复杂电磁环境下的雷达信号分离方法

Separation Method of Radar Signals in the Complex Electromagnetic Environment

在复杂的电磁环境下,进一步提高雷达的检测能力是现代雷达面临的紧迫问题之一.为了提高雷达探测精度,需要在众多的干扰信号中有效地提取出雷达信号.鉴于越发明显的常规雷达信号处理方法的局限性,提出了一种基于最大信噪比的信号盲源分离方法.首先利用信噪比越大分离效果越好的特点建立信噪比目标函数,然后通过求解目标函数得到盲信号分离的优化矩阵,最后实现雷达盲信号的分离.仿真结果表明,该方法可对雷达盲信号进行有效的分离,且不需要其它信号处理方法所要求的任何先验知识作为条件.

Under the complex electromagnetic environment, the radar examination ability which is further enhanced is one of the modern radar facing urgent problems. In order to improve the radar surveying precision, it is necessary to withdraw the radar signal effectively from the multitudinous unwanted signals. In view of the even more obvious limitation of the conven- tion radar signal processing methods, one kind of the signal blind source separation method based on the greatest signal-to-noise ratio is proposed. First using the characteristic of bigger and better signal-to-noise ratio the separation effect, the signal-to- noise ratio objective function is established, then the blind signal separation optimized matrix is obtained through the solution of the objective function, finally the radar blind signal separation is realized. The simulation result indicates that this method may carry on the effective separation to the radar blind signal without any priori knowledge which other signal processing methods request to take the condition.