Experimental Demonstration of Underwater Acoustic Communication Based on Bidirectional Decision Feedback Equalizer

doi:10.3969/j.issn.1000-1093.2016.03.023

Abstract

Abstract: A robust single carrier underwater acoustic communication system is designed by combining bidirectional decision feedback equalizer (DFE) with passive time reversal mirror (PTRM). At the receiver, PTRM is used to suppress the multipath spread and focus the signal energy. And then the bidirectional DFE is used to combine the outputs from the traditional DFE and the backward DFE, decreasing the errors brought by a wrong decision and improving the robustness of traditional DFE. The data processing results from a shallow water experiment in underwater acoustic channel stable environment show that the bidirectional DFE could get some processing gain, and the output signal-to-noise ratios are increased by 2.74 dB, 2.36 dB, and 1.54 dB at 5 km, 7 km, and 10 km, respectively. The decoding performance is effectively improved compared with the traditional DFE.

Key words: communication, underwater acoustic communication, passive time reversal mirror, bidirectional decision feedback equalizer, robustness

CLC Number:

TB567

HAN Xiao， SHENG Xue-li， YIN Jing-wei， LIU Bing. Experimental Demonstration of Underwater Acoustic Communication Based on Bidirectional Decision Feedback Equalizer[J]. Acta Armamentarii, 2016, 37(3): 553-558.

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