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Performance Comparison of Image Transmission in Underwater Acoustic Environment  

Lee, Seung-Woo (ADD)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.11, no.3, 2008 , pp. 19-29 More about this Journal
Abstract
Underwater acoustic(UWA) communication is one of the most difficult field in terms of severe channel environments such as multipath propagation, high temporal and spatial variability of channel conditions. Therefore, it is important to model and analyze the characteristics of underwater acoustic channel such as multipath propagation, transmission loss, reverberation, and ambient noise. In this paper, UWA communication channel is modeled with a ray tracing method and applied to image transmission. Quadrature phase shift keying(QPSK) and multichannel decision feedback equalizer(DFE) are utilized as phase-coherent modulation method and equalization technique, respectively. The objective is to improve the performance of the image transmission using vertical sensor array instead of single sensor in the viewpoint of bit error rate(BER), constellation diagram, and received image quality.
Keywords
Underwater Acoustic Communication; Adaptive Beamformer; Adaptive Equalizer; Underwater Acoustic Channel Modeling;
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