, according to the first CIR, the first channel small-scale parameter set, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are path lengths between the first transmitting antenna unit and the first receiving antenna unit passing through the multiple common scatterers;

[0040] The first number of clusters is determined according to the first channel small-scale parameter set.

[0041] In one implementation, the processor is specifically configured to perform the following operations:

[0042] The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain the first number of clusters.

[0043] In one implementation, the processor is further configured to perform the following operations:

[0044] Acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through the plurality of common scatterers and the smart metasurface RIS;

[0045] A third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS is determined according to the first CIR and the second CIR.

[0046] In one implementation, the processor is further configured to perform the following operations:

[0047] According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, wherein the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, and the multiple second paths are the paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

[0048] In a fourth aspect, an embodiment of the present application provides a non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method described in the first aspect.

[0049] The embodiment of the present application provides a method, device and storage medium for determining channel model parameters. In the method, a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit passing through multiple common scatterers is obtained; according to the first CIR between any first transmitting antenna unit and any receiving antenna unit passing through multiple common scatterers, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit passing through multiple common scatterers are determined; according to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers, a second channel small-scale parameter set and a second cluster number between the second transmitting antenna unit and the second receiving antenna unit passing through multiple common scatterers are determined. The channel model parameters between the first transmitting antenna unit and the first receiving antenna unit at some positions can be used to determine the channel model parameters between the second transmitting antenna and the second transmitting antenna unit at other positions, thereby reducing the complexity of calculating the channel model parameters.

[0050] It should be understood that the contents described in the above summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0052] Figure 1 A schematic diagram of an application scenario provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of a flow chart of a method for determining channel model parameters provided in an embodiment of the present application;

[0054] Figure 3 A schematic diagram of a flow chart of another method for determining channel model parameters provided in an embodiment of the present application;

[0055] Figure 4 A schematic diagram of channel modeling including RIS provided in an embodiment of the present application;

[0056] Figure 5 A schematic diagram of the structure of a device for determining channel model parameters provided in an embodiment of the present application;

[0057] Figure 6 A schematic diagram of the structure of another device for determining channel model parameters provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0060] The terms "first", "second", etc. in the embodiments of the present application are only used for illustration and to distinguish the objects being described. There is no order, nor does it indicate a special limitation on the number of objects in the embodiments of the present application, and it cannot constitute any limitation on the embodiments of the present application. For example, the descriptions of the first transmitting antenna unit and the second transmitting antenna unit are only used to distinguish transmitting antenna units at different locations, rather than indicating the difference in priority or importance of the two transmitting antenna units.

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] The embodiments of the present application provide a method, device and storage medium for determining channel model parameters, so as to reduce the complexity of calculating channel modeling parameters.

[0063] Among them, the method and the device are based on the same application concept. Since the method and the device solve the problem in a similar principle, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0064] Figure 1 A schematic diagram of an application scenario provided by an embodiment of the present application. Figure 1 As shown, it includes a base station and a terminal. There are multiple common scatterers and reconfigurable intelligent surface (RIS) boards in the propagation environment of the base station and the terminal. The transmitting antenna array on the base station includes multiple transmitting antenna units, and the receiving antenna array on the terminal includes multiple receiving antenna units. The signal transmitted by each transmitting antenna unit is reflected to the receiving antenna unit through multiple common scatterers and RIS boards.

[0065] Ordinary scatterers can be objects with a fixed reflection coefficient, such as buildings.

[0066] RIS is an artificial electromagnetic surface structure with programmable electromagnetic properties, which is composed of a large number of electromagnetic units. The electromagnetic properties of the electromagnetic units can be dynamically controlled through the control circuit to achieve intelligent reconstruction of the wireless signal propagation characteristics in three-dimensional space. It can be used for wireless coverage blind spot filling, wireless coverage expansion, wireless system capacity enhancement, indoor carriages and other scenarios.

[0067] Figure 1 This is only a schematic diagram of an application scenario. The communication method provided in this application can be applied not only to the above scenario, but also to other scenarios.

[0068] In order to establish a cluster-based channel model, it is necessary to first cluster the multipaths in the channel reasonably. If it is not possible to distinguish between clusters that pass through RIS and clusters that do not pass through RIS (i.e., only pass through ordinary scatterers), the clustering results obtained cannot truly reflect the signal propagation environment, thus making the channel model inaccurate.

[0069] In the related art, a clustering method for a RIS in a propagation environment is as follows: first, a propagation channel of a signal from a transmitting antenna unit to a receiving antenna unit is subjectively divided into a direct channel and a cascade channel; wherein, a direct channel refers to a channel in which a signal from a transmitting antenna unit to a receiving antenna unit does not pass through a RIS, and a cascade channel refers to a channel in which a signal from a transmitting antenna unit passes through a RIS unit to reach a receiving antenna unit; then, the cascade channel is divided into two sections of channels, namely, a channel from a transmitting antenna unit to a RIS unit and a channel from a RIS unit to a receiving antenna unit; finally, a channel clustering algorithm is used to cluster the direct channel, the channel from a transmitting antenna unit to a RIS unit, and the channel from a RIS unit to a receiving antenna unit, respectively.

[0070] As the antenna arrays at the transmitting and receiving ends become larger and the number of RIS units increases in the future, the method of clustering the three-segment channels through the cubic channel clustering algorithm will result in a large amount of calculation; in addition, in order to remove the influence of spatial non-stationary characteristics on channel modeling, it is necessary to calculate the channel small-scale parameters and the number of clusters for the signal transmitted from each transmitting antenna unit to each receiving antenna unit, which makes the calculation complexity high.

[0071] Based on the problems in the prior art, the present application proposes the following concept: by determining the channel model parameters between the receiving antenna units and the transmitting antenna units at some positions (including channel small-scale parameters and the number of clusters), the channel model parameters between the receiving antenna units and the transmitting antenna units at other positions can reduce the complexity of the channel model parameter calculation.

[0072] The following is an introduction to the method for determining the channel model parameters provided by the present application in conjunction with specific embodiments.

[0073] Figure 2 A flow chart of a method for determining channel model parameters provided in an embodiment of the present application. Figure 2 As shown, the method includes:

[0074] S201. Obtain a first channel impulse response (CIR) between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers.

[0075] As an example, the execution subject of this embodiment may be a device for determining channel model parameters, and there are many ways to implement the device for determining channel model parameters. For example, it may be program software, or a medium storing relevant computer programs, such as a USB flash drive, etc.; or, the device may also be a physical device integrated or installed with relevant computer programs, such as a chip, an intelligent terminal, a computer, a server, etc.

[0076] The first transmitting antenna unit may be a transmitting antenna unit on a very large-scale MIMO antenna array of a base station, or may be a transmitting antenna unit on a signal measuring device.

[0077] The first receiving antenna unit may be a receiving antenna unit on an antenna array of a terminal, or may be a receiving antenna unit on a signal measuring device.

[0078] The first CIR may also be referred to as a CIR between the first transmitting antenna unit and the first receiving antenna unit without passing through the RIS.

[0079] The first CIR can be measured by a signal measuring device.

[0080] In a possible implementation, the signal measuring device may measure and obtain a first CIR between the first transmitting antenna unit and the first receiving antenna unit through a plurality of common scatterers in the following manner:

[0081] The signal measuring device transmits a first signal through a first transmitting antenna unit. The first signal is reflected to a first receiving antenna unit through a plurality of common scatterers. The first receiving antenna unit measures the received signal to obtain a first CIR.

[0082] In the process of measuring the first CIR, it is necessary to control the RIS so that the first signal passing through the RIS cannot be reflected to the first receiving antenna unit.

[0083] In one possible implementation, controlling the RIS may refer to adjusting the reflection coefficient of the RIS so that the first signal passing through the RIS cannot be reflected to the first receiving antenna unit; controlling the RIS may also refer to physically shielding the RIS so that the first signal passing through the RIS cannot be reflected to the first receiving antenna unit.

[0084] The reflection coefficient of the RIS may be determined according to the position of the first transmitting antenna unit, the position of the RIS, the position of the first receiving antenna unit, the spatial angle between the first transmitting antenna unit and the RIS, and the spatial angle between the RIS and the first receiving antenna unit.

[0085] In the embodiment of the present application, the RIS can be regarded as a scatterer in the environment where the signal propagates from the transmitting end to the receiving end, that is, the entire RIS can be regarded as a scatterer, rather than the reflection unit of the RIS being regarded as a scatterer.

[0086] For ease of understanding, an example of obtaining the first CIR between each first transmitting antenna unit and each first receiving antenna unit through multiple common scatterers is given below:

[0087] If there are four first transmitting antenna units, namely transmitting antenna unit 1, transmitting antenna unit 2, transmitting antenna unit 3 and transmitting antenna unit 4, and two first receiving antenna units, namely receiving antenna unit 1 and receiving antenna unit 2, then obtaining the first CIR between each first transmitting antenna unit and each first receiving antenna unit through multiple common scatterers means obtaining the first CIR between transmitting antenna unit 1 and receiving antenna unit 1 through multiple common scatterers, the first CIR between transmitting antenna unit 2 and receiving antenna unit 1 through multiple common scatterers, the first CIR between transmitting antenna unit 3 and receiving antenna unit 1 through multiple common scatterers, the first CIR between transmitting antenna unit 4 and receiving antenna unit 1 through multiple common scatterers, the first CIR between transmitting antenna unit 1 and receiving antenna unit 2 through multiple common scatterers, the first CIR between transmitting antenna unit 2 and receiving antenna unit 2 through multiple common scatterers, the first CIR between transmitting antenna unit 3 and receiving antenna unit 2 through multiple common scatterers, and the first CIR between transmitting antenna unit 4 and receiving antenna unit 2 through multiple common scatterers.

[0088] S202. Determine a first channel small-scale parameter set and a first cluster number between any first transmitting antenna unit and any first receiving antenna unit passing through multiple common scatterers according to a first CIR between the first transmitting antenna unit and any first receiving antenna unit passing through multiple common scatterers.

[0089] In a possible implementation, a first channel small-scale parameter set and a first cluster number of multiple common scatterers between any first transmitting antenna unit and any first receiving antenna unit may be determined according to a first CIR of multiple common scatterers between the first transmitting antenna unit and the first receiving antenna unit in the following manner:

[0090] According to a first CIR of multiple common scatterers between any first transmitting antenna unit and any first receiving antenna unit, a first channel small-scale parameter set of multiple common scatterers between the first transmitting antenna unit and the first receiving antenna unit is determined, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are the paths of the multiple common scatterers between the first transmitting antenna unit and the first receiving antenna unit; according to the first channel small-scale parameter set, a first cluster number of the multiple common scatterers between the first transmitting antenna unit and the first receiving antenna unit is determined.

[0091] For example, Figure 1 As shown, the multiple first paths may be path 3, path 4, path 5 and path 6.

[0092] The small-scale parameters of the channel may include horizontal transmission angle, horizontal arrival angle, vertical transmission angle, vertical arrival angle, delay, amplitude and phase.

[0093] The horizontal transmission angle of any first path refers to the angle between the first path and the first transmitting antenna unit in the horizontal direction.

[0094] The horizontal arrival angle of any first path refers to the angle between the first path and the first receiving antenna unit in the horizontal direction.

[0095] The vertical transmission angle of any first path refers to the angle between the first path and the first transmitting antenna unit in the vertical direction.

[0096] The vertical arrival angle of any first path refers to the angle between the first path and the first receiving antenna unit in the vertical direction.

[0097] The time delay of any first path refers to the time delay caused by the signal transmitted by the first transmitting antenna unit during the transmission process of the first path.

[0098] The amplitude of any first path refers to the signal strength of the signal transmitted by the first transmitting antenna unit during the transmission process of the first path.

[0099] The phase of any first path refers to the phase of a signal transmitted by the first transmitting antenna unit when it is transmitted to the first receiving antenna unit through the first path.

[0100] In a possible implementation manner, the first channel small-scale parameter set may be determined by a channel parameter estimation algorithm.

[0101] Exemplarily, the channel parameter estimation algorithm may be a space-alternating generalized expectation-maximization (SAGE) algorithm.

[0102] In a possible implementation, the first number of clusters may be determined based on the first channel small-scale parameter set in the following manner: based on the first channel small-scale parameter set between any first transmitting antenna unit and any first receiving antenna unit passing through multiple common scatterers, multiple first paths between the first transmitting antenna unit and the first receiving antenna unit passing through multiple common scatterers are clustered to obtain the first number of clusters.

[0103] In a possible implementation manner, the first number of clusters may be determined by using a channel clustering algorithm.

[0104] Exemplarily, the channel clustering algorithm may be a kernel power density algorithm.

[0105] For example, Figure 1 As shown, if the multiple first paths are path 3, path 4, path 5 and path 6, the channel small-scale parameters of the multiple first paths are analyzed by the channel clustering algorithm, and then the multiple first paths are clustered to obtain clustering results. The clustering result can be that path 3, path 4, path 5 and path 6 are divided into two clusters, one cluster includes path 3 and path 4, and the other cluster includes path 5 and path 6.

[0106] S203. Determine a second channel small-scale parameter set and a second cluster number between a second transmitting antenna unit and a second receiving antenna unit through multiple common scatterers according to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets, and multiple first cluster numbers.

[0107] The second transmitting antenna unit and the plurality of first transmitting antenna units are located at different positions in the same wireless propagation environment.

[0108] By way of example, the second transmitting antenna unit and the first transmitting antenna unit may be transmitting antenna units located at different positions on a very large-scale MIMO antenna array of the base station.

[0109] In another example, the first transmitting antenna unit may be a transmitting antenna unit on a signal measuring device, and the second transmitting antenna unit may be a transmitting antenna unit on a base station. The transmitting antenna unit on the signal measuring device and the transmitting antenna unit on the base station are located at different positions in the same wireless propagation environment.

[0110] The first receiving antenna unit and the second receiving antenna unit may be the same, or may be receiving antenna units located at different positions in the same wireless propagation environment.

[0111] In a possible implementation, a second channel small-scale parameter set and a second cluster number between a second transmitting antenna unit and a second receiving antenna unit passing through a plurality of common scatterers may be determined according to positions of a plurality of first transmitting antenna units, positions of a plurality of first receiving antenna units, a plurality of first CIRs, a plurality of first channel small-scale parameter sets, and a plurality of first cluster numbers in the following manner:

[0112] A neural network model is determined according to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers; and a second channel small-scale parameter set and a second cluster number between the second transmitting antenna unit and the second receiving antenna unit through multiple common scatterers are determined according to the neural network model.

[0113] Exemplarily, the neural network model may be a back propagation (BP) neural network model or a radial basis function (RBF) neural network model.

[0114] The positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers can be divided into two parts, one part as training samples and the other part as test samples. The neural network is trained with the training samples to obtain a neural network model, and the neural network model is tested with the test samples to ensure that the neural network model can accurately predict the second channel small-scale parameter set and the second cluster number.

[0115] The input of the neural network model is the position of the second transmitting antenna unit, the position of the second receiving antenna unit, and the CIR of multiple common scatterers between the second transmitting antenna unit and the second receiving antenna unit. The output of the neural network model is the channel small-scale parameter set and the number of clusters between the second receiving antenna unit and the second transmitting antenna unit through multiple common scatterers.

[0116] exist Figure 2 In the illustrated embodiment, a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit passing through multiple common scatterers is obtained; a first channel small-scale parameter set and a first cluster number between any first transmitting antenna unit and any receiving antenna unit passing through multiple common scatterers are determined according to the first CIR between the first transmitting antenna unit and any receiving antenna unit passing through multiple common scatterers; a second channel small-scale parameter set and a second cluster number between the second transmitting antenna unit and the second receiving antenna unit passing through multiple common scatterers are determined according to the positions of the multiple first transmitting antenna units, the positions of the multiple first receiving antenna units, the multiple first CIRs, the multiple first channel small-scale parameter sets and the multiple first cluster numbers. The channel model parameters between the second transmitting antenna unit and the second transmitting antenna unit at other positions can be determined by the channel model parameters between the first transmitting antenna unit and the first receiving antenna unit at some positions, thereby reducing the calculation complexity of the channel model parameters.

[0117] exist Figure 2 Based on the embodiment shown, the following Figure 3 The process of the method for determining the channel model parameters of the present application is described in detail.

[0118] Figure 3 A flow chart of another method for determining channel model parameters provided in an embodiment of the present application. Figure 3 As shown, the method includes:

[0119] S301. Obtain a first CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers.

[0120] It should be noted that the execution process of S301 can refer to the execution process of S201, which will not be repeated here.

[0121] S302: Obtain a second CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers and a RIS.

[0122] The second CIR is measured in the same manner as the first CIR, except that during the measurement of the second CIR, the RIS does not need to be controlled. That is, during the measurement of the second CIR, multiple common scatterers and the RIS can reflect the signal transmitted by the first transmitting antenna unit to the first receiving antenna unit.

[0123] S303: For any first transmitting antenna unit and any first receiving antenna unit, determine a third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS according to the first CIR and the second CIR.

[0124] The first CIR, the second CIR, and the third CIR of any first transmitting antenna unit and any first receiving antenna unit satisfy the following relationship:

[0125] Third CIR = Second CIR - First CIR

[0126] S304. Determine a first channel small-scale parameter set and a first cluster number between any first transmitting antenna unit and any first receiving antenna unit through multiple common scatterers according to a first CIR between the first transmitting antenna unit and the first receiving antenna unit through multiple common scatterers.

[0127] It should be noted that the execution process of S304 can refer to the execution process of S202, which will not be repeated here.

[0128] S305 . Determine a third channel small-scale parameter set between any first transmitting antenna unit and any first receiving antenna unit through the RIS according to a third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS.

[0129] The third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, where the multiple second paths are paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

[0130] For example, Figure 1 As shown, the plurality of second paths may be path 1 and path 2.

[0131] In a possible implementation manner, the third channel small-scale parameter set may be determined by a channel parameter estimation algorithm.

[0132] Exemplarily, the channel parameter estimation algorithm may be a space-alternating generalized expectation-maximization (SAGE) algorithm.

[0133] Since the number of paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is small, it is not necessary to cluster the multiple second paths. If it is necessary to cluster the multiple second paths, a channel clustering algorithm can be used to cluster the multiple second paths.

[0134] S306. Determine a second channel small-scale parameter set and a second cluster number between a second transmitting antenna unit and a second receiving antenna unit through multiple common scatterers based on the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets, and multiple first cluster numbers.

[0135] It should be noted that the method for determining the second channel small-scale parameter set and the second cluster number between the second transmitting antenna unit and the second receiving antenna unit through multiple common scatterers can be referred to the description in S203, which will not be repeated here.

[0136] The method for determining the small-scale parameter set of the third channel between the second transmitting antenna unit and the second receiving antenna unit through RIS can refer to the method for determining the small-scale parameter set of the third channel between the first transmitting antenna unit and the first receiving antenna unit through RIS, which will not be repeated here.

[0137] exist Figure 3In the illustrated embodiment, the channel small-scale parameters of multiple first paths between the transmitting antenna unit and the receiving antenna unit that pass through multiple common scatterers (i.e., not passing through RIS) and the channel small-scale parameters of multiple second paths that pass through RIS can be correctly determined through the first CIR and the second CIR between the transmitting antenna unit and the receiving antenna unit; that is, the multiple first paths that do not pass through RIS and the multiple second paths that pass through RIS between the transmitting antenna unit and the receiving antenna unit can be correctly distinguished through the first CIR and the second CIR between the transmitting antenna unit and the receiving antenna unit, so that the clustering result can truly model the propagation environment of the signal. In addition, the channel model parameters between the first transmitting antenna unit and the first receiving antenna unit at some positions can be determined first, and then the channel model parameters between the second transmitting antenna and the second transmitting antenna unit at other positions can be determined based on the channel model parameters between the first transmitting antenna unit and the first receiving antenna unit at some positions, thereby reducing the calculation complexity of the channel model parameters.

[0138] For ease of understanding, below, combined Figure 4 , taking the antenna array in which the first transmitting antenna unit and the second transmitting antenna unit are located at the same transmitting end, and the first receiving antenna unit and the second receiving antenna unit are the same as an example, the process of determining the channel model parameters of the present application is described in detail.

[0139] like Figure 4 As shown, the transmitting end has M*N antenna units, and the coordinates of the center of the transmitting end antenna array are (0,0,0); the receiving end has S antenna units, and the S antenna units are both the first receiving antenna units and the second receiving antenna units; the coordinates of the center of the receiving end antenna array are (d,0,0); RIS has P*Q reflection units, and the coordinates of the center of RIS are (x RIS ,y RIS ,z RIS ).

[0140] The reflection coefficient matrix of each reflection unit in RIS is:

[0141]

[0142] Where, the phase shift θ n =[0,2π), amplitude adjustment coefficient β n ∈[0,1], n=1,…,N. In the embodiment of the present application, RIS does not adjust the amplitude of the signal, so β n =1.

[0143] (1) According to the coordinates of the center of the transmitting antenna array, the coordinates of the receiving antenna array, and the coordinates of the RIS center, the phase of the P*Q reflection units of the RIS is designed to obtain θ n =α n , where αn ∈(0,2π).

[0144] (2) Treat RIS as a scatterer in the environment where the signal propagates from the transmitter to the receiver.

[0145] (3) Block RIS, at the receiving end antenna unit Rx s , (s=1) measure the received transmission antenna unit Rx s , (s = 1) The CIR (first CIR) of the impulse signal transmitted is recorded as

[0146] (4) Do not block RIS, at the receiving end antenna unit Rx s , (s=1) measure the received transmit antenna unit Tx m,n , (m=1,n=1) The CIR (second CIR) of the impulse signal transmitted is recorded as

[0147] (5) Use the Subtract the value in step (3) The difference is the receiving antenna unit Rx s , (s=1) and the transmitting antenna unit Tx m,n , (m=1,n=1) The CIR (third CIR) of the impulse signal passing through RIS is recorded as

[0149] (6) Repeat steps (3) to (5) to complete the channel measurement between each antenna unit at the transmitting end and each antenna unit at the receiving end, and calculate the third CIR of each transmitting and receiving antenna unit pair, which is recorded as

[0150] (7) Select the antenna unit on the right side of the Z axis on the transmitting end antenna array as the first transmitting antenna unit, and the third CIR between it and all the antenna units on the receiving end through the RIS, and the first CIR that has not gone through RIS,

[0151] (8) Select the transmit and receive antenna pair Rx in step (7) s ,(s=1),Tx m,n , (m=1, n=1) (i.e., the third CIR between the first transmitting antenna unit and the first receiving antenna unit) through the RIS, The SAGE algorithm was used to estimate the total number of L1 m,n,s, (m=1,n=1,s=1) path (second path), its channel small-scale parameter set (corresponding to the third channel small-scale parameter set) is:

[0152] Horizontal launch angle,

[0153] Horizontal angle of arrival,

[0154] Vertical launch angle,

[0155] Vertical angle of arrival,

[0156] Delay,

[0157] Amplitude,

[0158] Phase,

[0159] Select the transmitting and receiving antenna pair Rx in step (7) s ,(s=1),Tx m,n ,(m=1,n=1) The first CIR that has not passed RIS,

[0160] The total number of L2 cells without RIS was estimated by SAGE algorithm. m,n,s , (m=1,n=1,s=1) path (first path), its channel small-scale parameter set (corresponding to the first channel small-scale parameter set) is:

[0161] Horizontal launch angle,

[0162] Horizontal angle of arrival,

[0163] Vertical launch angle,

[0164] Vertical angle of arrival,

[0165] Delay,

[0166] Amplitude,

[0167] Phase,

[0168] (9) Repeat step (8) to determine the channel small-scale parameter sets (i.e., a set of multiple third channel small-scale parameter sets) after RIS for all the selected transmit and receive antenna unit pairs (corresponding to multiple first transmit antenna units and multiple first receive antenna units) in step (7):

[0169] Horizontal launch angle,

[0170] Horizontal angle of arrival,

[0171] Vertical launch angle,

[0172] Vertical angle of arrival,

[0173] Delay,

[0174] Amplitude,

[0175] Phase,

[0176] And the channel small-scale parameter sets of all the selected transmitting and receiving antenna unit pairs in step (7) that have not undergone RIS (i.e., a set consisting of multiple first channel small-scale parameter sets):

[0177] Horizontal launch angle,

[0178] Horizontal angle of arrival,

[0179] Vertical launch angle,

[0180] Vertical angle of arrival,

[0181] Delay,

[0182] Amplitude,

[0183] Phase,

[0184] (10) Select Rx obtained in step (9) s ,(s=1) and Tx m,n, (m=1,n=1) The channel small-scale parameter set that has not been RIS (corresponding to the first channel small-scale parameter set) is extracted using the kernel power density method. m,n,s , (m=1,n=1,s=1) paths (first paths) are clustered until the clustering standard (such as the clustering standard based on the distance indicator) is reached, so that the clustering result is more consistent with the real channel model, and the number of clusters (corresponding to the first number of clusters) is C m,n,s ,(m=1,n=1,s=1).

[0185] (11) Repeat step (10) to cluster the multiple first paths between each antenna unit on the right side of the Z axis on the transmitting end antenna array and each antenna unit on the receiving end that do not pass through RIS in step (7) to obtain the number of clusters (i.e., the cluster number set composed of multiple first cluster numbers): C m,n,s , (m=1,…,M / 2,n=1,…,N,s=1,…,S).

[0186] (12) Place the antenna unit Tx on the right side of the Z axis and the left side of the Y axis on the transmitting end antenna array. m,n , (m=1,…,M / 2,n=1,…,N / 2) position coordinates, all antenna units Rx on the receiving antenna array s , (s=1,…,S), and the first CIR, channel small-scale parameter set and cluster number between the transmitting and receiving antenna units without RIS as training samples; the antenna unit Tx on the right side of the Z axis and the left side of the Y axis on the transmitting antenna array m,n , (m=1,…,M / 2,n=N / 2+1,…,N) position coordinates, all antenna units Rx on the receiving antenna array s , (s=1,…,S), as well as the first CIR between the transmitting and receiving antenna units without RIS, the channel small-scale parameter set and the number of clusters are used as test samples.

[0187] (13) Using the training samples of step (12) to train the neural network to obtain a neural network model; and testing the trained neural network model using the test samples of step (12).

[0188] (14) Use the neural network model trained in step (13) to predict the channel small-scale parameter set (corresponding to the second channel small-scale parameter set) and the number of clusters (corresponding to the second number of clusters) between the antenna unit on the left side of the Z axis of the transmitting antenna array (corresponding to the second transmitting antenna unit) and the receiving antenna unit.

[0189] Figure 5 A schematic diagram of a device for determining channel model parameters provided in an embodiment of the present application. Figure 5As shown, the device includes: a memory 510, a transceiver 520 and a processor 530.

[0190] A memory 510, used for storing computer programs;

[0191] The transceiver 520 is used to send and receive data under the control of the processor 530;

[0192] The processor 530 is configured to read the computer program stored in the memory 510 and perform the following operations:

[0193] Acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers;

[0194] Determine a first channel small-scale parameter set and a first cluster number between a first transmitting antenna unit and a first receiving antenna unit through a plurality of common scatterers according to the first CIR;

[0195] According to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers, a second channel small-scale parameter set and a second cluster number are determined between the second transmitting antenna unit and the second receiving antenna unit through multiple common scatterers. The second transmitting antenna unit and the first transmitting antenna unit are located at different positions in the same wireless propagation environment.

[0196] In one implementation, the processor 530 is specifically configured to perform the following operations:

[0197] Determine a first channel small-scale parameter set according to the first CIR, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are paths between the first transmitting antenna unit and the first receiving antenna unit passing through multiple common scatterers;

[0198] A first number of clusters is determined according to a first channel small-scale parameter set.

[0199] In one implementation, the processor 530 is specifically configured to perform the following operations:

[0200] The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain a first number of clusters.

[0201] In one implementation, the processor 530 is further configured to perform the following operations:

[0202] Acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers and a smart metasurface RIS;

[0203] A third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS is determined according to the first CIR and the second CIR.

[0204] In one implementation, the processor 530 is further configured to perform the following operations:

[0205] According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, where the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, where the multiple second paths are paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

[0206] Among them, Figure 5 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 530 and various circuits of memory represented by memory 510 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 520 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 530 is responsible for managing the bus architecture and general processing, and the memory 510 may store data used by the processor 530 when performing operations.

[0207] Optionally, processor 530 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0208] It should be noted here that the above-mentioned channel model parameter determination device provided in the present application can implement all the method steps in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0209] Figure 6 A schematic diagram of the structure of another device for determining channel model parameters provided in an embodiment of the present application. Figure 6 As shown, the device 600 includes:

[0210] An acquisition unit 610 is configured to acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers;

[0211] A first determining unit 620 is configured to determine a first channel small-scale parameter set and a first cluster number between a first transmitting antenna unit and a first receiving antenna unit through a plurality of common scatterers according to the first CIR;

[0212] The second determination unit 630 is used to determine the second channel small-scale parameter set and the second cluster number between the second transmitting antenna unit and the second receiving antenna unit through multiple common scatterers according to the positions of the multiple first transmitting antenna units, the positions of the multiple first receiving antenna units, the multiple first CIRs, the multiple first channel small-scale parameter sets and the multiple first cluster numbers, and the second transmitting antenna unit and the first transmitting antenna unit are located at different positions in the same wireless propagation environment.

[0213] In one implementation, the first determining unit is specifically configured to:

[0214] Determine a first channel small-scale parameter set according to the first CIR, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are paths between the first transmitting antenna unit and the first receiving antenna unit passing through multiple common scatterers;

[0215] A first number of clusters is determined according to a first channel small-scale parameter set.

[0216] In one implementation, the first determining unit is specifically configured to:

[0217] The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain a first number of clusters.

[0218] In one embodiment, the device further includes a third determining unit, wherein:

[0219] The acquisition unit is further used to acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through multiple common scatterers and the smart metasurface RIS;

[0220] The third determining unit is used to determine a third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS according to the first CIR and the second CIR.

[0221] In one embodiment, the apparatus further includes a fourth determining unit, the fourth determining unit being configured to:

[0222] According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, where the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, where the multiple second paths are paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

[0223] It should be noted here that the above-mentioned channel model parameter determination device provided in the present application can implement all the method steps in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0224] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0225] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0226] An embodiment of the present application further provides a non-transitory readable storage medium, which stores a computer program, and the computer program is used to enable a processor to execute all the method steps in the above method embodiment.

[0227] Non-transitory readable storage media can be any available media or data storage devices that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0228] An embodiment of the present application also provides a computer program product, including a computer program, which implements the method described in any one of the above method embodiments when the computer program is executed by a processor.

[0229] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0230] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0231] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0232] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0233] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for determining channel model parameters, characterized in that: include: Acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers; Determine, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers; According to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers, a second channel small-scale parameter set and a second cluster number are determined between the second transmitting antenna unit and the second receiving antenna unit through the multiple common scatterers, and the second transmitting antenna unit and the multiple first transmitting antenna units are located at different positions in the same wireless propagation environment.

2. The method according to claim 1, characterized in that The determining, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit passing through the plurality of common scatterers includes: Determine, according to the first CIR, the first channel small-scale parameter set, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are path lengths between the first transmitting antenna unit and the first receiving antenna unit passing through the multiple common scatterers; The first number of clusters is determined according to the first channel small-scale parameter set.

3. The method according to claim 2, characterized in that The determining the first number of clusters according to the first channel small-scale parameter set includes: The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain the first number of clusters.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through the plurality of common scatterers and the smart metasurface RIS; A third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS is determined according to the first CIR and the second CIR.

5. The method according to claim 4, characterized in that The method further comprises: According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, wherein the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, and the multiple second paths are the paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

6. A device for determining channel model parameters, characterized in that: The device comprises: An acquisition unit, used to acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers; A first determining unit, configured to determine, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers; The second determination unit is used to determine the second channel small-scale parameter set and the second cluster number between the second transmitting antenna unit and the second receiving antenna unit through the multiple common scatterers according to the positions of the multiple first transmitting antenna units, the positions of the multiple first receiving antenna units, the multiple first CIRs, the multiple first channel small-scale parameter sets and the multiple first cluster numbers, and the second transmitting antenna unit and the first transmitting antenna unit are located at different positions in the same wireless propagation environment.

7. A device for determining channel model parameters, characterized in that: The device includes a memory, a transceiver, a processor, The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Acquire a first channel impulse response CIR between each first transmitting antenna unit and each first receiving antenna unit through a plurality of common scatterers; Determine, according to the first CIR, a first channel small-scale parameter set and a first cluster number between the first transmitting antenna unit and the first receiving antenna unit through the plurality of common scatterers; According to the positions of multiple first transmitting antenna units, the positions of multiple first receiving antenna units, multiple first CIRs, multiple first channel small-scale parameter sets and multiple first cluster numbers, a second channel small-scale parameter set and a second cluster number are determined between the second transmitting antenna unit and the second receiving antenna unit passing through the multiple common scatterers, and the second transmitting antenna unit and the first transmitting antenna unit are located at different positions in the same wireless propagation environment.

8. The device according to claim 7, characterized in that The processor is specifically configured to perform the following operations: Determine, according to the first CIR, the first channel small-scale parameter set, where the first channel small-scale parameter set includes channel small-scale parameters of multiple first paths, where the multiple first paths are path lengths between the first transmitting antenna unit and the first receiving antenna unit passing through the multiple common scatterers; The first number of clusters is determined according to the first channel small-scale parameter set.

9. The device according to claim 8, characterized in that The processor is specifically configured to perform the following operations: The plurality of first paths are clustered according to the first channel small-scale parameter set to obtain the first number of clusters.

10. The device according to any one of claims 7 to 9, characterized in that The processor is further configured to perform the following operations: Acquire a second CIR between each first transmitting antenna unit and each first receiving antenna unit through the plurality of common scatterers and the smart metasurface RIS; A third CIR between the first transmitting antenna unit and the first receiving antenna unit through the RIS is determined according to the first CIR and the second CIR.

11. The device according to claim 10, characterized in that The processor is further configured to perform the following operations: According to the third CIR, a third channel small-scale parameter set between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS is determined, wherein the third channel small-scale parameter set includes channel small-scale parameters of multiple second paths, and the multiple second paths are the paths between the first transmitting antenna unit and the first receiving antenna unit passing through the RIS.

12. A non-transitory readable storage medium, characterized in that: The non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method according to any one of claims 1 to 5.

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