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Phased array-MIMO radar mode transmit-receive beam forming anti-interference method

A phased array and radar technology, used in radio wave measurement systems, complex mathematical operations, instruments, etc., can solve the problems of insufficient research on FPMIMO radar, lack of robust algorithm design, etc., to reduce the number of physical array elements, improve Algorithmic degrees of freedom, the effect of reducing hardware costs

Active Publication Date: 2021-08-31
中国人民解放军火箭军工程大学
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Problems solved by technology

[0004] The purpose of the present invention is to provide a phased array-MIMO radar mode transceiver beamforming anti-jamming method to solve the problems in the prior art that the research on FPMIMO radar in the air domain filtering algorithm is not deep enough and lacks the robustness design of the algorithm

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Embodiment 1

[0067] This embodiment discloses a phased array-MIMO radar mode transceiver beamforming anti-jamming method, wherein the antenna is a ULA including 16 array elements, and is evenly divided into 8 overlapping sub-arrays, adjacent arrays The element spacing is half a wavelength, and the desired target is at the angle θ 0 =10°, there are three interference targets located at θ 1 =-30°, θ 2 =40° and θ 3 =60°, and INR=40dB of all disturbances. During the simulation process, the additive noise signal is modeled as a Gaussian random sequence with a mean of 0 and a variance of 1, and the noise of each array element is independent and identically distributed. The transmit signal parameters are set to the pulse width T p =10μs, bandwidth B =3MHZ, frequency interval f z =3MHZ, sampling frequency f s =20MHZ. For the proposed algorithm, the angle interval where the expected signal is located in the simulation process is set [ θ 0 -5°, θ 0 +5°].

[0068] In order to full...

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Abstract

The invention discloses a phased array-MIMO radar mode transmit-receive wave beam forming anti-interference method, which combines sub-array level array structure characteristics with an FPMIMO radar working mode, adopts a uniform overlapping sub-array division mode for a one-dimensional array, and forms signal receiving and transmitting wave beams in a phased array mode by each sub-array in a signal transmit-receive process. Receiving signals of all sub-arrays can be equivalent to receiving signals of a sub-array level ULA, INCM reconstruction and steering vector estimation are carried out based on the sub-array level ULA, receiving and transmitting wave beams of the FPMIMO radar are estimated by carrying out virtual extension on the steering vector to form the steering vector, virtual reconstruction is carried out by utilizing a main feature vector and a feature value of the reconstructed INCM, and virtual extension INCM of the FPMIMO radar is obtained. Therefore, the robust transmitting and receiving beam forming of the FPMIMO radar of the one-dimensional uniformly overlapped sub-arrays is realized. According to the method, the receiving capability of expected signals is enhanced, the suppression performance of interference signals is improved, and the method has the characteristics of low sidelobe, deep null, good robustness and the like.

Description

technical field [0001] The invention belongs to the field of beam forming of array antennas, and in particular relates to an anti-interference method for transmitting and receiving beams in a phased array-MIMO radar mode. Background technique [0002] In the field of transmit and receive beamforming, there has been a lot of research in the prior art. HPMIMO (Hybrid Phased-Multiple-Input-Multiple-Output) is a working mode of hybrid phased array-multiple-input-multiple-output radar. Chinese patent CN103605122A proposes a dimensionality reduction adaptive DBF method for HPMIMO radar. This method uses a double iteration method to calculate the optimal weight vector required for transceiving beamforming, which reduces the computational complexity of the weight vector calculation process. Zou Jialong et al. studied the HPMIMO radar transceiver beamforming based on the full overlapping sub-array division method, analyzed the influence of the number of array sub-arrays on the perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/42G01S7/36G06F17/16G06F17/14
CPCG01S7/36G01S7/42G06F17/14G06F17/16
Inventor 杨剑胡昌华卢建钟都都涂育维姚志成侯博
Owner 中国人民解放军火箭军工程大学
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