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Channel Estimation Method for OFDM Communication System using Adaptive Singular Spectrum Analysis

In the paper the method for OFDM (orthogonal frequency division multiplexing) channel estimation using modified adaptive singular spectrum analysis (SSA) is proposed. The difference of adaptive SSA as compared to usual SSA is additional noise reduction at singular value level. Adaptive SSA- based preprocessing of input data is performed. Adaptive SSA is also used for low rank approximation of linear minimum mean square error (MMSE) estimator. The feasible paths of improvement of the proposed approach are considered. The simulation results related with bit error rate calculation confirm the improved performance of the considered approach in the channel estimation problem.