수중 환경에 적합한 블라인드 등화기 설계 및 수중 SIMO 채널에서의 성능 실험

Abstract

In this paper, we dealt with computer simulation and experiments to verify performance of a proposed blind array receiver system based on second order statistics. The proposed receiver was designed to be well operated in underwater evironment. Since the open sea has shape of a cylindrical wave guide, signal estimation in underwater wireless communication field is seriously affected from multi-pathes. An adaptive equalizer using training sequence is a solution to solve this problem, but the use of training sequence reduces the transmission throughput of signals. This paper used blind receiver to reduce this loss, and observed that the proposed receiver system enhanses the performance of blind receiver by using short delay root raised cosine filter. Simulations and anechoic water tank experiments verified that proposed system efficiently recovers the original signal in underwater SIMO channel.