WSEAS Transactions on Signal Processing
Print ISSN: 1790-5052, E-ISSN: 2224-3488
Volume 10, 2014
Estimation of Multipath Fading Channel Using Fractal Based VSLMS Algorithm
Authors: ,
Abstract: This paper evaluates the performance of fractal based variable step-size LMS (FB-VSLMS) algorithm on the estimation of multipath fading channel for nonstationary process transmission. The algorithm exploits the statistics of the nonstationary process and uses non-diagonal step-size matrix to design an adaptive LMS filter in order to estimate slow fading correlated Rayleigh channel, in particular, asymptotically stationary AR channel and Jakes channel. Analytic expressions of steady-state mean-square weight error (MSWE) and optimum step-size parameter are computed for these channels. The analytical expression of optimum step-size would enable reliable channel estimation in real time. Simulation results are compared with analytic expressions developed in this paper and are shown to agree with good conformity.
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Keywords: Rayleigh fading channel, channel estimation, variable step-size LMS algorithm, nonstationary signals.
Pages: 230-241
WSEAS Transactions on Signal Processing, ISSN / E-ISSN: 1790-5052 / 2224-3488, Volume 10, 2014, Art. #24