能量比时间延迟估计法及在定位中的应用

The Time Delay Estimation Based on the Energy Ratio and its Application on the Locolization

本文针对在噪声干扰下不能用相关方法确定时间延迟的复杂信号，提出用能量比函数来检测在噪声中信号的到达时刻，由此来估计不同测点信号是的时间延迟，并分析了噪声对该方法的影响．最后给出了该方法在定位问题中的应用。

The energy ratio function has been developed to detect the arrival of signals in the noise. By the determination of the signal arrival point in the noise for each channel,the time delay among the signals in different channel may be estimated. The influence of the noise to the estimation has been annalysed. The estimation method has also been used in the locolization and the effectiveness has been demonstrated.