Performance Analysis of CSS Based Low-Power Underwater Communication Systems in Western Sea of Korea 


Vol. 45,  No. 2, pp. 344-354, Feb.  2020
10.7840/kics.2020.45.2.344


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  Abstract

As the importance of exploration for underwater resources, observation for underwater environment, disaster monitoring, and marine defense increases, research on underwater communication technology is being conducted actively. OFDM(Orthogonal Frequency Division Mutiplexing), CDMA(Code Division Multiple Access), and chirp signals are widely used as a transmission method for underwater communications. The chirp signal means that the frequency changes continuously over time, and is used in LFM(Linear Frequency Modulation), HFM(Hyperbolic Frequency Modulation), Zad-offchu, and CSS(Chirp Spread Spectrum) methods. The CSS method has high robustness against noise and Doppler shift. Due to this characteristic, the CSS method is widely used in commercialization systems for low power communication on land. In this paper, the performance of the CSS method is analyzed based on the at-sea experiment. In order to assess the robustness against the noise and Doppler shift, comparison of the performance between the CSS and OFDM methods is conducted in the shallow waters near Taean-gun, Chungcheongnam-do. It is analyzed by the results of the experiment that the CSS method shows the improved bit error rate and block error rate compared to the OFDM method. In addition, performance of the CSS methods with different spreading factors(SFs) and bandwidth is analyzed. It is analyzed by the CSS methos with SF of 8 has good robustness against noise and Doppler shift. Therefore, it is feasible to use the CSS method with the SF of 8 and the variable bandwidth for adaptive data rate for reliable underwater communication.

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  Cite this article

[IEEE Style]

T. Lee, J. Kim, H. Ko, Y. Cho, "Performance Analysis of CSS Based Low-Power Underwater Communication Systems in Western Sea of Korea," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 2, pp. 344-354, 2020. DOI: 10.7840/kics.2020.45.2.344.

[ACM Style]

Tae-Seok Lee, Jun-Ho Kim, Hak-Lim Ko, and Yong-Ho Cho. 2020. Performance Analysis of CSS Based Low-Power Underwater Communication Systems in Western Sea of Korea. The Journal of Korean Institute of Communications and Information Sciences, 45, 2, (2020), 344-354. DOI: 10.7840/kics.2020.45.2.344.

[KICS Style]

Tae-Seok Lee, Jun-Ho Kim, Hak-Lim Ko, Yong-Ho Cho, "Performance Analysis of CSS Based Low-Power Underwater Communication Systems in Western Sea of Korea," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 2, pp. 344-354, 2. 2020. (https://doi.org/10.7840/kics.2020.45.2.344)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880