A Study on the Timing Recovery using Peak Detector in Underwater Acoustic Communication

Han, Min-Su; Kim, Ki-Man

Journal of Navigation and Port Research 2012;36(5):371-378.
Published online June 30, 2012.

수중음향통신에서 Peak Detector를 갖는 시간동기회복에 관한 연구

한민수, 김기만

A Study on the Timing Recovery using Peak Detector in Underwater Acoustic Communication

Min-Su Han, Ki-Man Kim

Abstract

This paper presents a timing recovery method using Gardner TED (Timing Error Detector) with a Peak Detector using Parabola Peak Interpolation in underwater acoustic communication. This method will have an eye to improve phase converge speed of timing recovery and reduced amount of Tx data. The OQPSK(Offset Quadrature Phase Shift Keying) modulation technique was considered. The proposed algorithm has faster recovery speed and more accurate than Gardner TED because the sampling values in the proposed algorithm are moved persistingly to maximum or minimum point using parabolic peak interpolation. when simulation performed using Preposed method, it improved BER (Bit Error Rate) performance about 23% And to evaluate the performances of the proposed algorithm the sea trial was performed in the Korean East Sea. And distance of a transmitter-receiver is 3 km each other. As a result, the proposed algorithm outperforms better BER performance about 20% of timing recovery than the Gardner method. Also Proposed method improved converge speed of timing recovery about 1.4 times better than Gardner method.

Key Words: OQPSK;Gardner TED;Parabolic Peak interpolation;Peak Detector;Timing Recovery;underwater communication