narrow band system meaning in Chinese

窄带体系
窄带系统，窄频带制
窄带制

Abstract : 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
文摘: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