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Effects of PSK Modulation Methods in Underwater Acoustic Communication  

Cho, Jin-Soo (숭실대학교)
Jung, Seung-Back (숭실대학교)
Shim, Tae-Bo (숭실대학교)
Publication Information
The Journal of the Acoustical Society of Korea / v.26, no.7, 2007 , pp. 366-374 More about this Journal
Abstract
In underwater wireless communication, needs for long distance communication using the high frequency are surpassing ones of short range communication by ultrasonic wave, and demands for transmitting and receiving various data such as voice or high resolution image data are increasing as well. In this work, we studied the effects on the real underwater communication depending on the difference of digital modulation methods. Simulation shows that only the performance of GMSK among many other PSK based modulation schemes(BPSK, QPSK, MSK, GMSK) is significant. Test condition simulates the oceanographic conditions along the 207-survey line, 15Km south of Busan and SNR is maintained 35dB or below. Simulated tests are composed of both transmitting image data($3{\times}10^5$ pixel, 4 bit per pixel) and voice communication($10^{-2}$BER, channel capacity of 1Kbps). Test results show that there are gain of about 7 seconds in transmission time in image transmission case, where channel capacity for BPSK, QPSK, and MSK and for GMSK were 65 Kbps and 45 Kbps, respectively and gain of about 8Km in distances in voice communication case.
Keywords
Underwater acoustic communication; Digital modulation; Fading; Multipath; Bit Error Rate;
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Times Cited By KSCI : 1  (Citation Analysis)
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