水声通信中多普勒系数估计方法研究

Study on Doppler Coeffcients Estimate in Underwater Acoustic Communication

本文针对水声通信中的多普勒效应,提出一种基于Notch滤波器的多普勒系数估计方法,该方法利用Notch滤波器对经过信道的窄带CW脉冲信号频率进行估计,进而得到多普勒系数,并与基于宽带信号的多普勒系数方法进行对比分析。通过计算机仿真基于CW脉冲频率估计与基于宽带信号的多普勒系数估计方法就估计性能进行了对比研究,详细地给出了两种方法各自的优缺点与适用场合。

According to the Doppler Effect in the underwater acoustic communication,this paper puts forward Doppler coefficient estimation based on Notch filter.This method makes use of Notch filter to estimate the channel narrowband CW pulse signal frequency,and then gets the Doppler coefficient,and makes a comparative analysis of the Doppler coefficient based on the broadband signal.Finally,the paper makes a comparative study through the computer simulation based on the CW pulse frequency estimation and Doppler coefficient estimation based on the broadband signal,and gives two methods of their advantages and disadvantages and occasions of application.