摘要
本文论述一种独特的信号处理方式——数字时间相关积累及其在浅海声信道中的应用。共分三部份:(Ⅰ)自相关积累;(Ⅱ)互相关积累;(Ⅲ)抗多途径性能分析。本文(Ⅰ)论述数字自相关积累。首先实验研究了浅水信道中信号和噪声的统计特性,进而讨论了自相关积累的工作原理和基本结构,侧重地估算几种典型声呐系统的虚警概率、检测概率和输入信噪比及其关系。理论估算和实验证明,自相关积累信号处理方式适用于随机时-空变、强多途和高噪声级的复杂浅水信道,对于低速率的情况具有普遍意义。
A specific signal processing scheme-digital time correlative accumulation and its application to shallow-water acoustic channel are here introduced. There are three parts in total, (I) the auto-correlative accumulation, (II) the cross-correlative accumulation, (III) the anti-multipath ability.
This paper discusses the first part. The statistic characteristics of the signal and noise are first analysed, then the principle and basic structure of the auto-correlative accumulation scheme are described. The detection probability, false-alarm probability and input (S/N) are estimated for some typical sonar systems. Theoritical estimations and experiments in site have proved that the scheme can be used in the acoustical channel with temporal-spacial variables, multipath and high noise level and have a performance tending to optimum detection system in radio channel.
出处
《声学学报》
EI
CSCD
北大核心
1990年第3期208-214,共7页
Acta Acustica
基金
国家自然科学基金
