水下瞬态信号的检测与识别  

Detection and discrimination of underwater transient signal

作　　者：朱代柱[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院

出　　处：《声学技术》2007年第4期592-596,共5页Technical Acoustics

摘　　要：对于水下瞬态信号这种突发性很强、持续时间又非常短、且出现后一般不再重复的信号,如何才能进行全自动的快速有效的检测与识别,是近期国内外研究的热点。针对水下目标快速变速所产生的瞬态信号的自动检测与识别问题,传统信号处理方法难以适用,文中引入了图像处理的有关理念和技术,提出了"取重心处理"的方法,并提出了一种便于工程实现的快速算法。对海试数据的分析结果表明,该方法稳定可靠,有望应用于工程实践中。Automatic detection and discrimination of underwater transient signals have been intensely stu-died.The difficulty lies in the characteristics of sudden bursting of the signals,i.e.,they last for very short time and appear only once.We study automatic detection and discrimination of underwater transient sign-als produced by rapidly moving targets.As traditional methods are unsuitable,a technique based on im-age processing is introduced.The new method takes the ＂gravity center＂ and is suitable for engineering practices.Results of field-test show effectiveness of the method.

关 键 词：瞬态信号 时频谱图 图像处理 检测与识别 

分 类 号：TN911.7[电子电信—通信与信息系统]