毫米波被动探测信号的熵特征研究

Research on the Entropy Feature of Analysis of Passive Millimeter Wave Detection Signal

摘要:

针对毫米波被动探测系统中以幅度值作为判决特征时,容易将无源干扰(如平面金属、地面积水等)误识别为装甲目标的问题,提出了毫米波被动探测信号的新特征量——熵;从毫米波被动探测典型地物目标的天线温度基本组成出发,提出了熵的提取方法;对一定样本量的地物探测信号进行熵特征分析,结果表明装甲目标的熵与平面金属及地面积水有明显差异,对装甲目标识别的研究提供了新的分析思路和理论指导。

Abstract:

In passive millimeter wave detection system, it is easy to be passive jamming (such as planar metal, ground water, etc.) mistakenly identified as an armored target, when the signal amplitude value was deemed as a decisive characteristic. In order to solve this problem, this paper proposes a new feature named as entropy. According to the antenna temperature’s composition of typical targets, proposed the extraction method of signal entropy feature. Analyzed a large number of detection signal entropy features, the results showed that the entropy feature of armored target significantly different with planer metal and ground water. The results of this paper provide a new analytical thinking and theoretical guidance for the armored target identification.