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Phased array MIMO beam forming method based on ball invariant constraint and antisymmetry

A phased array, anti-symmetric technology, applied in the field of radar, can solve problems such as performance degradation, achieve more robust and excellent beamforming performance, and reduce the effect of sample requirements

Active Publication Date: 2020-04-03
XIDIAN UNIV
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Problems solved by technology

This method can solve the problem of beamforming performance deterioration caused by a small number of training samples, and can effectively improve the robustness of beamforming when there are errors in actual data, thereby solving the problem of beamforming accuracy of radar antenna arrays

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  • Phased array MIMO beam forming method based on ball invariant constraint and antisymmetry
  • Phased array MIMO beam forming method based on ball invariant constraint and antisymmetry
  • Phased array MIMO beam forming method based on ball invariant constraint and antisymmetry

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Refer to attached figure 1 , to further describe the specific steps for realizing the present invention.

[0040] Step 1, generate a training sample set:

[0041] In the first step, the phased array MIMO receiving signal is generated according to the following formula:

[0042]

[0043] Among them, y represents the echo signal composed of the target signal, interference signal and noise signal transmitted by the receiving and transmitting array with a size of NK×1, N represents the total number of elements of each receiving array of the phased array MIMO radar, and K represents the phase The total number of sub-arrays of the array-controlled MIMO radar transmit array, Indicates the square root operation, M indicates the total number of array elements in each transmit array sub-array of the phased array MIMO radar structure, β s Indicates the reflection c...

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Abstract

The invention discloses a phased array MIMO beam forming method based on ball invariant constraint and antisymmetry. The method comprises the steps: (1) setting a phased array MIMO radar structure, and obtaining a training sample set; (2) obtaining an antisymmetric characteristic covariance matrix; (3) establishing a cost function of phased array MIMO beam forming; (4) calculating the optimal estimated value of the actual steering vector; and (5) calculating a weight vector of beam forming. According to the invention, the problems of strong dependence on sample requirements and inaccurate steering vector direction angle in the prior art are overcome; compared with the prior art, the method has the advantages that the sample demand is effectively reduced, excellent performance can still beobtained under the condition of small samples, the phased array MIMO radar beam forming performance is more stable when observation data and actual data are mismatched, and the beam forming performance is more excellent.

Description

technical field [0001] The present invention belongs to the technical field of radar, and further relates to a beamforming method of phased array MIMO radar based on spherical invariant constraints and antisymmetry in the technical field of phased array MIMO radar; the present invention can be used for the mismatch of observed data when processing radar signals In the case of errors, and the available training samples are less, the beamforming method of phased array MIMO radar can be used. Background technique [0002] Phased-array MIMO radar divides sub-arrays on the basis of traditional MIMO radars, transmits coherent signals in the formed sub-arrays, and transmits mutually orthogonal signals between sub-arrays, so as to have both MIMO radar waveform diversity gain and phased-array radar coherence The advantages of gain. [0003] Adaptive beamforming, also known as spatial adaptive filtering, is to suppress spatial interference and noise, enhance useful signals, and obtai...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S7/02G01S13/00G01S13/02
CPCG01S7/023G01S7/418G01S13/006G01S13/02G01S2013/0245
Inventor 高永婵朱柏泉朱圣棋廖桂生隋兵
Owner XIDIAN UNIV
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