应用声表面波功率倒谱技术检测回波时延

Detecting Echo Time Dealy with SAW Power Cepstrums Analysis

多径效应环境中,接收的信号是混响信号,它由主波和一些回波所组成。一般的方法不易检测时延,且无处理增益。应用SAW功率倒谱技术能实现检测出回波时延信息,而且有处理增益,即能在噪声淹没的信号中提取时延。本文介绍应用SAW功率倒谱技术检测时延的原理,同时给出提高信噪比的实验结果。

In the invironment with multipath effect, the received signals are reverberation signals which consist of dominant wave and echo signals. Through ordinary method, the time delay of echoes can not be easily detected and without processing gains, while the echo time dealy can be detected using SAW power cepstrurras analysis, and obtained processing gains,e.g.to draw the time delay information from the signals submerged in noises. This paper presents the principle of SAW power ceps'tru ms technique applied in detecting time delay, and the experimental results for improving the signal-noise ratio as well.