CMA-Based Channel Estimation for Space-Time Block Coding Transmission Systems

Authors:
Changjiang Xu;Tho Le-Ngoc
Affiliations:
Department of ECE, McGill University, 3480 University Street, Montréal, Québec, Canada H3A 2A7;Department of ECE, McGill University, 3480 University Street, Montréal, Québec, Canada H3A 2A7. tho@ece.mcgill.ca
Venue:
Wireless Personal Communications: An International Journal
Year:
2004

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Abstract

In this paper, we present channel estimation methods for space-time block coding (STBC) transmissions using constant modulus algorithm (CMA). The channel estimates are directly calculated from the convergence value of the CMA. Two algorithms using the channel-vector-based and channel-gain-based constant modulus (CM) criteria are proposed. An approximation of the CM cost function is introduced to allow the use of the recursive least-square (RLS) technique in designing fast RLS-CMA's. Performance of the proposed schemes is evaluated and compared with others using simulation. Illustrative results show that the proposed scheme outperforms the cross-correlated method and can approach the performance of the training-based method.