Abstract
The channel estimation of space-time (ST) block coding transmission using the constant modulus algorithm (CMA) is investigated. The ST block coding transmission is represented by an orthogonal vector-channel model. Based on this orthogonal model, a general expression of linear decoding decision rules for ST block codes and the sufficient and necessary conditions for convergence of the CMA are derived. It is shown that the CMA directly converges to a vector-channel under the orthogonal condition. A channel estimation method using the convergence value of the CMA is proposed for ST block coding transmission systems and is suitable for 1-D signaling or 2-D signaling using a square constellation. Illustrative results show that the proposed scheme provides a better accuracy than the cross-correlated method.
Published Version
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