Iterative Joint Channel Estimation and Signal Detection for OFDM System in Double Selective Channels |
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| Authors: | Yih-Haw Jan |
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| Affiliation: | 1.Department of Digital Living Innovation,Nan Kai University of Technology,Caotun Township,Taiwan, ROC;2.Department of Mechanical Engineering,Nan Kai University of Technology,Caotun Township,Taiwan, ROC;3.Department of Gerontic Technology and Service Management,Nan Kai University of Technology,Caotun Township,Taiwan, ROC |
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| Abstract: | Intercarrier interference caused by fast time-varying multipath fading channels degrades the system performance of high-mobility orthogonal frequency division multiplexing systems. This study considers the challenging problem of joint channel estimation and signal detection in high mobility environments. The estimation method is based on a pilot-aided linear approximation channel modeling and iterative process. After each iteration, the channel estimates are refined with the fed-back detection signal. The channel is re-estimated iteratively, detected increasingly reliable signals. The proposed method is independent of the Doppler-spectrum, delay-profile shape and the number of paths. Numerical simulation results indicate that the proposed method is highly robust to fast time-varying multipath fading channels. |
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