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http://dx.doi.org/10.7776/ASK.2013.32.2.095

Performance Evaluation of Underwater Acoustic Communication in Frequency Selective Shallow Water  

Park, Kyu-Chil (Department of Information and Communication Engineering, Pukyong National University)
Park, Jihyun (Department of Information and Communication Engineering, Pukyong National University)
Lee, Seung Wook (Research and Development Department2, Gumi Plant Hanwha Co.)
Jung, Jin Woo (Research and Development Department2, Gumi Plant Hanwha Co.)
Shin, Jungchae (Research and Development Department2, Gumi Plant Hanwha Co.)
Yoon, Jong Rak (Department of Information and Communication Engineering, Pukyong National University)
Publication Information
The Journal of the Acoustical Society of Korea / v.32, no.2, 2013 , pp. 95-103 More about this Journal
Abstract
An underwater acoustic (UWA) communication in shallow water is strongly affected by the water surface and the seabed acoustical properties. Every reflected signal to receiver experiences a time-variant scattering in sea surface roughness and a grazing-angle-dependent reflection loss in bottom. Consequently, the performance of UWA communication systems is degraded, and high-speed digital communication is disrupted. If there is a dominant signal path such as a direct path, the received signal is modeled statistically as Rice fading but if not, it is modeled as Rayleigh fading. However, it has been known to be very difficult to reproduce the statistical estimation by real experimental evaluation in the sea. To give an insight for this scattering and grazing-angle-dependent bottom reflection loss effect in UWA communication, authors conduct experiments to quantify these effects. The image is transmitted using binary frequency shift keying (BFSK) modulation. The quality of the received image is shown to be affected by water surface scattering and grazing-angle-dependent bottom reflection loss. The analysis is based on the transmitter to receiver range and the receiver depth dependent image quality and bit error rate (BER). The results show that the received image quality is highly dependent on the transmitter-receiver range and receiver depth which characterizes the channel coherence bandwidth.
Keywords
Underwater acoustic communication; Underwater acoustic channel; Underwater image transmission;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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