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http://dx.doi.org/10.7776/ASK.2014.33.6.407

Underwater Acoustic Communication of FH-MFSK Method with Multiple Orthogonal Properties  

Lee, Hyeung-Woo (한국해양대학교 전파공학과)
Kim, Ki-Man (한국해양대학교 전파공학과)
Son, Yun-Joon (국방기술품질원)
Kim, Woo-Sik (국방과학연구소)
Chun, Seung-Yong (국방과학연구소)
Lee, Sang-Kook (국방과학연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.33, no.6, 2014 , pp. 407-412 More about this Journal
Abstract
In this paper, we propose an underwater acoustic communication of FH-MFSK(Frequency-Hopped Multiple Frequency Shift Keying) system with multiple orthogonal property. Generally, the processing of FSK(Frequency Shift Keying) method is simple, but it is vulnerable to ISI (Inter-Symbol Interference) caused by multipath transmission. In this paper, the orthogonal codes are generated with the same number of transmitting symbols, and these codes are corresponding to multiple frequencies. We used m-sequence to generate multiple orthogonal codes. We compared the performance of proposed method with conventional MFSK method via the experiment. As a result, we confirmed that the proposed method shows 6~10 % lower error rate at 100 bps than conventional method.
Keywords
Underwater acoustic communication; Multipath propagation; Spread spectrum; Frequency hopping; Frequency shift keying; Multiple orthogonal codes;
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Times Cited By KSCI : 4  (Citation Analysis)
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