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Parametric Array Sonar System Based on Maximum Likelihood Detection  

Han, Jeong-Hee (Ocean Research Department, Korea Ocean Research & Development Institute)
Lee, Chong-Hyun (Jeju National University)
Paeng, Dong-Guk (Jeju National University)
Bae, Jin-Ho (Jeju National University)
Kim, Won-Ho (Agency for Defense Development)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.48, no.1, 2011 , pp. 25-31 More about this Journal
Abstract
In the underwater communications, transmitted acoustic signal is corrupted by interference from multipath. A parametric array transducer is capable of radiating a narrow beam with very low sidelobe levels. In certain cases, the parametric array transducer can help the multipath problem. To improve the performance of the underwater communications, the statistical signal processing methods will be required. In the paper, the communication system using a parametric array transducer was demonstrated. To detect the received signal of the communication system based on the on-off keying, the maximum likelihood method using averaged signal for a particular window size is used. The communication system has GUI using LebVIEW which allows the user to change the parameter. The GUI can also be easily modified based on the characteristics of a parametric array transducer. The implemented system can effectively evaluate the performance of the parametric array transducer.
Keywords
Sonar; Parametric array; Underwater communication; Maximum likelihood;
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