Pattern时延差编码水声通信抗多普勒的差分解码研究  

Research on Doppler-resisting differential decoding in underwater acoustic time pattern delay shift coding communication system

作　　者：赵安邦 解立坤 沈广楠 周彬 惠俊英 

机构地区：[1]哈尔滨工程大学水声技术国防技术重点实验室,哈尔滨150001

出　　处：《声学技术》2009年第4期459-462,共4页Technical Acoustics

基　　金：国家自然科学基金(60802060);重点实验室基金(9140C2001010801);哈尔滨工程大学基础研究基金(HEUFT07072)

摘　　要：研究了Pattern时延差编码(Pattern Time Delay Shift Coding,PTDS)水声通信的差分解码技术。在移动水声通信中,多普勒频偏会对信号产生时间上的压缩或展宽。差分解码通过测量相邻Pattern的时间差进行时延估计完成译码,克服了多普勒频偏在时间上的累加效应,具有更强的抵抗多普勒能力,为移动水声通信技术的研究打下了基础。仿真实验证明所提出的解码方案简单易行、性能优良。Differential decoding in underwater pattern time delay shift coding communication has been studied in the paper. In the moving underwater acoustic communication system, Doppler effects can compress or stretch the signal, in time. Differential decoding method uses the time difference of adjoining patterns to decode the information, and can resist the accumulation of time error induced by Doppler effects. This study provides the foundation for moving un- derwater acoustic communication. Experimental results show that the proposed scheme is simple and has better performance over the original decoding scheme

关 键 词：Pattern时延差编码:多普勒频偏 差分解码 移动水声通信 

分 类 号：TN911.72[电子电信—通信与信息系统]