At last, result and discussion of Song-Hua lake data processing are presented which show that Time-Frequency analysis can be a propose way to detect signal echo under a certain Signal-to-Noise.

• 最后,将时频分析和信号处理的技术应用于湖试数据,对环境噪声干扰和纯混响干扰两种不同条件下目标回波的检测作了分析,结果表明在一定的信噪比条件下,时频分析可作为一种检测信号回波的方法。