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http://dx.doi.org/10.7776/ASK.2009.28.6.506

Analysis of Capacity for Bi-Directional Coding Applying Time Reversal Technique in Underwater Acoustic Channel  

Kim, Hyeon-Su (인하대학교 전자공학부)
Kwon, Yang-Soo (인하대학교 전자공학부)
Yoo, Jae-Ho (인하대학교 전자공학부)
Chung, Jae-Hak (인하대학교 전자공학부)
Kim, Seong-Il (국방과학연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.28, no.6, 2009 , pp. 506-513 More about this Journal
Abstract
In this paper, we propose a bi-directional communication method applying time reversal technique in underwater acoustic channel in order to exchange data between sensor nodes with an available relay node. The proposed method reduces the conventional 4-step relaying procedure to 2-step and improves the system capacity. Moreover, it increases transmission range efficiently while the relay node can be implemented with low complexity. Simulation results demonstrate that the proposed scheme achieves 3.2 bps/Hz higher capacity than that of the conventional method at SNR 20 dB.
Keywords
Underwater communications; Time reversal; relay; bi-directional coding; Intersymbol interference;
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