Error propagation determined iterative channel estimation with ICI mitigation for fast time-varying OFDM channels |
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| Authors: | Zhang Ji Yang Ruizhe Si Pengbo Zhang Yanhua Yu Richard |
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| Institution: | 1. College of Electronics Information and Control Engineering, Beijing University of Technology, Beijing 100124, P.R.China
2. College of Electronics Information and Control Engineering, Beijing University of Technology, Beijing 100124, P.R.China;Department of Systems and Computer Engineering, Carleton University, Ottawa K1S 5B6, Canada |
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| Abstract: | The intersubcarrier interference(ICI) degrades the performance of the pilot-aided channel estimation in fast time-varying orthogonal frequency division multiplexing(OFDM) systems.To solve the error propagation in joint channel estimation and data detection due to this ICI,a scheme of error propagation determined iterative estimation is proposed,where in the first iteration,Kalman filter based on signal to interference and noise is designed with ICI transformed to be part of the noise,and for the later iterations,a determined iterative estimation algorithm obtains an optimal output from all iterations using the iterative updating strategy.Simulation results present the significant improvement in the performance of the proposed scheme in high-mobility situation in comparison with the existing ones. |
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| Keywords: | orthogonal frequency division multiplexing (OFDM) channel estimation intersubcarrier interference (ICI) error propagation Kalman |
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