【作者】 王睿； 王海燕； 张颖峰； 朱珠；

【Author】 WANG Rui WANG Hai-yan ZHANG Ying-feng ZHU Zhu (College of Marine of Northwestern Polytechnicai University, Xi’an 710072,

【机构】 西北工业大学航海学院；

【摘要】 混响是近距离水下回波信号探测的主要干扰,由于其特殊的性质,使得混响抑制技术一直是回波信号检测与处理领域的难题。本文基于近距离混响特征研究了最小二乘算法获取混响的平滑特征,通过对消途径抑制混响。丈中仿真产生了低信混比下的回波信号,利用 WVD 估计了回波载频,经蒙特卡罗实验给出了混响抑制前后的回波检测概率,结果表明本文的混响抑制方法可有效的提高回波检测的概率。更多还原

【Abstract】 Reverberation is one of the often interference in the short-distance under water echo detection.As its special characters,so anti-reverberation is the always difficult problem in the echo detection and signal processing.Based on the short-distance reverberation characters this paper has studied the method of least-square to get the smooth characters of reverberation,through the method of cancellation anti-reverberation.This paper’s simulation has given the echo signal under low SNR,and use WVD estimation the echo’s carrier frequency.Through the Monte Carlo experiment has given the rate of echo detection before and after anti-reverberation.The results has indicated that the way of anti-reverberation of this paper could promote the echo detection rate effectively.更多还原