浅海信道下的时间反转MFSK水声通信

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (6): 1189–1194.

浅海信道下的时间反转MFSK水声通信

曹秀岭，陈东升，童峰*

出版日期:2015-11-14 发布日期:2015-11-14
作者简介:(厦门大学水声通信与海洋信息技术教育部重点实验室厦门 361005)
基金资助:
基金项目:国家自然科学基金(11274259),福建省自然科学基金(2015J01172)
收稿日期:2015-07-05
*通讯联系人,E-mail:ftong@xmu.edu.cn

Research of time reversal MFSKunderwater acoustic communication in shallow-water channel

CaoXiuling,ChenDongsheng,TongFeng*

Online:2015-11-14 Published:2015-11-14
About author:(Key Laboratory of Underwater Acoustic Communicationand Marine Information Technique of the Ministry of Education,Xiamen University, Xiamen 361005)

摘要/Abstract

摘要： MFSK(Multiplefrequencyshiftkeying)水声通信具有实现简单方便、性能稳健等优点,但在浅海信道较为严重的信道多径条件下其性能受到很大影响.虚拟时间反转镜(Virtualtimereversalmirror,VTRM)可通过空间时间聚焦有效抑制信道多径,已广泛应用于相干水声通信系统.提出将虚拟时间反转镜引入浅海信道MFSK 水声通信中进行多通道时反处理抑制多径,并采用下变频处理有效降低了MFSK 系统中时反处理的运算复杂度,同时通过对探针信号进行逐帧更新增强对信道时变的适应能力.浅海信道海试实验结果证实了本文方案的有效性.

Abstract: Multiple Frequency Shift Keying（MFSK） underwater acoustic communication has the advantages of simple, convenient and stable performance, but its performance is greatly affected by the channel multipath conditions in the shallow water channel. Virtual time reversal mirror（VTRM） can effectively suppress the channel multipath through space time focusing, which has been widely used in the coherent underwater acoustic communication system. In this paper, we propose to introduce the virtual time reversal mirror in the shallow water channel MFSK underwater acoustic communication, and to suppress the multipath in multi channels. And the lower frequency conversion processing is effective in reducing the computational complexity of the MFSK-VTRM system, and the adaptation ability of the probe signal is enhanced by the frame update. The sea trial experiment results in the shallow sea channel confirm the validity of this scheme

曹秀岭，陈东升，童峰*. 浅海信道下的时间反转MFSK水声通信[J]. 南京大学学报(自然科学版), 2015, 51(6): 1189–1194.

CaoXiuling,ChenDongsheng,TongFeng*. Research of time reversal MFSKunderwater acoustic communication in shallow-water channel[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(6): 1189–1194.

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