现代防御技术 ›› 2023, Vol. 51 ›› Issue (2): 100-108.DOI: 10.3969/j.issn.1009-086x.2023.02.012

• 目标特性与探测跟踪技术 • 上一篇    下一篇

改进鸽群算法的复杂信号盲源分离

梁康博, 杨瑞娟, 李晓柏, 骆伟林, 袁凯   

  1. 中国人民解放军空军预警学院 预警情报系,湖北 武汉 430019
  • 收稿日期:2022-04-26 修回日期:2022-09-22 出版日期:2023-04-28 发布日期:2023-05-05
  • 作者简介:梁康博(1998-),男,安徽亳州人。硕士生,研究方向为信号盲源分离。
  • 基金资助:
    中国国防科技创新区基金(17H86304ZT00302)

Blind Source Separation of Complex Signals Based on Improved Pigeon-Inspired Optimization

Kangbo LIANG, Ruijuan YANG, Xiaobai LI, Weilin LUO, Kai YUAN   

  1. Department of Intelligence,Air Force Early Warning Academy,Wuhan 430019,China
  • Received:2022-04-26 Revised:2022-09-22 Online:2023-04-28 Published:2023-05-05

摘要:

由各类侦察、干扰、探测、通信信号构成的复杂信号盲源分离是侦干探通一体化系统接收信号处理的第一步,对盲源分离准确度要求更高。传统独立成分分析的盲源分离方法,存在容易求得局部最优解、分离性能较差等缺陷。针对这些问题,提出了一种改进鸽群算法的复杂信号盲源分离方法,通过在鸽群算法的地图和指南针算子中添加位置因子,以及在地标算子中添加压缩因子2种方式,平衡了算法前期全局探索能力以及后期局部搜索准确度,解决了易陷入局部最优以及早熟收敛的问题,提升了算法的寻优能力,同时该算法在收敛速度上也有所提升。仿真实验结果表明,该算法在低噪声和高噪声情况下均能较好地分离出复杂信号,对比传统独立成分分析的方法,具有更好的分离性能和收敛速度。

关键词: 盲源分离, 侦干探通一体化, 改进鸽群算法, 位置因子, 压缩因子

Abstract:

Blind source separation of complex signals composed of reconnaissance, interference, detection, and communication signals is the first step in the processing of received signals in the integrated reconnaissance, interference, detection, and communication system, which requires higher accuracy of blind source separation. The traditional blind source separation method based on independent component analysis has such defects as the easy acquisition of local optimums and poor separation performance. To solve these problems, this paper proposes an improved pigeon-inspired optimization algorithm for blind source separation of complex signals. A location factor is added to the map and compass operators of the pigeon-inspired optimization algorithm, and a compression factor is added to the landmark operator. In this way, the global exploration ability in the early stage and the local search accuracy in the later stage of the algorithm are balanced, and the problems of the easy fall into local optimums and premature convergence are solved. The optimization ability and convergence speed of the algorithm are improved. Simulations show that the algorithm proposed in this paper can better separate complex signals under low and strong noise. Compared with the traditional independent component analysis method, the algorithm has better separation performance and convergence speed.

Key words: blind source separation, integrated reconnaissance, interference, detection, and communications, improved pigeon-inspired optimization, location factor, compression factor

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