极短时间脉冲信号的检测方法研究  

The research on the detection of very short-time pulse

作　　者：朱代柱[1] 张艳秋[1] 李梅[1] 杜选民[1] 

机构地区：[1]上海船舶电子设备研究所,上海200025

出　　处：《舰船科学技术》2003年第6期21-23,共3页Ship Science and Technology

摘　　要：针对极短时间脉冲信号的检测问题 ,在无法借助于频域分析的情况下 ,阐述了两种检测方法。这两种方法均借助于对时域上背景噪声的统计 ,通过对局部信号能量与背景噪声的对比 ,检测出短时脉冲信号 ,并通过对两次试验数据的分析 。For the condition that analytical methods in frequency domain could not be used in the detection for very short-time pulse, two detective methods are introduced in this paper. In these two methods, the environmental noise is calculated in time domain, and the short-time pulse is detected with the comparison of local signal's energy and noise's. The validity of these two methods are verified by the analysis with lake data and sea data.

关 键 词：短时脉冲 瞬态信号 主动寻的 鱼雷 似然比检测法 能量检测法 

分 类 号：TB56[交通运输工程—水声工程] TN929.3[理学—物理]