声纳信号宽容性检测指数的初步分析

The preliminary analysis of robustness detection index of sonar signal processing

自20世纪60年代以来,信号的宽容性(Robust,Robustness)处理就开始在统计数学与信号处理领域受到关注。由于声纳使用的水声环境的特殊复杂性,从事声纳信号处理和声纳设计的学者对环境适应性处理和宽容性水声信号处理开展了大量的研究。主要的目的是探索水声环境效应以及对声纳信号处理的影响,企图寻求一种适应环境的宽容性信号处理方法。本文初步探讨水声信号处理领域宽容性检测的基本概念,给出一种度量宽容性性能的数量指标。同时推导在不同声速剖面下声纳检测宽容性指标和所使用频率的关系。对文中所提出的理论方法与国内外实际海试的某些实例进行了分析比较。

Since 60＇s of last century, the concept of robust the field of mathematical statistics and signal processing signal processing has attracted many interests in Because the special complexity of underwater acoustic environment, which is the main applying fields of sonar system, the sonar designer and researchers in sonar detection field have pay more attention to study environment matched processing and robust underwater acoustic signal processing. The main research objective is to evaluate the effects of underwater acoustic environment for the sonar signal processing, trying to find a technique, which can match the complexity of ocean environment. In this paper the basic concept of robust signal processing and robust detection are preliminarily studied. A quantitative index for robustness is presented. The relationship between robustness index and sound speed profile was derived, which depends on sonar frequency. The results of theoretical analysis and at sea experiment, reported from Chinese and over sea literatures, were analyzed and compared.