可抑制端向干扰的线阵恒低旁瓣加权波束形成方法研究

doi:10.12305/j.issn.1001-506X.2025.03.04

摘要/Abstract

摘要：

针对线阵旁瓣高且端向干扰抑制能力差的问题, 把虚源干扰法加权改进引入至均匀线阵波束形成, 提出一套通用易行的虚源空间分布和参数初始化方案, 改进寻优迭代中的主瓣引导、协方差估计、权系数归一等方法, 可达成全空间方位(包括端向)上的恒低旁瓣加权波束形成, 且可自动抑制来自端射方向的连续强干扰, 特别适合于拖线阵应用。通过仿真和海试数据实例分析, 对比常规的无加权和加权波束形成方法, 从指向性图、二维空间谱、预成波束输出等方面, 验证本文方法的有效性。

关键词: 恒低旁瓣, 加权波束形成, 虚源干扰法, 均匀线阵, 端向干扰

Abstract:

In order to solve the problems of high side-lobe and weak suppression of end directional interferences for a linear array, the virtual sources interference method is modified and introduced into the weighted beamforming of uniform linear array. A set of general and feasible solution is proposed to distribute virtual sources and initialize parameters. Secondly, the approaches are improved of the main-lobe guidance, the covariance matrix estimation, the weighted coefficients normalization and so on in the optimizing iteration. Then, the weighted beamforming method can achieve const low side-lobe level at the full-space directions, and can suppress the end directional continuous strong interferences effectively. Therefore, it is suitable for the towed linear array case especially. Based on numerical simulations and sea-trial data instances, compared with the common weighted and un-weighted beamforming methods, the effectiveness of this modified method is demonstrated from the aspects of directivity pattern, two-dimensional spatial spectrum, pre-beamforming output and so on, where the suppression capability analysis of end directional interferences is emphasized.

Key words: constant low side-lobe level, weighted beamforming, virtual sources interference method, uniform linear array, end directional interference

中图分类号:

TN911.7

王平波, 贾耀君, 卫红凯, 陈强. 可抑制端向干扰的线阵恒低旁瓣加权波束形成方法研究[J]. 系统工程与电子技术, 2025, 47(3): 709-719.

Pingbo WANG, Yaojun JIA, Hongkai WEI, Qiang CHEN. Weighted beamforming method study with end directional interferences suppression and constant low side-lobe level for uniform linear array[J]. Systems Engineering and Electronics, 2025, 47(3): 709-719.

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