A study on the timing recovery using peak detector in underwater acoustic communication

In this paper, we present a new timing recovery method using Gardner TED (Timing Error Detector) with a parabolic peak interpolation in underwater acoustic communication. The proposed algorithm has faster timing recovery speed and more accurate than Gardner TED because the sampling values are moved consistently to maximum or minimum point using parabolic peak interpolation. The simulation result shows that the proposed method has the improved BER (Bit Error Rate) performance about 23%. In order to evaluate the performances of the proposed algorithm the sea trial was performed in the ocean. As a result, the proposed algorithm outperforms better BER performance about 20% of timing recovery than the previous Gardner method at 3 km transmitter-receiver distance. Also the proposed method had faster convergence speed about 1.4 times than Gardner method.