摘要
首先研究对解卷积求信道冲击响应匹配方法,在具有相对稳定多途的信道结构模型下,由计算机模拟分析其性能;其次用简化的匹配方法——脉间相关法对实际的海上声传播信号进行计算机处理分析;最后由微处理器等构成了一个用脉间相关法实现匹配的实时信号处理系统,结果表明,由计算机模拟的修正匹配滤波器性能优于常规匹配滤波器;脉冲相关法简化的匹配方法优于拷贝相关器;所设计的系统能实现对信号的实时处理;对随机时变浅海声信道具有较好的匹配能力;检测概率较高而虚警概率趋于零。
Underwater sound channel is the one with random tune-variable, severe multi-path and high noise level interference. The conventional matched filter, with the emitted signal as a reference one, fails to work well in the presence of multipathes and time variability. Notable improvements of corrected matched filter on conventional matched filter are shown by computer simulations. A. real time signal processing system for channel match is constructed by using the pulse-to-puse correlation method. The results show that the system is efficient in the presence of severe multipath and high noise level, and that the system has high detection probability and very low false alarm.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1991年第2期218-222,共5页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金
关键词
浅海声信道
随机时变
脉间相关法
Random time-variable, Underwater sound channel, Puise-to-pulse correlation
