Interference suppression method, storage medium and device based on four-dimensional antenna array

Abstract

An interference suppression method, storage medium and device based on a four-dimensional antenna array, which belongs to the field of wireless communication and array signal processing. The present invention solves the problem that when the interference is close to the main lobe direction, the traditional adaptive beamforming technology will cause the main lobe to be distorted and shifted, resulting in poor reception performance of the desired signal. The main technical scheme adopted by the present invention is: step one, set the direction of the expected signal wave, estimate the number of interference signals and the direction of the interference signal wave; step two, configure the four-dimensional antenna array beam pointing, that is, use the fundamental component of the four-dimensional antenna array to point to the direction of the expected signal wave, and use the harmonic component of the four-dimensional antenna array to point to the direction of the interference signal wave; step three, separate the expected signal from the interference signal according to the received signal of the fundamental component and the received signal of each harmonic component. The present invention can be used to suppress interference signals.

Description

Technical Field

[0001] The present invention belongs to the field of wireless communication and array signal processing, and in particular relates to an interference suppression method, storage medium and device based on a four-dimensional antenna array. Background Art

[0002] With the rapid development of electronic technology, the functions of communication system equipment have become increasingly rich and complete. In order to resist various intentional or unintentional interference encountered during the communication process, communication systems often use array antennas as effective anti-interference devices. In the traditional adaptive beamforming anti-interference technology, when the interference is far away from the main lobe direction, as shown in Figure 3(a), a null is formed in the interference direction to offset its influence. However, when the interference gradually approaches the main lobe direction, as shown in Figure 3(b), the application of traditional adaptive beamforming technology will have a certain impact on the main lobe, causing it to distort and deviate from its original position, thereby reducing the desired signal reception performance. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that when the interference is close to the main lobe direction, the traditional adaptive beamforming technology will cause the main lobe to be distorted and shifted, resulting in poor reception performance of the desired signal, and propose an interference suppression method based on a four-dimensional antenna array.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] An interference suppression method based on a four-dimensional antenna array, the method specifically comprising the following steps:

[0006] Step 1: Set the expected signal direction, estimate the number of interference signals and the direction of interference signals;

[0007] Step 2: Configure the four-dimensional antenna array beam pointing, that is, use the fundamental wave component of the four-dimensional antenna array to point to the direction of the desired signal, and use the harmonic component of the four-dimensional antenna array to point to the direction of the interference signal;

[0008] Step 3: Separate the desired signal from the interference signal based on the received signal of the fundamental wave component and the received signals of each harmonic component.

[0009] Furthermore, in the step 1, the number of interference signals and the direction of interference signal waves are estimated by using a spatial spectrum estimation method.

[0010] Furthermore, the harmonic component of the four-dimensional antenna array is used to point to the direction of the interference signal, which is specifically: the +i-th harmonic component of the four-dimensional antenna array is used to point to the direction of the i-th interference signal, i=1,2,…,N, N represents the number of interference signals.

[0011] Furthermore, when the interference signal includes only a single interference signal, the desired signal is separated from the interference signal according to the received signal of the fundamental component and the received signal of the +1 harmonic component, and the specific process is as follows:

[0012] The received signal r1(t) of the fundamental component and the received signal r2(t) of the +1st harmonic component are respectively:

[0013] r1(t)=F0(θ s )s(t)+F0(θ I )I(t) (1)

[0014] r2(t)=F1(θ s )s(t)+F1(θ I )I(t) (2)

[0015] Among them, s(t) represents the desired signal, I(t) represents the interference signal, t represents time, F0(θ s ) is the spatial angle of the four-dimensional antenna array fundamental antenna radiation pattern function is θ s The value of F0(θ I ) is the spatial angle of the four-dimensional antenna array fundamental antenna radiation pattern function is θ I , F0(θ) is the radiation pattern function of the fundamental antenna of the four-dimensional antenna array, θ is the spatial angle, F1(θ s ) is the spatial angle of the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna is θ s The value of F1(θ I ) is the spatial angle of the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna is θ I , F1(θ) is the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna, θ s Indicates the direction of the expected signal, θ I Indicates the direction of the interference signal;

[0016] Combining equations (1) and (2) we can obtain the expected signal s(t).

[0017] A storage medium stores at least one instruction, and the at least one instruction is loaded and executed by a processor to implement an interference suppression method based on a four-dimensional antenna array.

[0018] An interference suppression device based on a four-dimensional antenna array, the device comprising a processor and a memory, the memory storing at least one instruction, the at least one instruction being loaded and executed by the processor to implement an interference suppression method based on a four-dimensional antenna array.

[0019] The beneficial effects of the present invention are:

[0020] The present invention utilizes different harmonics of a four-dimensional antenna array to suppress multiple interferences simultaneously. Compared with the traditional adaptive beamforming anti-interference technology, when the interference direction is close to the main lobe direction, the method of the present invention will not cause main lobe distortion or position shift. Therefore, the method of the present invention will not cause main lobe distortion and reduce the reception performance of the desired signal, and a more accurate desired signal can be obtained. Moreover, compared with the traditional adaptive beamforming anti-interference technology, the method of the present invention can resist higher power interference signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a flow chart of an interference suppression method based on a four-dimensional antenna array of the present invention;

[0022] FIG2( a ) is a harmonic radiation pattern in the present invention when a single interference exists;

[0023] FIG2( b ) is a harmonic radiation pattern in the present invention when there are multiple interferences;

[0024] FIG3(a) is a schematic diagram of the interference (single) direction away from the main lobe in the traditional adaptive beamforming anti-interference mode;

[0025] FIG3( b ) is a schematic diagram of the interference (single) direction close to the main lobe under the traditional adaptive beamforming anti-interference method. DETAILED DESCRIPTION

[0026] Specific implementation method 1. Combination Figure 1 The present embodiment describes an interference suppression method based on a four-dimensional antenna array, and the method specifically includes the following steps:

[0027] Step 1: Set the expected signal direction, estimate the number of interference signals and the direction of interference signals;

[0028] Step 2: Configure the four-dimensional antenna array beam pointing, that is, use the fundamental wave component of the four-dimensional antenna array to point to the direction of the desired signal, and use the harmonic component of the four-dimensional antenna array to point to the direction of the interference signal;

[0029] Step 3: Separate the desired signal from the interference signal based on the received signal of the fundamental wave component and the received signals of each harmonic component.

[0030] The present invention applies four-dimensional antenna array technology to effectively resist interference close to the main lobe direction and improve the receiving performance of the communication system.

[0031] Specific implementation method 2: This implementation method is a further limitation of specific implementation method 1. In step 1, the number of interference signals and the direction of interference signal waves are estimated by using a spatial spectrum estimation method.

[0032] Specific implementation method three: This implementation method is a further limitation of specific implementation method two, and the harmonic component of the four-dimensional antenna array is used to point to the direction of the interference signal. Specifically, the +i-th harmonic component of the four-dimensional antenna array is used to point to the direction of the i-th interference signal, i = 1, 2, ..., N, N represents the number of interference signals.

[0033] When the interference signal contains only a single interference signal, the +1 harmonic component is used to point to the interference signal direction, as shown in Figure 2(a), s(t) represents the desired signal, I(t) represents the interference signal, t represents time, F0(θ) is the radiation pattern function of the fundamental antenna of the four-dimensional antenna array, similarly, F1(θ) is the radiation pattern function of the +1 harmonic antenna of the four-dimensional antenna array, θ represents the spatial angle, θ s Indicates the direction of the expected signal, θ I Indicates the direction of the interference signal.

[0034] When the interference signal contains two interference signals, the +1 harmonic component is used to point to the direction of interference signal 1, and the +2 harmonic component is used to point to the direction of interference signal 2. As shown in Figure 2(b), F2(θ) is the radiation pattern function of the +2 harmonic antenna of the four-dimensional antenna array, I1(t) represents interference signal 1, I2(t) represents interference signal 2, θ I1 Indicates the direction of the interference signal 1, θ I2 Indicates the direction of interference signal 2.

[0035] Specific implementation method 4: This implementation method is a further limitation of specific implementation method 3. When the interference signal only includes a single interference signal, the desired signal is separated from the interference signal according to the received signal of the fundamental component and the received signal of the +1 harmonic component. The specific process is as follows:

[0036] The received signal r1(t) of the fundamental component and the received signal r2(t) of the +1st harmonic component are respectively:

[0037] r1(t)=F0(θ s )s(t)+F0(θ I )I(t) (1)

[0038] r2(t)=F1(θ s )s(t)+F1(θ I )I(t) (2)

[0039] Among them, s(t) represents the desired signal, I(t) represents the interference signal, t represents time, F0(θ s ) is the spatial angle of the four-dimensional antenna array fundamental antenna radiation pattern function is θ s The value of F0(θI ) is the spatial angle of the four-dimensional antenna array fundamental antenna radiation pattern function is θ I , F0(θ) is the radiation pattern function of the fundamental antenna of the four-dimensional antenna array, θ is the spatial angle, F1(θ s ) is the spatial angle of the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna is θ s The value of F1(θ I ) is the spatial angle of the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna is θ I , F1(θ) is the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna, θ s Indicates the direction of the expected signal, θ I Indicates the direction of the interference signal;

[0040] Combining equations (1) and (2) we can obtain the expected signal s(t).

[0041] In the case of multiple interferences, the expected signal is obtained by combining multiple equations and solving multivariate linear functions.

[0042] Specific implementation mode 5: This implementation mode is a storage medium, in which at least one instruction is stored. The at least one instruction is loaded and executed by a processor to implement the interference suppression method based on a four-dimensional antenna array.

[0043] It should be understood that any method described in the present invention may be provided as a computer program product, software or computerized method, which may include a non-transitory machine-readable medium having instructions stored thereon, and the instructions may be used to program a computer system or other electronic device. The storage medium may include, but is not limited to, magnetic storage media, optical storage media; magneto-optical storage media include: read-only memory ROM, random access memory RAM, erasable programmable memory (e.g., EPROM and EEPROM) and flash memory layer; or other types of media suitable for storing electronic instructions.

[0044] Specific implementation method six: This implementation method is an interference suppression device based on a four-dimensional antenna array, and the device includes a processor and a memory. It should be understood that including any device including a processor and a memory described in the present invention, the device may also include other units and modules that perform display, interaction, processing, control, etc. and other functions through signals or instructions;

[0045] At least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to implement the interference suppression method based on a four-dimensional antenna array.

[0046] The above calculation examples of the present invention are only used to explain the calculation model and calculation process of the present invention in detail, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An interference suppression method based on a four-dimensional antenna array, characterized in that: The method specifically comprises the following steps: Step 1: Set the expected signal direction, estimate the number of interference signals and the direction of interference signals; Step 2: Configure the four-dimensional antenna array beam pointing, that is, use the fundamental wave component of the four-dimensional antenna array to point to the direction of the desired signal, and use the harmonic component of the four-dimensional antenna array to point to the direction of the interference signal; The method of using the harmonic component of the four-dimensional antenna array to point to the direction of the interference signal is specifically: using the +i-th harmonic component of the four-dimensional antenna array to point to the direction of the i-th interference signal, i=1, 2, ..., N, N represents the number of interference signals; Step 3: Separate the desired signal from the interference signal according to the received signal of the fundamental component and the received signals of each harmonic component; When the interference signal includes only a single interference signal, the desired signal is separated from the interference signal according to the received signal of the fundamental component and the received signal of the +1 harmonic component, and the specific process is as follows: The received signal r1(t) of the fundamental component and the received signal r2(t) of the +1st harmonic component are respectively: r1(t)=F0(θ s )s(t)+F0(θ I )I(t) (1) r2(t)=F1(θ s )s(t)+F1(θ I )I(t) (2) Among them, s(t) represents the desired signal, I(t) represents the interference signal, t represents time, F0(θ s ) is the spatial angle of the four-dimensional antenna array fundamental antenna radiation pattern function is θ s The value of F0(θ I ) is the spatial angle of the four-dimensional antenna array fundamental antenna radiation pattern function is θ I , F0(θ) is the radiation pattern function of the fundamental antenna of the four-dimensional antenna array, θ is the spatial angle, F1(θ s ) is the spatial angle of the four-dimensional antenna array + 1st harmonic antenna radiation pattern function is θ s The value of F1(θ I ) is the spatial angle of the four-dimensional antenna array + 1st harmonic antenna radiation pattern function is θ I , F1(θ) is the radiation pattern function of the four-dimensional antenna array + 1st harmonic antenna, θ s Indicates the direction of the expected signal, θ I Indicates the direction of the interference signal; Combining equations (1) and (2) we can obtain the expected signal s(t).

2. The interference suppression method based on a four-dimensional antenna array according to claim 1, characterized in that: In the step 1, the number of interference signals and the direction of interference signal waves are estimated by using a spatial spectrum estimation method.

3. A storage medium, characterized in that: The storage medium stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the interference suppression method based on a four-dimensional antenna array as described in any one of claims 1 to 2.

4. An interference suppression device based on a four-dimensional antenna array, characterized in that: The device includes a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement an interference suppression method based on a four-dimensional antenna array as described in any one of claims 1 to 2.

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