基于子阵级处理的宽带非规则子阵相控阵鲁棒性干扰抑制

doi:10.12305/j.issn.1001-506X.2024.02.01

Abstract

Abstract:

A robust interference suppression method based on subarray level processing is proposed for the poor performance of wideband irregular subarray phased arrays in complex interference environments. Firstly, the subarray level echo model of wideband array with errors is established. The wideband linear frequency modulation echo signal can be transformed into narrowband signal through the subarray digital Stretch processing and the effective bandwidth of processing can be reduced. Then, the method of interference and noise covariance matrix reconstruction based on spectral separation is further improved, and the measured prior information is used to divide the molecular interval to decrease the reconstruction area and reduce the amount of computation. Finally, the optimal weight is used to weight each channel data to obtain the array output. The proposed method makes good use of the advantages of irregular subarrays and avoids the presence of gate lobes in the pattern of regular subarrays. It can also suppress interference in the case of multiple combination interference and error, and has strong robustness.

Key words: wideband, subarray level processing, robustness, interference suppression

CLC Number:

TN958

Jiyuan CHEN, Zhenhai XU, Shunping XIAO. Robust interference suppression of wideband irregular subarrayed phased array based on subarray level processing[J]. Systems Engineering and Electronics, 2024, 46(2): 367-380.

Figures/Tables 21

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参数	取值	参数	取值
阵列规模	64×64	信号脉宽/μs	50
子阵大小	8单元	参考距离/km	50
LFM信号中心频率/GHz	10	目标相对参考位置的距离/m	10
信号带宽/GHz	1	SNR/dB	-5
距离窗/m	120	目标方位/(°)	(10, 10)

干扰	INR/dB	相对距离/m	来波方位/(°)
窄带干扰	40	-20	(-10, 10)
宽带噪声干扰	20	-10	(10, -5)

干扰	INR/dB	相对距离/m	来波方位/(°)
窄带干扰	40	-20	(-10, 10)
宽带干扰	20	-10	(10, -5)

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Robust interference suppression of wideband irregular subarrayed phased array based on subarray level processing

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