Phased array beam interference suppression method and device, equipment and storage medium

Abstract

The invention relates to a phased array beam interference suppression method and device, equipment and a storage medium. The method comprises the following steps: according to an agreed configuration mode, dividing a beam switching instruction into a single-beam switching instruction and a multi-beam switching instruction after the phased array receives the beam switching instruction; and calculating the total interference of the remaining beams of the target beam on the target beam. And comparing the total interference with the minimum signal-to-noise ratio threshold of the target beam. And if the minimum signal-to-noise ratio threshold is not satisfied, performing interference suppression on the interference source to reconfigure the target beam. By adopting the method, the anti-interference capability of same-frequency multi-beam communication can be improved.

Description

Technical Field

[0001] This invention relates to the field of multi-beam interference suppression technology, and in particular to a phased array beam interference suppression method, apparatus, device, and storage medium. Background Technology

[0002] In satellite communication, to improve service range and communication capacity, multi-beam phased array antennas are typically chosen. Each beam covers a certain area, and multiple beams cover the entire sub-satellite region. To avoid coverage holes, different beams will overlap in some areas. The scheduling of different beams is performed according to the actual situation of the terminal. Different beams can be regarded as different cells in mobile communication. The actual communication cell of the terminal in the beam overlap area is determined by the cell boundary scheduling algorithm.

[0003] For an antenna beam, its main operating area is the region covered by the 3dB bandwidth of the main lobe. However, signals can still be received in other areas of the main lobe and the high-energy first sidelobe. In the case of multiple overlapping and adjacent beams, parts of the main lobe and the first sidelobe of different beams may fall within the main lobe range of another beam. This can cause signals belonging to the first beam to enter the second beam, resulting in a decrease in the signal-to-noise ratio (SNR) of the second beam. Moreover, this effect is mutual; the SNR of both the first and second beams will decrease.

[0004] Because the beam shape becomes elliptical at large angles, the mutual interference between different beams will be aggravated. For typical cellular beam coverage, the interference between different beams can reach more than 50% of the main beam, resulting in significant interference in multi-beam communication on the same frequency, which will affect the signal-to-noise ratio. Summary of the Invention

[0005] Therefore, it is necessary to provide a phased array beam interference suppression method, device, equipment, and storage medium that can improve the anti-interference capability of multi-beam communication at the same frequency, in response to the above-mentioned technical problems.

[0006] A method for suppressing beam interference in a phased array, the method comprising:

[0007] According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into single beam switching command and multi-beam switching command.

[0008] Calculate the total interference of the target beam from the residual beam of the target beam.

[0009] Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0010] If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

[0011] A phased array beam interference suppression device, the device comprising: The command switching module is used to divide the beam switching command into single-beam switching command and multi-beam switching command after receiving the beam switching command, according to the agreed configuration method.

[0012] The total interference calculation module is used to calculate the total interference of the target beam from the residual beam of the target beam.

[0013] The target threshold acquisition module is used to compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0014] The interference suppression module is used to perform interference suppression on the interference source if the minimum signal-to-noise ratio threshold is not met, so as to reconfigure the target beam.

[0015] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program performing the following steps: According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into single beam switching command and multi-beam switching command.

[0016] Calculate the total interference of the target beam from the residual beam of the target beam.

[0017] Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0018] If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

[0019] A computer-readable storage medium having a computer program stored thereon, the computer program performing the following steps when executed by a processor: According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into single beam switching command and multi-beam switching command.

[0020] Calculate the total interference of the target beam from the residual beam of the target beam.

[0021] Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0022] If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

[0023] The aforementioned phased array beam interference suppression method, apparatus, device, and storage medium firstly classify beam switching commands into single-beam and multi-beam switching types, achieving precise focusing on interference processing scenarios and avoiding the use of a uniform processing mode for all switching scenarios. Secondly, based on the array synthesis algorithm, the sidelobe signal strengths of the target beam at the direction of each residual beam are calculated and arithmetically summed to obtain the total interference quantization value, providing an accurate and reliable basis for signal-to-noise ratio threshold comparison and overcoming the limitation of coarse interference estimation in existing technologies. Finally, a hierarchical adaptive interference suppression strategy is constructed: when the number of array elements is sufficient and the system degrees of freedom are abundant, the zero-forcing or minimum variance distortionless response algorithm is used to fully suppress all interference sources; when resources are limited, the interference sources are arranged in descending order of interference intensity and the top preset number of main interference sources are suppressed first. By organically integrating the three aspects of beam switching scenario classification, precise interference quantification, and resource-based suppression strategies, the above-mentioned collaborative mechanism is formed. This mechanism effectively eliminates the core causes of multi-beam interference on the same frequency, balances computational and degree-of-freedom resource overhead while ensuring the signal-to-noise ratio of the target beam communication, and significantly improves the anti-interference capability of the multi-beam communication system on the same frequency. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating a phased array beam interference suppression method in one embodiment; Figure 2 This is a flowchart illustrating a phased array beam interference suppression step in one embodiment; Figure 3 This is a structural block diagram of a phased array beam interference suppression device in one embodiment; Figure 4 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] In one embodiment, such as Figure 1 As shown, a phased array beam interference suppression method is provided, including the following steps: Step 102: According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into single beam switching command and multi-beam switching command.

[0027] Step 104: Calculate the total interference of the target beam from the residual beam of the target beam.

[0028] Step 106: Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0029] Step 108: If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

[0030] The aforementioned phased array beam interference suppression method first divides beam switching commands into single-beam and multi-beam switching types, achieving precise focusing on interference processing scenarios and avoiding the use of a uniform processing mode for all switching scenarios. Second, based on the array synthesis algorithm, the sidelobe signal strengths of the target beam at the direction of each coarse beam are calculated and arithmetically summed to obtain the total interference quantization value, providing an accurate and reliable basis for signal-to-noise ratio threshold comparison and overcoming the limitation of coarse interference estimation in existing technologies. Finally, a hierarchical and adaptive interference suppression strategy is constructed: when the number of array elements is sufficient and the system degrees of freedom are abundant, the zero-forcing or minimum variance distortionless response algorithm is used to fully suppress all interference sources; when resources are limited, the interference sources are arranged in descending order of interference intensity and the top preset number of main interference sources are suppressed first. By organically integrating the three aspects of beam switching scenario classification, precise interference quantification, and resource-based suppression strategies, the above-mentioned collaborative mechanism is formed. This mechanism effectively eliminates the core causes of multi-beam interference on the same frequency, balances computational and degree-of-freedom resource overhead while ensuring the signal-to-noise ratio of the target beam communication, and significantly improves the anti-interference capability of the multi-beam communication system on the same frequency.

[0031] In one embodiment, an array synthesis algorithm is used to calculate the sidelobe signals at the points where the target beam points to the remaining beams of the target beam as single-beam interference. The signal strengths of each single-beam interference are arithmetically summed to obtain the total interference. ; in, For beam n, the total interference from other beams This refers to the interference of beam m on beam n.

[0032] In one embodiment, the minimum signal-to-noise ratio (SNR) threshold for the target beam is determined based on the signal modulation scheme used by the target beam, specifying the minimum SNR threshold that must be guaranteed for the current beam communication. .

[0033] In one embodiment, if the minimum signal-to-noise ratio threshold is not met, when the number of array elements is sufficient and the system has sufficient degrees of freedom, the influence of the nth beam on the remaining N-1 beams is calculated in a polling manner. The remaining N-1 beams are used as interference source inputs, and the zero-forcing algorithm or the minimum variance distortionless response algorithm is used to suppress all interference sources in order to reconfigure the target beam.

[0034] In one embodiment, when performing multi-beam switching, for the M beams that need to be switched, the interference effect of the m-th beam on the NM beams that have already been configured is calculated in a polling manner. If adding the m-th beam causes the interference of the n-th beam that has already been configured to exceed the minimum signal-to-noise ratio threshold, then the m-th beam needs to perform beam suppression on the angle where the n-th beam is located in order to reconfigure the target beam.

[0035] In one embodiment, if the phased array has limited degrees of freedom and the m-th beam cannot meet all interference suppression requirements, the interference power of all K beams affected by the m-th beam and whose interference exceeds the threshold is sorted in descending order, and the interference suppression requirements of the first L beams are satisfied first, where L is determined by the degrees of freedom of the phased array.

[0036] In one embodiment, at the current moment, the power of the remaining beams within the beam is measured by the coherence of the signals of the remaining beams within the beam; at the next moment, an anti-phase interference signal is constructed using the power of the remaining beams measured at the current moment, and the anti-phase interference signal is superimposed on the received signal to cancel the interference and reconfigure the target beam.

[0037] Specifically, signal interference between multiple beams due to beam overlap or sidelobe overlap can be described by the following formula: ; in, It is the signal output by beam i. It is the signal amplitude of beam i. It is the signal of beam i. For beam i, The value is 1, which represents the original amplitude of the signal. It refers to the signals from all beams except beam i. It is the interference power of the other beams in beam i.

[0038] At time t, the power of the remaining beams within beam i is measured by assessing the coherence of their signals. At time t+1, the signal of beam i is constructed using the power of the remaining beams measured at time t. ; in, It is the signal of beam i at time t+1. It is the effective signal of beam i at time t+1. It is the interference power of beam j signal on beam i at time t. This is the effective signal of beam j at time t+1. Since the signals are 180° out of phase, interference can be completely suppressed after signal superposition.

[0039] In one embodiment, such as Figure 2 As shown, a phased array beam interference suppression step is provided, the specific content of which is as follows: The entire phased array antenna has N beams. After receiving a single beam switching command, it polls and calculates the impact of the nth beam on the other N-1 beams. That is, based on the array synthesis algorithm, it calculates the interference of beam A at the direction pointed to by beam B (where beam A is the beam to be estimated, and the signal that the sidelobe of beam A can receive at the direction pointed to by beam B is the interference signal). The signal that the nth beam can receive at the direction pointed to by the other N-1 beams is added as the interference signal strength (i.e., the sum of the antenna gain of the nth beam at the direction pointed to by the other N-1 beams). Since the signals between different beams are uncorrelated, the signal strength can be directly calculated by arithmetic addition. ; in This indicates that beam n is affected by the total noise interference from other beams. This indicates the interference of beam m on beam n.

[0040] Based on the signal modulation method used by beam n, the minimum signal-to-noise ratio requirement that beam n needs to guarantee can be determined. When the minimum signal-to-noise ratio requirement for communication cannot be met, interference suppression is necessary. When the number of array elements is large enough, the system has enough degrees of freedom to suppress interference from N-1 beams (interference sources) using typical ZF (zero-forcing) and MVDR (minimum variance distortionless response) algorithms. The beams of the N-1 beams are used as the input of the interference source (the detailed implementation of the interference suppression algorithm is irrelevant to this case).

[0041] For resource-constrained scenarios (such as computational resources or control degrees of freedom), interference sources can be partially suppressed. When determining interference, an interference list is constructed, recording the interference of the k-th beam to beam n. The system has a maximum of N-1 interference sources, and the number of interference sources that can be suppressed is M. These sources are sorted in descending order of their interference severity, and the M beams with the highest interference severity are selected as the targets for suppression.

[0042] It should be understood that, although Figures 1-2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 1-2At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0043] In one embodiment, such as Figure 3 As shown, a phased array beam interference suppression device is provided, comprising: a command switching module 302, a total interference calculation module 304, a target threshold acquisition module 306, and an interference suppression module 308, wherein: The instruction switching module 302 is used to divide the beam switching instruction into a single beam switching instruction and a multi-beam switching instruction after receiving the beam switching instruction, according to the agreed configuration method.

[0044] The total interference calculation module 304 is used to calculate the total interference of the target beam from the residual beam of the target beam.

[0045] The target threshold acquisition module 306 is used to compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0046] Interference suppression module 308 is used to perform interference suppression on the interference source to reconfigure the target beam if the minimum signal-to-noise ratio threshold is not met.

[0047] In one embodiment, the interference suppression module 308 is further configured to, if the minimum signal-to-noise ratio threshold is not met, when the number of array elements is sufficient and the system degrees of freedom are sufficient, poll and calculate the influence of the nth beam on the remaining N-1 beams, take the remaining N-1 beams as interference source inputs, and use the zero-forcing algorithm or the minimum variance distortionless response algorithm to perform full interference source suppression in order to reconfigure the target beam.

[0048] For specific limitations regarding a phased array beam interference suppression device, please refer to the limitations of a phased array beam interference suppression method described above, which will not be repeated here. Each module in the aforementioned phased array beam interference suppression device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in a computer device, or stored in software in the memory of a computer device, so that the processor can call and execute the operations corresponding to each module.

[0049] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 4As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a phased array beam interference suppression method. The display screen can be a liquid crystal display (LCD) or an e-ink display. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0050] Those skilled in the art will understand that Figures 3-4 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the computer device to which the present invention is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0051] In one embodiment, a computer device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the following steps: According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into single beam switching command and multi-beam switching command.

[0052] Calculate the total interference of the target beam from the residual beam of the target beam.

[0053] Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0054] If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

[0055] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor: According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into single beam switching command and multi-beam switching command.

[0056] Calculate the total interference of the target beam from the residual beam of the target beam.

[0057] Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam.

[0058] If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

[0059] In one embodiment, when the computer program is executed by the processor, it further implements the following steps: when performing multi-beam switching, for the M beams that need to be switched, the interference effect of the m-th beam on the NM beams that have been configured is calculated in a polling manner. If adding the m-th beam causes the interference of the n-th beam that has been configured to exceed the minimum signal-to-noise ratio threshold, then the m-th beam needs to perform beam suppression on the angle where the n-th beam is located in order to reconfigure the target beam.

[0060] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink, DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for suppressing beam interference in a phased array, characterized in that, The method includes: According to the agreed configuration method, after receiving the beam switching command, the phased array divides the beam switching command into a single beam switching command and a multi-beam switching command. Calculate the total interference of the target beam from the residual beam of the target beam; Compare the total interference with the minimum signal-to-noise ratio threshold of the target beam; If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam.

2. The method according to claim 1, characterized in that, Calculate the total interference of the target beam from the residual beam of the target beam, including: The sidelobe signals at the points where the target beam points are located are calculated using an array synthesis algorithm and treated as single-beam interference. The signal strengths of each single-beam interference are then arithmetically summed to obtain the total interference. ； in, For beam n, the total interference from other beams This refers to the interference of beam m on beam n.

3. The method according to claim 1, characterized in that, The minimum signal-to-noise ratio (SNR) threshold for the target beam is determined based on the signal modulation method used by the target beam, specifying the minimum SNR threshold that must be guaranteed for the current beam communication. .

4. The method according to claim 3, characterized in that, If the minimum signal-to-noise ratio threshold is not met, interference suppression is performed on the interference source to reconfigure the target beam, including: If the minimum signal-to-noise ratio threshold is not met, when the number of array elements is sufficient and the system has enough degrees of freedom, the influence of the nth beam on the other N-1 beams is calculated in a polling manner. The other N-1 beams are used as interference source inputs, and the zero-forcing algorithm or the minimum variance distortionless response algorithm is used to suppress all interference sources in order to reconfigure the target beam.

5. The method according to claim 1, characterized in that, When performing multi-beam switching, for the M beams that need to be switched, the interference effect of the m-th beam on the NM beams that have already been configured is calculated in a polling manner. If adding the m-th beam causes the interference of the n-th beam that has already been configured to exceed the minimum signal-to-noise ratio threshold, then the m-th beam needs to perform beam suppression at the angle where the n-th beam is located in order to reconfigure the target beam.

6. The method according to claim 5, characterized in that, Before the step of performing interference suppression on the interference source to reconfigure the target beam if the minimum signal-to-noise ratio threshold is not met, the method further includes: If the phased array has limited degrees of freedom and the m-th beam cannot meet all interference suppression requirements, then the interference power of all K beams affected by the m-th beam and whose interference exceeds the threshold is sorted in descending order, and the interference suppression requirements of the first L beams are satisfied first, where L is determined by the degrees of freedom of the phased array.

7. The method according to claim 4, characterized in that, Performing interference suppression on the interference source to reconfigure the target beam includes: At the current moment, the power of the remaining beams within the beam is measured by the coherence of the signals of the remaining beams within the beam; at the next moment, an anti-phase interference signal is constructed using the power of the remaining beams measured at the current moment, and the anti-phase interference signal is superimposed on the received signal to cancel the interference and reconfigure the target beam.

8. A phased array beam interference suppression device, characterized in that, The device includes: The instruction switching module is used to divide the beam switching instruction into a single beam switching instruction and a multi-beam switching instruction after receiving the beam switching instruction, according to the agreed configuration method. The total interference calculation module is used to calculate the total interference of the target beam from the residual beam of the target beam; The target threshold acquisition module is used to compare the total interference with the minimum signal-to-noise ratio threshold of the target beam; An interference suppression module is used to perform interference suppression on the interference source if the minimum signal-to-noise ratio threshold is not met, so as to reconfigure the target beam.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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