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http://dx.doi.org/10.7776/ASK.2019.38.1.114

Performance evaluation of a modified waveform shaping filter for the underwater acoustic communication  

Park, Kyu-Chil (Department of Information and Communications Engineering, Pukyong National University)
Jeong, Hyunsoo (Department of Information and Communications Engineering, Pukyong National University)
Park, Jihyun (Department of Information and Communications Engineering, Pukyong National University)
Publication Information
The Journal of the Acoustical Society of Korea / v.38, no.1, 2019 , pp. 114-119 More about this Journal
Abstract
The transmitted acoustic signals are severely influenced by multiply reflected signals from boundaries, such as sea surface and bottom in the shallow water. Very large reflection signals from boundaries cause inter-symbol interference so that the performance of the underwater acoustic communication is degraded. Usually, the waveform shaping filters are used to prevent the reflected signals under this kind of acoustic channel. Especially, the raised cosine filter is widely used, which can also be used to restrict the bandwidth of the transmitted signal. In this study, we evaluate the raised cosine filter for image data transmission in the shallow water, and propose a new modified raised cosine filter. The QPSK (Quadrature Phase Shift Keying) system is used for the underwater acoustic communication simulations with different distances and symbol rates. As a result, the bit error rate was reduced from the minimum 1.0 % to the maximum 32 %.
Keywords
Waveform shaping filter; Underwater acoustic communication; QPSK (Quadrature Phase Shift Keying) system; Raised cosine filter;
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  • Reference
1 T. C. Yang, "Properties of underwater acoustic communication channels in shallow water," J. Acoust. Soc. Am. 131, 129-145 (2012).   DOI
2 W. B. Yang and T. C. Yang, "High-frequency channel chara- cterization for M-ary frequency-shift-keying underwater acoustic communications," J. Acoust. Soc. Am. 120, 2615-2626 (2006).   DOI
3 T. B. Aik, Q. S. Sen, and Z. Nan, "Characterization of multipath acoustic channels in very shallow waters for communications," Proc. of OCEANS'06 Asia-Pacific Conference, 1-8 (2007).
4 J. Park, J. R. Yoon, and J. S. Park, "Frequency and temporal coherence variation for sea surface fluctuation," Jpn. J. Appl. Phys. 48, 07GL03 (2009).
5 J. Park, K. C. Park, and J. R. Yoon, "Underwater acoustic communication channel simulator for flat fading," Jpn. J. Appl. Phys. 49, 07HG10 (2010).
6 J. R. Yoon, K. C. Park, J. Park, and J. Park, "Performance comparison between packet and continuous data transmission using two adaptive equalizers in shallow water," Jpn. J. Appl. Phys. 50, 07HG05 (2015).
7 K. Gentile, "The care and feeding of digital pulse-shaping filters," RF Design, 25, 50-61 (2002).
8 Raised Cosine Filtering, https://kr.mathworks.com/help/comm/examples/raised-cosine-filtering.html.
9 Window Function, https://kr.mathworks.com/help/dsp/ref/windowfunction.html?searchHighlight=window%20function&s_tid=doc_srchtitle.
10 T. S. Rappaport, Wireless Communications: Principles and Practice, 2nd ed. (Prentice Hall, New Jersey, 2002), pp. 400.