激光回波的目标检测算法

目标检测的阈值法经常用于检测目标的回波信号。它的性能取决于信噪比,当信噪比大于6.7时,能够检测出目标。为了提高信噪比,经常采用匹配滤波器。如果系统是窄带系统,噪声为色噪声,无法使用匹配滤波器,不能提高信噪比。激光回波信号的几何特征不同于噪声。提出了一种利用这种几何特征检测目标的算法。当信噪比大于2时,该算法能够检测出目标。该算法已经实际应用。

Target detection algorithm of laser echo

The threshold algorithm of the target detection is often used to detect target echo signals.Its performance is based on signals-noise ratio.When signals-noise ratio is great than 6.7,the target can be detected.In order to increase the signals-noise ratio,matching filter is often used.If the system is narrow band system,the noise is color noise and matching filter cannot be used.Therefore,the signals-noise ratio cannot be increased.However,the geometrical characteristic of the laser echo signal is different with the noise.This paper advises the algorithm that detects the target by the geometrical characteristic.When signals-noise ratio is great than 2,this algorithm can detect target.This algorithm has been used in practice.