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 elements. 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 elements. It is a convolution mixed model. The blind separation on array signals is a complicated multiple channel deconvolution 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 direction-of-arrival estimation. It is able to process wideband signals compared with common used array signal processing methods. Simulation results show its validity.