差分扩频技术在移动水声通信中的应用  

An application of the differential spread-spectrum technique in mobile underwater acoustic communication

作　　者：殷敬伟 张晓 孙立强 梅继丹 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001

出　　处：《中国科学：信息科学》2012年第4期436-445,共10页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:51179034;60802060);教育部高等学校博士点基金(批准号:200802171061);上海交通大学海洋工程国家重点实验室开放课题(批准号:1007)资助项目

摘　　要：提出了基于差分相干解调法的DS/BDPSK水声通信技术,在接收端采用差分相干解调的方法,解决了在水声通信中载波估计较难的问题,可克服传输过程中由于载波漂移产生的频率和相位误差.通过计算机仿真研究、湖试试验,验证了该系统在复杂的水声信道中具有较强的抗多径能力、抗多普勒能力,能实现低误码率通信,具有较好的有效性和鲁棒性.A direct sequence/binary differential phase-shift keying underwater acoustic communication technique based on differential coherent demodulation is proposed.Differential coherent demodulation is adopted at the receiving terminal to overcome the difficulty of estimating the carrier in underwater acoustic communication and overcoming the frequency and phase error resulting from carrier frequency drift.Anti-multipath,anti-Doppler,low-error-rate,effective and robust features for a complex underwater acoustic channel were verified in a lake experiment.

关 键 词：多普勒 差分编码 多途干扰 扩频通信 水声通信 

分 类 号：TN929.3[电子电信—通信与信息系统]