Communication perception integrated channel modeling method combining target channel and background channel

Abstract

The invention provides a communication perception integrated channel modeling method combining a target channel and a background channel. The method comprises the following steps: generating an environment channel response under the condition of no perception target and a complex coefficient vector of each multipath in a corresponding environment channel cluster according to pre-configured environment parameters; according to the shielding coupling factor, the environment channel response and the complex coefficient vector, generating a background channel response under the condition that the sensing target exists; according to the shielding coupling factor, the forward scattering coupling factor and the environment channel response, generating a target channel response corresponding to the sensing target under the condition that the sensing target exists; and adding the target channel response and the background channel response based on a first preset algorithm to obtain a communication-sensing integrated channel response. The method effectively captures the coupling effect of a sensing target on the environment, achieves the combination of a target channel and a background channel through the shielding of the original cluster diameter and the replacement of the target cluster diameter, makes up for the defect that a conventional superposition model does not consider an environment background or a target environment, and improves the modeling accuracy.

Description

Technical Field

[0001] This application relates to the technical field of integrated communication and sensing in wireless communication technology, and particularly relates to a method for modeling an integrated communication and sensing channel that combines a target channel and a background channel. Background Art

[0002] Currently, Integrated Sensing and Communication (ISAC) has been recognized as a promising technology for enabling ubiquitous sensing and digital twins in the sixth-generation mobile communication (6G) system. The International Telecommunication Union (ITU) and the 3rd Generation Partnership Project (3GPP) have been conducting standardization work on ISAC. Compared with traditional systems with separate devices, ISAC technology integrates these two functions into one system, enabling a communication base station (BS) or user equipment (UE) to sense the surrounding environment. By sharing most software, hardware, and information resources, the ISAC system has great potential in improving spectrum utilization and reducing costs.

[0003] The wireless channel is the medium for radio signal transmission between a transmitter (such as a base station) and a receiver (such as a terminal), and its physical characteristics determine the performance upper limit of the system. In an ISAC system, sensing tasks such as target positioning and tracking focus on excluding environmental clutter from the received signal and accurately extracting the effective information (such as time delay and angle) of the sensing target (ST). Therefore, a realistic ISAC channel model to characterize the impact of the ST in the propagation environment is crucial, as it underpins the performance evaluation and algorithm design of the ISAC system. To accurately model the ISAC channel, ST-related and uncorrelated components are defined as the target and background channels respectively. The next challenge is how to model and combine the target channel and the background channel (Combined Channel). In some existing ISAC channel studies, the background channel is not considered, regarded as system noise, or modeled as an independent environmental statistical cluster and directly added to the target channel component. However, this uncoupled model ignores the impact of the ST on the environment, which can significantly affect the modeling accuracy and lead to incorrect estimation of the ST.

[0004] Therefore, how to combine the target channel and the background channel on the basis of considering the real coupled impact of the ST and the environment to achieve high-accuracy modeling of the ISAC channel has become an urgent problem to be solved in this field. Summary of the Invention

[0005] The technical objective to be achieved by the embodiments of this application is to provide a communication-aware integrated channel modeling method for merging the target channel and the background channel, so as to solve the problem that the current method does not consider the coupling effect between the sensing target and the environment, resulting in the inability to achieve high-accuracy modeling of the ISAC channel.

[0006] To solve the above technical problem, the embodiments of this application provide a communication-aware integrated channel modeling method for merging the target channel and the background channel, including:

[0007] Generate the environmental channel response in the case of no sensing target and the complex coefficient vector of each multipath within the corresponding environmental channel cluster according to the pre-configured environmental parameters;

[0008] Generate the background channel response in the case of having a sensing target according to the occlusion coupling factor, the environmental channel response, and the complex coefficient vector, where the background channel includes multipath components not affected by the sensing target, and the occlusion coupling factor is determined based on the sensing target information in the environmental parameters;

[0009] Generate the target channel response corresponding to the sensing target in the case of having a sensing target according to the occlusion coupling factor, the previously obtained forward scattering coupling factor, and the environmental channel response, where the target channel includes multipath components affected by the sensing target, and the forward scattering coupling factor represents the power difference between the newly generated path and the original path within the occlusion area;

[0010] Based on a first preset algorithm, add the target channel response and the background channel response, and replace the occluded environmental channel cluster / path with the target channel cluster / path to obtain the communication-aware integrated channel response. The first preset algorithm is:

[0011]

[0012] Among them, represents the communication-aware integrated channel response;

[0013] represents the background channel response in the case of having a sensing target;

[0014] represents the target channel response in the case of having a sensing target.

[0015] Specifically, for the above-mentioned modeling method, determining the occlusion coupling factor based on the sensing target information in the environmental parameters includes:

[0016] According to the size information in the sensing target information and the distance between the sensing target and the transmitter or receiver, determine the occlusion area of the sensing target for the signal in the angular domain;

[0017] According to the occluded region, set the values corresponding to the environmental clusters / rays located within the occluded region or the preset occluded diffusion region to zero in the occluded coupling factor, where the preset occluded diffusion region is the region obtained by offsetting the edge of the occluded region outward by a preset distance.

[0018] Further, for the above-mentioned modeling method, determining the occluded coupling factor based on the perception target information in the environmental parameters includes:

[0019] If the required accuracy level of the modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is the preset open scene, then determine that the values in the occluded coupling factor are all 1;

[0020] If the required accuracy level of the modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is not the preset open scene, then determine that the value corresponding to the environmental cluster closest to the perception target in the occluded coupling factor is 0.

[0021] Specifically, for the above-mentioned modeling method, obtaining the target channel response corresponding to the perception target in the presence of the perception target according to the occluded coupling factor, the pre-acquired forward scattering coupling factor, and the environmental channel response includes:

[0022] Generate the non-coupled path response outside the occluded region in the target channel according to the cascade between the transmitter and the perception target and between the perception target and the receiver;

[0023] Obtain the coupled path response within the occluded region corresponding to the target channel according to the second preset algorithm, the occluded coupling factor, the forward scattering coupling factor, and the environmental channel response;

[0024] Sum up the coupled path response and the non-coupled path response based on the third preset algorithm to obtain the target channel response;

[0025] Among them, the second preset algorithm is:

[0026]

[0027] Among them, represents the coupled path response within the occluded region in the target channel;

[0028] represents the inverse transformation vector of the occluded coupling factor, where each element is inverted, represents the dimension of the occluded coupling factor; represents the dimension of the forward scattering coupling factor;

[0029] Indicates the dimension The complex coefficient vector of each multipath within the environmental channel cluster;

[0030] ⊙ is the Hadamard product, representing the element-by-element multiplication of vectors; the third preset algorithm is:

[0031]

[0032] Indicates the target channel response;

[0033] Indicates the non-coupled path response outside the occlusion area;

[0034] Indicates the coupled path response within the occlusion area.

[0035] Preferably, the modeling method as described above further includes:

[0036] Calculating according to the environmental parameters and the Fresnel diffraction formula or a preset occlusion formula to obtain the forward scattering coupling factor. The Fresnel diffraction formula in the dB domain is expressed as:

[0037]

[0038] Wherein, Indicates the value of the forward scattering coupling factor corresponding to the m-th path in cluster n in the presence of a sensed target;

[0039] λ represents the signal wavelength;

[0040] h1, h2, w1, w2 respectively represent the upper, lower, left, and right four edges of the sensed target relative to the line connecting the transmitter and the receiver, and i is the index of one of the edges;

[0041] o i Represents the sign function;

[0042] Respectively represent the edge diffraction intensities corresponding to the respective edges;

[0043] r0, s0 respectively represent the distances from the transmitter and the receiver to the sensed target;

[0044] r, s respectively represent the distances from the transmitter and the receiver to the center of the edge of the sensed target.

[0045] Furthermore, the modeling method as described above further includes:

[0046] If the required accuracy level of the modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is a preset open scene, then determine that the value in the forward scattering coupling factor is 0.

[0047] Another embodiment of the present application further provides a control device, including:

[0048] A first processing module, configured to generate an environmental channel response in a case of an imperceptible target and a complex coefficient vector of each multipath within a corresponding environmental channel cluster according to preconfigured environmental parameters;

[0049] A second processing module, configured to generate a background channel response in a case of a perceptible target according to an occlusion coupling factor, the environmental channel response, and the complex coefficient vector, where the background channel includes multipath components not affected by the perceptible target, and the occlusion coupling factor is determined based on the perceptible target information in the environmental parameters;

[0050] A third processing module, configured to generate a target channel response corresponding to the perceptible target in a case of a perceptible target according to the occlusion coupling factor, a pre-acquired forward scattering coupling factor, and the environmental channel response, where the target channel includes multipath components affected by the perceptible target, and the forward scattering coupling factor represents the power difference between the newly generated path and the original path within the occlusion area;

[0051] A fourth processing module, configured to perform addition on the target channel response and the background channel response based on a first preset algorithm, and replace the occluded environmental channel cluster / path with the target channel cluster / path to obtain a communication and sensing integrated channel response, where the first preset algorithm is:

[0052]

[0053] where, represents the communication and sensing integrated channel response;

[0054] represents the background channel response in a case of a perceptible target;

[0055] represents the target channel response in a case of a perceptible target.

[0056] Another embodiment of the present application further provides a terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, the steps of the above-described modeling method are implemented.

[0057] Another embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-described modeling method are implemented.

[0058] Another embodiment of the present application also provides a computer program product, including computer instructions, which implement the steps of the above-described modeling method when executed by a processor. Compared with the prior art, the communication-aware integrated channel modeling method for merging the target channel and the background channel provided by the embodiments of the present application has at least the following beneficial effects:

[0059] Based on the environmental channel response in the case of an unaware target, the present application considers the occlusion of the sensing target in the case of a aware target, calculates the background channel and the target channel in the case of a aware target and merges them to obtain the final communication-aware integrated channel response, effectively capturing the coupling effect of the sensing target on the environment, realizing the merging of the target and background channels, making up for the deficiencies of traditional models without environmental background or target environment superposition, and improving the accuracy of communication-aware integrated channel modeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 ISAC channel model between transmitter antenna p and receiver antenna q;

[0061] Figure 2 One of the schematic flowcharts of the communication-aware integrated channel modeling method for merging the target channel and the background channel in the embodiments of the present application;

[0062] Figure 3 Occlusion schematic diagram of the sensing target;

[0063] Figure 4 Another schematic flowchart of the communication-aware integrated channel modeling method for merging the target channel and the background channel in the embodiments of the present application;

[0064] Figure 5 Schematic structural diagram of the control device of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0065] To make the technical problems, technical solutions and advantages to be solved by the present application clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present application. Therefore, those skilled in the art should clearly understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of known functions and structures are omitted for clarity and conciseness.

[0066] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in one embodiment" or "in an embodiment" that appears throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0067] In various embodiments of the present application, it should be understood that the magnitude of the serial numbers of the following processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0068] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0069] In the embodiments provided in the present application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0070] When describing the embodiments of the present application, some concepts and related prior arts used in the following description are first explained.

[0071] Taking the ISAC channel under frequency-selective fading as an example. The BS and UE are respectively equipped with [1,..., p,..., P] and [1,..., q,..., Q] antennas. In the downlink propagation scenario, the BS sends signals (i.e., the transmitter), and the UE receives signals (i.e., the receiver). The ISAC channel model between the transmitter antenna p and the receiver antenna q is as Figure 1 shown, the propagation scatterers and the sensing target ST are represented as gray geometric objects. The blue and orange lines respectively represent the paths in the background channel and the target channel. When the ST is located on the BS-UE connection line, the original LoS path that exists in the absence of the ST will be blocked (represented by the blue dotted line). The affected area of the space where this occlusion occurs is defined as the occlusion region (Blockage-Region, BR). At the same time, radio waves can bypass the edge of the ST and reach the UE through scattering or diffraction, forming a target signal path. The concept of forward-scattering (FS) has been widely used in radar research and can be used to describe these coupling paths, which will not be elaborated here.

[0072] Based on the above concepts, the following will combine the accompanying drawings and specific embodiments to elaborate in detail on the communication-aware integrated channel modeling method for merging the target channel and the background channel provided in this application.

[0073] Referring to Figure 2 , an embodiment of the present application provides a communication-aware integrated channel modeling method for merging the target channel and the background channel, including:

[0074] Step S201: Generate the environmental channel response in the case of no sensing target and the complex coefficient vector of each multipath within the corresponding environmental channel cluster according to the pre-configured environmental parameters;

[0075] Step S202: Generate the background channel response in the case of having a sensing target according to the occlusion coupling factor, the environmental channel response, and the complex coefficient vector, where the background channel includes multipath components not affected by the sensing target, and the occlusion coupling factor is determined based on the sensing target information in the environmental parameters;

[0076] Step S203: Generate the target channel response corresponding to the sensing target in the case of having a sensing target according to the occlusion coupling factor, the previously obtained forward scattering coupling factor, and the environmental channel response, where the target channel includes multipath components affected by the sensing target, and the forward scattering coupling factor represents the power difference between the newly generated path and the original path within the occlusion area;

[0077] Step S204: Based on a first preset algorithm, add the target channel response and the background channel response, and replace the occluded environmental channel cluster / rays with the target channel cluster / rays to obtain the communication-aware integrated channel response. The first preset algorithm is:

[0078]

[0079] where represents the communication-aware integrated channel response;

[0080] represents the background channel response in the case of having a sensing target;

[0081] represents the target channel response in the case of having a sensing target.

[0082] In this embodiment, when performing communication-sensing integrated channel modeling, first, in the case of no sensing target (e0), the environmental channel response and the complex coefficient vector of each multipath in the environmental channel cluster are obtained according to pre-configured environmental parameters. The environmental parameters include, but are not limited to, scenarios (such as Urban Macro (Uma), Urban Micro (UMi), Rural Macro (RMa), Indoor Hotspot, Indoor factory (InF)), network layout, antenna parameters, sensing target information (type, size, location, speed, etc.). When generating the environmental channel response and the complex coefficient vector of each multipath in the environmental channel cluster, it is preferably generated according to the 3GPP TR38.901 standard, and the specific calculation formula can be expressed as:

[0083]

[0084] where τ represents the propagation delay, represents the complex coefficient of path m in cluster n in the case of e0, and are the indices of the cluster and path in the environmental channel, enabling this application to be compatible with existing channel modeling standards and effectively reuse the modeling methods and parameters in the 3GPP communication standard.

[0085] As can be seen from the foregoing, in the case of a sensing target, since some paths from transmitters to receivers in the environmental channel will be coupled / blocked due to the position of the sensing target, while other paths are not affected, based on the occlusion situation of the paths by the sensing target, a occlusion coupling factor is obtained by combining the sensing target information and scene information in the environmental parameters, and the blocked situation of the paths in the environmental channel is characterized by the coupling factor.

[0086] Furthermore, according to the occlusion coupling factor, the complex coefficient vector of the environmental channel obtained above, and the first preset algorithm, calculations are performed to obtain the background channel response in the case of a sensing target. The background channel response at this time can be expressed as:

[0087]

[0088] where, represents the background channel response in the case of the existence of ST in the environment (e1);

[0089] represents the channel response corresponding to the coupled / blocked environmental channel path;

[0090] represents the channel response corresponding to the environmental channel path that is not coupled / blocked; represents the occlusion coupling factor vector;

[0091] represents the complex coefficient vector of the environment channel.

[0092] Specifically, in one embodiment, represents the dimension of the complex coefficient vector of each multipath within the environment channel cluster;

[0093] represents the dimension of the occlusion coupling factor, where each element is a Boolean variable for path m in cluster n of the occlusion between transmitter antenna p and receiver antenna q, taking values of 0 or 1. And when applied at the cluster level, and can both be defined as of the dimension, that is, dimension and dimension respectively.

[0094] Furthermore, according to the occlusion coupling factor, the pre-acquired forward scattering coupling factor, and the environment channel response, generate the target channel response corresponding to the multipath components affected by the sensed target in the presence of the sensed target. Among them, the pre-acquired forward scattering coupling factor is used to represent the power difference between the newly generated paths and the original paths in the occlusion area. For example, the values in the forward scattering coupling factor all represent the ratio or difference between the power of the corresponding new multipath component and the power of the original multipath component. By further combining the forward scattering coupling factor to obtain the target channel response, it is beneficial to ensure the accuracy of the obtained target channel response.

[0095] Finally, based on the first preset algorithm, add the background channel response and the target channel response to obtain the final communication and sensing integrated channel response in the presence of the sensed target. The first preset algorithm can be specifically expressed as:

[0096]

[0097] Among them, represents the communication and sensing integrated channel response;

[0098] represents the background channel response in the presence of the sensed target;

[0099] represents the target channel response in the presence of the sensed target.

[0100] In summary, based on the environmental channel response in the case of non-perceived targets, considering the coupling / occlusion of perceived targets in the case of perceived targets, this application calculates the background channel and the target channel in the case of perceived targets and combines them to obtain the final integrated communication and sensing channel response, effectively capturing the coupling effect of perceived targets on the environment, realizing the combination of the target and background channels, making up for the deficiencies of traditional models without environmental background or target environment superposition, and improving the accuracy of integrated communication and sensing channel modeling.

[0101] Specifically, for the modeling method as described above, determining the occlusion coupling factor based on the perceived target information in the environmental parameters includes:

[0102] Determine the occlusion area of the signal by the perceived target in the angular domain according to the size information in the perceived target information and the distance between the perceived target and the transmitter or receiver;

[0103] According to the occlusion area, set the values corresponding to the environmental clusters / rays located in the occlusion area or the occlusion diffusion area to 0 in the occlusion coupling factor, where the occlusion diffusion area is the area after offsetting the edge of the occlusion area outward by a preset distance.

[0104] In the embodiment, an exemplary description of the steps for obtaining the occlusion coupling factor is given. First, according to the size information in the perceived target information and the distance between the perceived target and the transmitter or receiver, determine the occlusion area of the signal by the perceived target in the angular domain. For ease of understanding, refer to Figure 3 , and this occlusion area is, for example, the area between the transmitter antenna p and the receiver antenna q in Figure 3 or the area between the perceived target and the transmitter or receiver as shown. In another embodiment, to more accurately determine this occlusion area, the position information of the perceived target can be further combined for determination.

[0105] After determining this occlusion area, based on the environmental clusters / rays in the state of non-perceived targets, it can be determined that the environmental clusters / rays located in this occlusion area are directly affected by the perceived target. Therefore, in the occlusion coupling factor, set the values corresponding to the environmental clusters / rays located in this occlusion area to 0, and set the values corresponding to other environmental clusters / rays to 1. In another embodiment, to reduce the error caused by other factors such as the thickness of the perceived target, the edge of the occlusion area will also be offset outward by a preset distance to obtain an occlusion diffusion area, and then determine the values in the occlusion coupling factor based on this occlusion diffusion area.

[0106] Furthermore, for the modeling method as described above, determining the occlusion coupling factor based on the perceived target information in the environmental parameters includes:

[0107] If the required accuracy level for modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is a preset open scene, then determine that the values in the occlusion coupling factor are all 1;

[0108] If the required accuracy level for modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is not the preset open scene, then determine that the value corresponding to the environmental cluster closest to the sensing target in the occlusion coupling factor is 0.

[0109] In a specific embodiment, for the convenience of calculation, etc., the acquisition of the occlusion coupling factor is also simplified based on the required accuracy level for modeling and the scene information in the environmental parameters. For example: when the required accuracy level for modeling is lower than the preset accuracy level and the scene information is a preset open scene (such as an Unmanned Aerial Vehicle (UAV)-UMa scene, etc.), it can be determined that the probability of the path being occluded is relatively low. At this time, it can be considered that the sensing target is not occluded, and then determine that the values in the occlusion coupling factor are all 1; or, when the required accuracy level for modeling is lower than the preset accuracy level, but the scene information is not the above-mentioned preset open scene, but a more complex scene such as indoor (such as Human-Indoor) or outdoor (such as Vehicle-Outdoor), the cluster closest to the sensing target can be directly regarded as the occluded cluster, and the value corresponding to it in the occlusion coupling factor is set to 0. It can also be understood that this cluster is deleted in the background channel.

[0110] It should be noted that the above is only a simple example of simplifying the acquisition of the occlusion coupling factor, and other methods used by those skilled in the art to simplify should also fall within the protection scope of this application.

[0111] It should be noted that when the required accuracy level for modeling is higher than the preset accuracy level, the occlusion coupling factor is determined according to the non-simplified method in the previous embodiment.

[0112] See Figure 4 , specifically, for the above-mentioned modeling method, the obtaining of the target channel response corresponding to the sensing target in the case of having a sensing target according to the occlusion coupling factor, the pre-obtained forward scattering coupling factor, and the environmental channel response includes:

[0113] Step S401, generate a non-coupled path response outside the occlusion area in the target channel according to the cascade between the transmitter and the sensing target and between the sensing target and the receiver;

[0114] Step S402, obtain a coupled path response in the occlusion area corresponding to the target channel according to the second preset algorithm, the occlusion coupling factor, the forward scattering coupling factor, and the environmental channel response;

[0115] Step S403: Sum up the coupled path response and the uncoupled path response based on a third preset algorithm to obtain the target channel response;

[0116] Among them, the second preset algorithm is:

[0117]

[0118] Among them, represents the coupled path response within the occlusion area in the target channel;

[0119] represents the inverse transform vector of the occlusion coupling factor, where each element is inverted, represents the dimension of the occlusion coupling factor; represents the dimension of the forward scattering coupling factor;

[0120] represents the complex coefficient vector of each multipath within the environmental channel cluster with dimension ;

[0121] ⊙ is the Hadamard product, indicating the element-by-element multiplication of vectors;

[0122] The third preset algorithm is:

[0123]

[0124] represents the target channel response;

[0125] represents the uncoupled path response outside the occlusion area;

[0126] represents the coupled path response within the occlusion area.

[0127] For the convenience of those skilled in the art to understand, in this embodiment, an example of the steps to obtain the target channel response is given. Among them, from the foregoing analysis, in the case of a sensing target, within the occlusion area of the sensing target, the signal between the transmitter and the receiver can generate new multipaths through scattering or diffraction and replace the original multipaths in the environment. Therefore, the target channel response can be divided into the channel responses inside and outside the occlusion area, that is, the uncoupled path response outside the occlusion area and the coupled path response within the occlusion area At this time, it is necessary to separately obtain the two path responses and sum them up based on the third preset algorithm to obtain the required target channel response The formula of the third preset algorithm can be expressed as:

[0128] Therefore, when obtaining the target channel response, first, according to the cascades between the transmitter and the sensing target and between the sensing target and the receiver, the non-coupled path response outside the occlusion area in the target channel is generated. Specifically, it can be expressed as:

[0129]

[0130] where l represents the index label of the sensing target and respectively represent the non-coupled path responses of the links from the sensing target to the receiver antenna q and from the transmitter antenna p to the sensing target. * represents the convolution operation, and σ l (Γ out , Γ in ) represents the Radar Cross Section (RCS) value of the ST, which characterizes the path power fading caused by the ST. The RCS value is determined by the outgoing angle and the incident angle related to the ST.

[0131] Since the coupled path response is related to the original environmental path with similar time delay and angle, in order to accurately simulate the power effect of the sensing target on the environment, here the second preset algorithm is used in combination with the forward scattering coupling factor for calculation. At this time, the second preset algorithm used is expressed as:

[0132]

[0133] where is the inverse transform vector of the occlusion coupling factor, and each element is inverted. Therefore, only when there is a value of 0 in the occlusion coupling factor, the corresponding value of the forward scattering coupling factor is valid;

[0134] represents the forward scattering coupling factor of dimension . It should be noted that when applied at the cluster level, this parameter can be defined as the dimension of . In an open environment (such as the aforementioned preset open scene), the forward scattering coupling factor can also be interpreted as the RCS value of the ST at a specific angle (i.e., when the included angle between the incident and outgoing angles is close to 180°).

[0135] It should be noted that the occlusion area in this embodiment is the above-mentioned occlusion area or occlusion diffusion area.

[0136] Preferably, the above-mentioned modeling method further includes:

[0137] Calculate according to the environmental parameters and the Fresnel diffraction formula or a preset occlusion formula to obtain the forward scattering coupling factor. The Fresnel diffraction formula in the dB domain is expressed as:

[0138]

[0139] Wherein, Represents the value of the forward scattering coupling factor corresponding to the path m in cluster n in the case of a perceived target;

[0140] λ represents the signal wavelength;

[0141] h1, h2, w1, w2 respectively represent the upper, lower, left, and right four edges of the perceived target relative to the line connecting the transmitter and the receiver, and i is the index of one of the edges;

[0142] o i Represents the sign function;

[0143] Respectively represent the edge diffraction intensities corresponding to the respective edges;

[0144] r0 and s0 respectively represent the distances from the transmitter and the receiver to the perceived target;

[0145] r and s respectively represent the distances from the transmitter and the receiver to the center of the edge of the perceived target.

[0146] In this embodiment, an example of how to obtain the forward scattering coupling factor is given. For example: It can be calculated according to the environmental parameters and the Fresnel diffraction formula or a preset occlusion formula, where the preset occlusion formula is preferably the simplified occlusion formula in 3GPP, and details are not elaborated here. When determining based on the Fresnel diffraction formula in the dB domain, this embodiment takes the simplified 4-edge diffraction (Knife-Edge Diffraction, KED) model as an example. Since only the influence of the four edge center points of the obstacle on the propagation is considered in this simplified model, therefore, in this simplified model, the diffraction attenuation (i.e., the forward scattering coupling factor) of path m in cluster n is expressed as:

[0147]

[0148] Wherein, Represents the value of the forward scattering coupling factor corresponding to the path m in cluster n in the case of a perceived target;

[0149] λ represents the signal wavelength;

[0150] h1, h2, w1, w2 respectively represent the upper, lower, left, and right four edges of the perceived target relative to the line connecting the transmitter and the receiver, and i is the index of one of the edges;

[0151] o iDenoted as a sign function;

[0152] They respectively represent the edge diffraction intensities of the corresponding edges. For a single edge, the result can be further approximated by the arctangent function to avoid complex numerical integration;

[0153] r0 and s0 respectively represent the distances from the transmitter and the receiver to the sensed target;

[0154] r and s respectively represent the distances from the transmitter and the receiver to the center of the edge of the sensed target.

[0155] Among them, for the paths that do not intersect with the sensed target in the side view,

[0156] For the paths that do not intersect with the sensed target in the top view,

[0157] Furthermore, the above-mentioned modeling method further includes:

[0158] If the required accuracy level of the modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is the preset open scene, then determine that the value in the forward scattering coupling factor is 0.

[0159] In this embodiment, for the convenience of calculation, etc., the acquisition of the forward scattering coupling factor will also be simplified based on the required accuracy level of the modeling and the scene information in the environmental parameters. For example: when the required accuracy level of the modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is the above-mentioned preset open scene, at this time the probability of forward scattering is relatively low, so the channel response at this time is equivalent to the non-coupled path response only outside the occlusion area. Therefore, determine that the value in the forward scattering coupling factor is 0. That is to say, the target channel response can be determined only by obtaining the non-coupled path response.

[0160] It should be noted that the above is only a simple example of simplifying the acquisition of the forward scattering coupling factor, and other ways adopted by those skilled in the art to simplify should also fall within the protection scope of this application.

[0161] It should be noted that when the required accuracy level of the modeling is higher than the preset accuracy level, the forward scattering coupling factor is determined according to the unsimplified method in the previous embodiment.

[0162] For the convenience of those skilled in the art to understand, the following gives examples of the specific calculation formulas for the environmental channel response, the communication and sensing integrated channel response, and the non-coupled path response.

[0163]

[0164] Among them, λ0 represents the wavelength of the carrier.

[0165] represents the amplitude of path m in cluster n between receiver antenna q and transmitter antenna p in the case of e0. Similarly, and respectively represent the amplitudes of path m in cluster n of ST to receiver q antenna and transmitter antenna p to ST link in the state of e1.

[0166] and respectively represent the azimuth angle of departure (AOD) and azimuth angle of arrival (AOA) of path m in cluster n in the states of e0 and e1.

[0167] and respectively represent the zenith angle of departure (ZOD) and zenith angle of arrival (ZOA) of path m in cluster n in the states of e0 and e1.

[0168] F rx,q and F tx,q are the antenna radiation patterns of receiver antenna q and transmitter antenna p.

[0169] and respectively represent the random initial phases of path m in cluster n in the states of e0 and e1.

[0170] and are the spherical unit vectors of path m in cluster n on the sides of receiver antenna q and transmitter antenna p in the states of e0 and e1 respectively.

[0171] and are the position vectors of receiver antenna q and transmitter antenna p.

[0172] and respectively represent the Doppler frequency shifts of path m in cluster n in the states of e0 and e1.

[0173] represents the time delay of path m in cluster n in the state of e0, and respectively represent the time delays of path m in cluster n of ST to receiver antenna q and transmitter antenna p to ST link in the state of e1.

[0174] Non - coupled path response The cluster index of represents the corresponding path index.

[0175] See Figure 5 , Another embodiment of the present application further provides a control device, including:

[0176] The first processing module is used to generate the environmental channel response in the case of an imperceptible target and the complex coefficient vector of each multipath within the corresponding environmental channel cluster according to pre - configured environmental parameters;

[0177] The second processing module is used to generate the background channel response in the case of a perceptible target according to the occlusion coupling factor, the environmental channel response and the complex coefficient vector, where the background channel includes multipath components not affected by the perceptible target, and the occlusion coupling factor is determined based on the perceptible target information in the environmental parameters;

[0178] The third processing module is used to generate the target channel response corresponding to the perceptible target in the case of a perceptible target according to the occlusion coupling factor, the pre - acquired forward - scattering coupling factor and the environmental channel response, where the target channel includes multipath components affected by the perceptible target, and the forward - scattering coupling factor represents the power difference between the newly generated path and the original path in the occlusion area;

[0179] The fourth processing module is used to sum the target channel response and the background channel response based on a first preset algorithm to obtain the communication - perception integrated channel response, and the first preset algorithm is:

[0180]

[0181] where represents the communication - perception integrated channel response;

[0182] represents the background channel response in the case of a perceptible target;

[0183] represents the target channel response in the case of a perceptible target.

[0184] Specifically, the device as described above further includes:

[0185] The fifth processing module is used to determine the occlusion area of the perceptible target on the signal in the angular domain according to the size information in the perceptible target information and the distance between the perceptible target and the transmitter or receiver;

[0186] The sixth processing module is used to set the values corresponding to the environmental clusters / rays located in the occlusion area or the occlusion diffusion area to 0 in the occlusion coupling factor according to the occlusion area, where the occlusion diffusion area is the area obtained by offsetting the edge of the occlusion area outward by a preset distance.

[0187] Further, the device as described above further includes:

[0188] The seventh processing module is used to determine that the values in the occlusion coupling factor are all 1 if the required accuracy level for modeling is lower than or equal to the preset accuracy level and the scene information in the environmental parameters is the preset open scene;

[0189] The seventh processing module is used to determine that the value corresponding to the environmental cluster closest to the sensing target in the occlusion coupling factor is 0 if the required accuracy level for modeling is lower than or equal to the preset accuracy level and the scene information in the environmental parameters is not the preset open scene.

[0190] Specifically, for the device as described above, the third processing module includes:

[0191] The first processing unit is used to generate the non-coupled path response outside the occlusion area in the target channel according to the cascading between the transmitter and the sensing target and between the sensing target and the receiver;

[0192] The second processing unit is used to obtain the coupled path response located in the occlusion area corresponding to the target channel according to the second preset algorithm, the occlusion coupling factor, the forward scattering coupling factor, and the environmental channel response;

[0193] The third processing unit is used to add the coupled path response and the non-coupled path response based on the third preset algorithm to obtain the target channel response;

[0194] Among them, the second preset algorithm is:

[0195]

[0196] Among them, represents the coupled path response located in the occlusion area in the target channel;

[0197] represents the inverse transformation vector of the occlusion coupling factor, where each element is inverted, represents the dimension of the occlusion coupling factor; represents the dimension of the forward scattering coupling factor;

[0198] represents the dimension The complex coefficient vector of each multipath within the environmental channel cluster;

[0199] ⊙ represents the Hadamard product, indicating the element-wise multiplication of vectors;

[0200] The third preset algorithm is as follows:

[0201]

[0202] Represents the target channel response;

[0203] Represents the non-coupled path response outside the occlusion area;

[0204] Represents the coupled path response within the occlusion area.

[0205] Preferably, the device as described above further includes:

[0206] An eighth processing module, configured to calculate the forward scattering coupling factor according to the environmental parameters and the Fresnel diffraction formula or a preset occlusion formula. The Fresnel diffraction formula in the dB domain is expressed as:

[0207]

[0208] Wherein, Represents the value of the forward scattering coupling factor corresponding to the m-th path in cluster n in the presence of a sensed target;

[0209] λ represents the signal wavelength;

[0210] h1, h2, w1, w2 respectively represent the upper, lower, left, and right four edges of the sensed target relative to the line connecting the transmitter and the receiver, and i is the index of one of the edges;

[0211] Respectively represent the edge diffraction intensities corresponding to the edges;

[0212] r0, s0 respectively represent the distances from the transmitter and the receiver to the sensed target;

[0213] r, s respectively represent the distances from the transmitter and the receiver to the center of the edge of the sensed target.

[0214] Furthermore, the device as described above further includes:

[0215] A ninth processing module, configured to determine that the value in the forward scattering coupling factor is 0 if the required accuracy level of the modeling is lower than or equal to the preset accuracy level and the scene information in the environmental parameters is a preset empty scene.

[0216] The embodiment of the control device of the present application is a device corresponding to the embodiment of the above-mentioned communication perception integrated channel modeling method for merging the target channel and the background channel. All the implementation means in the above method embodiment are applicable to the embodiment of this device and can achieve the same technical effect. The above-mentioned control device provided by the embodiment of the present application can implement all the method steps implemented by the above method embodiment and can achieve the same technical effect. The same parts and beneficial effects as those in the method embodiment will not be specifically described herein again.

[0217] Another embodiment of the present application further provides a receiver, including a processor, a memory, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the above-mentioned modeling method and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0218] Another embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the above-mentioned modeling method and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0219] Another embodiment of the present application further provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, they implement the steps of the above-mentioned modeling method and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0220] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not itself indicate the relationship between the various embodiments and / or arrangements discussed.

[0221] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion.

[0222] The above is the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A communication perception integrated channel modeling method for merging a target channel and a background channel, characterized in that Including: Generating an environmental channel response in a non-perceived target scenario and a complex coefficient vector for each multipath within the corresponding environmental channel cluster according to pre-configured environmental parameters; Generating a background channel response in a perceived target scenario according to an occlusion coupling factor, the environmental channel response, and the complex coefficient vector, where the background channel includes multipath components not affected by the perceived target, and the occlusion coupling factor is determined based on the perceived target information in the environmental parameters; Generating a target channel response corresponding to the perceived target in a perceived target scenario according to the occlusion coupling factor, a pre-acquired forward scattering coupling factor, and the environmental channel response, where the target channel includes multipath components affected by the perceived target, and the forward scattering coupling factor represents the power difference between the newly generated path and the original path within the occlusion area; Adding the target channel response and the background channel response based on a first preset algorithm, and replacing the occluded environmental channel cluster / path with the target channel cluster / path to obtain a communication and sensing integrated channel response, where the first preset algorithm is: Among them, represents the communication and sensing integrated channel response; representing the background channel response in the presence of a sensed target; Indicates the target channel response in the presence of a sensed target.

2. The modeling method according to claim 1, characterized in that Determining the occlusion coupling factor based on the perceived target information in the environmental parameters includes: Determining the occlusion area of the perceived target on the signal in the angular domain according to the size information in the perceived target information and the distance between the perceived target and the transmitter or receiver; According to the occlusion area, setting the values corresponding to the environmental cluster / path located within the occlusion area or a preset occlusion diffusion area to zero in the occlusion coupling factor, where the preset occlusion diffusion area is the area obtained by offsetting the edge of the occlusion area outward by a preset distance.

3. The modeling method according to claim 1 or 2, characterized in that Determining the occlusion coupling factor based on the perceived target information in the environmental parameters, includes: If the required accuracy level for modeling is lower than or equal to the preset accuracy level, and the scenario information in the environmental parameters is a preset open scenario, then determining that all values in the occlusion coupling factor are 1; If the required accuracy level for modeling is lower than or equal to the preset accuracy level, and the scenario information in the environmental parameters is not the preset open scenario, then determining that the value corresponding to the environmental cluster closest to the perceived target in the occlusion coupling factor is 0.

4. The modeling method according to claim 2, wherein The obtaining the target channel response corresponding to the perceived target in a perceived target scenario according to the occlusion coupling factor, a pre-acquired forward scattering coupling factor, and the environmental channel response, includes: Generating a non-coupled path response outside the occlusion area in the target channel according to the cascade between the transmitter and the perceived target and between the perceived target and the receiver; Obtaining a coupled path response within the occlusion area corresponding to the target channel according to a second preset algorithm, the occlusion coupling factor, the forward scattering coupling factor, and the environmental channel response; Adding the coupled path response and the non-coupled path response based on a third preset algorithm to obtain the target channel response; Wherein, the second preset algorithm is: Among them, represents the coupling path response in the target channel located within the occlusion area; Represents the inverse transform vector of the occlusion coupling factor, where each element is inverted, Represents the dimension of the occlusion coupling factor; Represents the dimension of the forward scattering coupling factor; Indicates the dimension of the complex coefficient vector of each multipath within the environmental channel cluster; ⊙ represents the Hadamard product, indicating the element-wise multiplication of vectors; The third preset algorithm is: Indicates the target channel response; Indicates the non-coupling path response outside the occluded area; Indicates the coupling path response within the occluded area.

5. The modeling method according to claim 4, wherein Also including: The forward scattering coupling factor is obtained by calculating according to the environmental parameters and the Fresnel diffraction formula or the preset shielding formula. The Fresnel diffraction formula in the dB domain is expressed as: Among them, represents the value of the forward scattering coupling factor corresponding to the m-th radius in cluster n in the case of a sensed target; λ represents the signal wavelength; h1, h2, w1, w2 represent the four edges of the sensing target relative to the upper, lower, left, and right edges of the line connecting the transmitter and the receiver, respectively, and i represents the index of one of the edges; o i is expressed as a sign function; respectively represent the edge diffraction intensities corresponding to the respective edges; r0, s0 represent the distances from the transmitter and receiver to the perceived target, respectively; r, s represent the distances from the transmitter and receiver to the center of the edge of the sensing target, respectively.

6. The modeling method according to claim 4 or 5, characterized in that, Also includes: If the accuracy level required for modeling is lower than or equal to the preset accuracy level, and the scene information in the environmental parameters is a preset open scene, the value in the forward scattering coupling factor is determined to be 0.

7. A control device, characterized in that, include: A first processing module is used to generate an environmental channel response without a perceptual target and a complex coefficient vector of each multipath in a corresponding environmental channel cluster according to preconfigured environmental parameters; A second processing module is configured to generate a background channel response in the presence of a perception target according to an occlusion coupling factor, the environmental channel response and a complex coefficient vector, wherein the background channel includes a multipath component that is not affected by the perception target, and the occlusion coupling factor is determined based on the perception target information in the environmental parameters; A third processing module is used to generate a target channel response corresponding to the perception target in the case where there is a perception target according to the occlusion coupling factor, the pre-acquired forward scatter coupling factor and the environmental channel response, wherein the target channel includes a multipath component affected by the perception target, and the forward scatter coupling factor represents a power difference between a newly generated path and an original path in the occlusion area; The fourth processing module is used to add the target channel response and the background channel response based on a first preset algorithm, replace the blocked environmental channel cluster / path with the target channel cluster / path, and obtain a communication perception integrated channel response, wherein the first preset algorithm is: Among them, represents the communication-sensing integrated channel response; representing the background channel response in the presence of a sensed target; Indicates the target channel response in the presence of a sensed target.

8. A terminal, characterized in that, The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the modeling method according to any one of claims 1 to 6 when executed by the processor.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the modeling method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that, The method comprises computer instructions, which, when executed by a processor, implement the steps of the modeling method according to any one of claims 1 to 6.

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