摘要
频谱分析已被广泛应用于信号处理技术中。本文介绍了瞬时频率序列分析方法，讨论了频谱分析与时间域瞬时频率分析之间的关系．重点介绍了瞬时频率序列及其低阶矩在水声信号处理中的应用．海试及湖试结果与理论分析和计算机仿真结果一致．本文提出的瞬时频率方差估计器用于窄ＣＷ脉冲的检测可显著提高抗脉冲干扰的能力。
Frequency speCtrum analysis has been widely used in the area of signal processing. A method of frequency analysis in time domain is presented in this paper. The relation of frequency speCtrum analysis and frequency analysis in time domain is discussed. The method of transient frequency analysis and its applications on underwater acoustic signal processing is introduced. The experimental resultS both in a lake and at the sea meet with that of theoretical analysis and simulation in computer. The estimator of transient frequency variance used to detect short CW pulse has improved the detective ability of a system in the background with pulse interference significantly.
出处
《声学学报》
EI
CSCD
北大核心
1995年第4期280-288,共9页
Acta Acustica
