基于联合对角化的同频多信号测向技术

发布时间：2018-01-21 20:48

本文关键词： 同频多信号测向分辨率联合对角化盲源分离　出处：《无线电通信技术》2016年06期 　论文类型：期刊论文

【摘要】：针对传统超分辨测向方法在复杂电磁环境中测向分辨率严重下降、干涉仪测向方法不能应用于同频多信号测向、传统盲源分离方法分离性能低等问题,提出了一种基于联合对角化、干涉仪、空间谱等处理方法相结合的同频多信号测向方法。针对盲分离过程中未知源信号数目的问题,提出了基于对角加载的信源个数估计改进方法,为盲源分离提供基础。运用了快速稳定的复数联合对角化盲源分离方法,分别给出了目标矩阵组的确定、对目标矩阵组的降维处理以及分离矩阵的求解方法。对分离出的每个源信号,进行干涉仪和空间谱测向处理。对所提方法与传统测向方法进行了对比分析。
[Abstract]:In view of the serious decline of direction finding resolution of traditional super-resolution direction finding method in complex electromagnetic environment, interferometer direction finding method can not be applied to multi-signal direction finding with the same frequency, and the separation performance of traditional blind source separation method is low. In this paper, a method of homo-frequency multi-signal direction finding based on joint diagonalization, interferometer, spatial spectrum and other processing methods is proposed to solve the problem of the number of unknown source signals in blind separation. An improved method for estimating the number of sources based on diagonal loading is proposed to provide the basis for blind source separation. A fast and stable complex number joint diagonal blind source separation method is used to determine the set of target matrices. The dimensionality reduction of the target matrix group and the solution of the separation matrix, the interferometer and the spatial spectrum direction-finding processing for each source signal are carried out, and the comparison between the proposed method and the traditional direction-finding method is carried out.
【作者单位】：中国电子科技集团公司第五十四研究所;海军704工厂;
【基金】：国家自然科学基金项目(81370038)
【分类号】：TN911.7
【正文快照】： 0引言随着通信技术的不断发展,各种新型通信体制广泛应用,电磁环境日趋复杂,同频多目标信号大量存在,而目前超分辨测向技术在实际电磁环境中特别是在低信噪比下不能有效地进行高分辨测向,无法达到应用需求。传统的干涉仪测向技术[1]只能够实现对非同频信号的测向,当多个信号频

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