Home > Table of Contents

 

Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 86-89

Frequency Domain Constant Modulus Algorithm Based on Fractionally Spaced Blind Equalizer

Yecai Guo, Chao Yang, and Rengang Lin

Full text: PDF

Abstract

Aiming at the disadvantages of large mean square error(MSE) and slow convergence rate of Constant Modulus Algorithm(CMA), a frequency domain constant modulus algorithm based on fractionally spaced blind equalizer(FS-FCMA) is proposed. In this proposed algorithm, fractionally spaced blind equalizer is used to avoid the spectrum aliasing caused by the sub-sampling and decrease the MSE effectively, and FFT technique and overlapping retention algorithm is employed for realizing the frequency domain constant modulus algorithm to improve the convergence performance of equalizer and to reduce the computational complexity greatly. The FS-FCMA has smaller MSE and faster convergence rate comparison with the constant modulus algorithm in time domain(TCMA) and constant modulus algorithm in time domain based on fractionally spaced blind equalizer(FS-TCMA). The good performance was simulated using underwater acoustic channel.

Index Terms

constant modulus algorithm; fractionally spaced equalizer; FFT overlapping retention algorithm

Copyright @ 2009 ACADEMY PUBLISHER All rights reserved