Analysis of new variable step-size NLMS-based algorithm for OFDM systems
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Abstract
New variable step-size normalised least mean square (NLMS) algorithm is proposed for frequency domain equalisation in the orthogonal frequency division multiplexing (OFDM) systems. An optimal variable step-size approach is introduced how to derive with the method of mean square deviation scheme based on NLMS algorithm. An adaptive frequency domain equalisation approach based on the variable step-size NLMS algorithm is presented with regard to the proposed optimal variable step-size algorithm for OFDM-based systems. We present simulation results to compare the proposed algorithm on the basis of their performance and rate of convergence. Simulation results show that the bit error rate as well as the mean square error can be reduced by the proposed algorithm. The proposed algorithm can be achieved in terms of fast convergence and robustness in comparison with the existing algorithm.
Article Details
Copyright @2021 Engineering Transactions
Faculty of Engineering and Technology
Mahanakorn University of Technology
References
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