A Variable Step Size Blind Equalization Algorithm Based on Gamma Distribution

Author:

Zhao Xiang1,Sun Jin Yong1,Tan Han Hong2

Affiliation:

1. Guilin University of Electronic Technology

2. Guangdong University of Science and Technology

Abstract

A variable step size Constant Modulus Algorithm (CMA) based on the gamma distribution is implemented as solutions to optimize the problem of blind equalization. The factor of step size in blind equalization algorithm is varied with gamma variable, in terms of the characteristics of which, the algorithm can search for the globe optimal equalizer weight vector. Simulation results indicate that the convergence rate and the steady Mean Square Errors (MSE) performances of the algorithm proposed are much better than conventional CMA and modified CMA blind equalization algorithms.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference10 articles.

1. John G. Proakis, D, Digital Communications, Fourth Edition., New York, NY, McGraw-Hill, (2001).

2. F. Q. Xiong, Digital Modulation Techniques, Artech House, London, (2000).

3. Paulo S. R. Diniz, Adaptive Filtering: Algorithm and Practical Implementation (Second Edition), Publishing House of Electronics Industry Beijing (2004).

4. C. Richard Johnson, JR, Philip Schniter, Thomas J. Endres, James D. Behm, Donald R. Brown and Raul A. Casas Blind Equalization Using the Constant Modulus Criterion: A Review, proceedings of IEEE, VOL86, NO. 10, October (1998).

5. Gang Xu, Yourong Lu, A hybrid adaptive blind equalization for wireless communication, fifth international symposium on communication systems, networks and digital signal processing (CSNDSP06) (2006).

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