Performance Evaluation of Underwater Acoustic Communication using Transmit Diversity in Water Tank

Park, Chan-Sub; Kim, Ki-Man

Journal of Navigation and Port Research 2013;37(3):269-273.
Published online June 30, 2013.

수조에서 전송 다이버시티를 사용한 수중음향통신의 성능 고찰

박찬섭, 김기만

Performance Evaluation of Underwater Acoustic Communication using Transmit Diversity in Water Tank

Chan-Sub Park, Ki-Man Kim

Abstract

Underwater acoustic channels are generally recognized as one of the most difficult communication media because of the multipath propagation, dispersion, and so on. MIMO (Multiple-input multiple-output) techniques have been actively pursued in underwater acoustic communications recently to increase the data rate over the bandwidth-limited channels. The transmit diversity techniques can be applied in this case, and one of them is Alamouti's scheme. In this paper the performances of the transmit diversity technique are evaluated via experiment. Two transmitters and two receivers were used in experiment, and the experiment was performed in indoor water tank. The error rate 5~8% was confirmed in experimental results, and these are the improved values than the error rate 14.8% for SISO(Single-input single-output) channel under same data rate condition.

Key Words: underwater acoustic communication;transmit diversity;experiment in water tank;Alamouti’s scheme;intersymbol interference;equalizer