水声扩谱通讯中的自适应多普勒补偿方法

Adaptive Doppler Compensation for Underwater Acoustic Spread-Spectrum Communication

本文介绍了一种水声扩谱通讯中 ,应用子波对多普勒效应进行补偿的方法。针对多普勒效应本身是否会随时间变化 ,分别应用直接估计、自适应估计的方法。其中自适应多普勒补偿方法同自适应信道均衡算法结合在一起 ,对多普勒漂移、信道参数进行联合估计。两种方法都应用了子波变换对多普勒展宽程度进行估计并用线性插值进行补偿。计算机仿真结果令人满意。

This paper introduces an adaptive Doppler compensation method for underwater acoustic spread-spectrum communication Combining the adaptive Doppler compensation with adaptive equalization of channel, Doppler shift and channel parameters are jointly estimated by wavelet transform and LMS update algorithm Then the method employs linear interpolation to compensate for Doppler shift