A new hybrid blind equalization algorithm with steady-state performance analysis

Authors:
Ning Xie;Hengyun Hu;Hui Wang
Affiliations:
College of Information Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China and State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecomm ...;College of Information Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China;College of Information Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
Venue:
Digital Signal Processing
Year:
2012

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Abstract

The dithered signed-error constant modulus algorithm (DSE-CMA) is an approach less computationally than CMA but exhibits ill-convergence. On the contrary, the concurrent CMA with soft decision-directed scheme (CMA+SDD) improves the convergence rate of CMA by adding SDD but brings lots of computational complexity. As a tradeoff, in this paper we combine the virtues of DSE-CMA and SDD, then propose a new algorithm, which compensates the phase shift and provides convergence faster than DSE-CMA with lower complexity than CMA+SDD. More importantly, an approximation of its steady-state mean square error performance is derived. Simulation results show the superiority of the proposed algorithm.