基于波束域预处理的阵列盲信号分离方法  

Array Blind Signal Separation Method Based on Beamspace Pre-processing

作　　者：游鸿[1] 于文震[1] 张铁军[2] 

机构地区：[1]南京电子技术研究所,南京210039 [2]总参陆航部驻上海地区军事代表室,上海200233

出　　处：《现代雷达》2012年第1期53-57,共5页Modern Radar

摘　　要：相控阵雷达采用多个阵元进行信号的接收处理,其多通道信号处理可以采用盲信号处理的方法进行目标源信号分离。由于阵元间距导致信号在阵元间产生相位延迟,在进行盲分离的时候一般只能采用卷积混合模型,盲分离过程是较为复杂的多通道反卷积问题。文中对阵列接收信号进行波束域预处理,通过确定的空间波束相位补偿,将阵元域的多时延混合信号变换为瞬时混合信号,从而采用简单的实数分离算法即可完成信号分离,分离信号可用于后置处理。所提方法简单有效,相比常规阵列信号处理方法,可直接适用于宽带信号。仿真实验验证了其有效性。Phased array radar receives signals from multiple array dements. It is a kind of multiple channel signal processing system and source signals can be separated using blind signal processing. The source signal arrives at separated elements at time delays according to the distance between dements. It is a convolution mixed modd. The blind separation on array signals is a complicated multiple channel deconvalution problem. A novel method is proposed to transform it to a simple instantaneous linear mixture of source signals, which includes the beamspace pre-processing and space beam phase compensation. Then simple real separation algorithms can be used at the transformed beam mixture of source signals to extract source signals. The separated signals can be used on post-processing such as correlation processing or dircction-of-arrival estimation. It is able to process wideband signals compared with common used array signal processing methods. Simulation results show its validity.

关 键 词：盲信号分离 阵列信号处理 波束域预处理 

分 类 号：TN911.7[电子电信—通信与信息系统]