Turbo channel estimation and equalization of STBC-OFDM system over time-varying wireless channels
作者： Mohamed A. S. Hassan , A. Hmidat , Ali Ukasha
DOI: 10.1109/CONIELECOMP.2010.5440796
关键词:
摘要: This paper presents an iterative (turbo) channel estimation and turbo equalization when orthogonal frequency division multiplexing (OFDM) has been concatenated to space-time block code (STBC) over time-varying multipath Rayleigh fading channels. Based on the Kalman filter estimator, soft-input-soft-output (SISO) minimum mean square error (MMSE) equalizer a maximum posterior probability (MAP) decoder, estimate can be improved for each iteration by using soft information feedback from decoder. Computer simulations show good tracking with only few training (pilot) symbols even signals experience deep fading. It is observed that overall system performance 4dB after 14 iterations compared non-iterative equalization. The proposed method shown obtain fast low complexity which are requirements in
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