A new joint channel equalization and estimation algorithm for underwater acoustic channels

EURASIP Journal on Wireless Communications and Networking

Gongliang Liu¹  Hongjuan Yang¹  Bo Li¹  Xiyuan Peng¹ 

[1] School of Information and Electrical Engineering, Harbin Institute of Technology (Weihai);

关键词: Equalization;    ISI;    Sparse underwater acoustic channel;    LMS;    Channel estimation;   

DOI  :  10.1186/s13638-017-0955-7

来源: DOAJ

【 摘 要 】

Abstract Underwater acoustic channel (UAC) is one of the most challenging communication channels in the world, owing to its complex multi-path and absorption as well as variable ambient noise. Although adaptive equalization could effectively eliminate the inter-symbol interference (ISI) with the help of training sequences, the convergence rate of equalization in sparse UAC decreased remarkably. Besides, channel estimation algorithms could roughly figure out channel impulse response and other channel parameters through several specific mathematical criterions. In this paper, a typical channel estimation method, least square (LS) algorithm, is applied in adaptive equalization to obtain the initial tap weights of least mean square (LMS) algorithm. Simulation results show that the proposed method significantly enhances the convergence rate of the LMS algorithm.

【 授权许可】

Unknown