水声MIMO-OFDM通信系统中基于导频的信道估计算法研究  

Channel Estimation Algorithm Based on Pilot in MIMO-OFDM Underwater Acoustic Communication System

作　　者：王彪[1] 夏捷[1] 张尤赛[1] 

机构地区：[1]江苏科技大学电子信息学院,镇江212003

出　　处：《中国造船》2012年第2期149-155,共7页Shipbuilding of China

基　　金：江苏省高校优势学科建设工程资助项目

摘　　要：正交频分复用(OFDM)和多输入多输出(MIMO)的结合可以有效地对抗多径衰落和码间干扰,大幅度提高水声通信系统的信道容量和传输效率,在高速水声通信中有着重要的发展前景。在分析梳状导频水声MIMO-OFDM通信原理的基础上,结合水声通信及信道传播特点,建立了信道模型,研究水声MIMO-OFDM系统中的信道估计原理和LS(最小平方误差)、MMSE(最小均方误差)算法。通过仿真试验比较两种算法在信道估计中的性能差异,为实际系统设计提供了理论参考。Multiple inputs and multiple outputs-orthogonal frequency division multiplexing （MIMO-OFDM） could effectively resist multi-paths fading and inter symbol interference. It also could raise transmission efficiency and capacity of underwater communication system. This system has a promising future in underwater acoustic （UWA） communication. In this paper, based on comb pilot, we study basic principle for UWA MIMO-OFDM communication system and characteristics of channel transportation, including algorithms of LS （least square） and MMSE （minimum mean square error）. Difference in performance between the two algorithms is analyzed through simulation. The research will provide a theoretical reference for the design of a practical UWA communication system.

关 键 词：正交频分复用 多输入多输出 信道估计 最小平方误差 最小均方误差 

分 类 号：TN929.3[电子电信—通信与信息系统]