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http://dx.doi.org/10.7776/ASK.2014.33.4.255

Underwater Acoustic Communication Using Nonlinear Chirp Signal  

Lee, Chang-Eun (한국해양대학교 전파공학과)
Kim, Ki-Man (한국해양대학교 전파공학과)
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.4, 2014 , pp. 255-261 More about this Journal
Abstract
This paper presents an underwater acoustic communication with nonlinear chirp modulation. The information is carried by the carrier amplitude, frequency or phase in the most common underwater acoustic communications. However, the proposed method includes the information within frequency variation of carrier wave for a symbol. Especially, as carrier wave the hyperbolic frequency modulated signal, one of the nonlinear chirp signal, is used and it is robust in the Doppler channel. The proposed method was analyzed and compared to conventional method by simulation. When the doppler shift existed, the error probability of the proposed method is reduced by 5~12 % than conventional method with linear frequency modulated signal. Sea trial was performed to analyze the performance of the proposed method.
Keywords
Underwater acoustic communication; Multipath propagation; Doppler shift; Linear frequency modulation; Nonlinear chirp; Hyperbolic frequency modulation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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