A Study on the Optimization of Linear Equalizer for Underwater Acoustic Communication

Lee, Tae-Jin; Kim, Ki-Man

Journal of Navigation and Port Research 2012;36(8):637-641.
Published online October 31, 2012.

수중음향통신을 위한 선형등화기의 최적화에 관한 연구

이태진, 김기만

A Study on the Optimization of Linear Equalizer for Underwater Acoustic Communication

Tae-Jin Lee, Ki-Man Kim

Abstract

In this paper, the method that reduce a computation time by optimizing computation process is proposed to realize low-power underwater acoustic communication system. At first, dependency of decision delay on tap length of linear equalizer was investigated. Variance is calculated based on this result, and the optimal decision delay bound is estimated. In addition to decide optimal tap length with decision delay, we extracted the MSE(Mean Square Error) graph. From the graph, we obtained variance value of the MSE-decision delay, and estimated the optimum decision delay range from the variance value. Also, using the extracted optimal parameters, we performed a simulation. According to the result, the simulation employing optimal tap length, which is only 40% of maximum tap length, showed a satisfactory performance comparable to simulation employing maximum tap length. We verified that the proposed method has 33% lower tap length than maximal tap length via sea trial.

Key Words: Low-power Underwater Acoustic Communication;Linear Equalizer;Tap Length;Decision Delay;Mean Square Error;Computational load