从强信号背景中提取微弱信号的DBF算法

DBF Algorithm of Weak Signal Extraction From the Background of Strong Signals

提出了一种利用波束形成技术从强信号与微弱信号的混合中对微弱信号进行盲提取的方法。当强信号与微弱信号的空间间隔大于一个波束宽度时 ,该方法可较好地实现对微弱信号的提取。同时 ,该方法具有不需要估计目标信号的方向、计算量小、对系统误差有一定稳健性的优点。在无系统误差的条件下亦可同时得到最强信号的方位信息。模拟实验验证了该方法的有效性。

A blind DBF algorithm of weak signal from the background of signals is proposed. If the space separation between strong signal and weak signal more than one beam width, the algorithm proposed can effectively extract weak signal without knowing weak signal's direction of arrival. It has small computation load and some robustness with system errors. The direction information of the strongest signals can be gained system errors. The simulation results verify the algorithm.