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An iterative receiver for turbo-coded pilot-assisted modulation in fading channels

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3 Author(s)
Qinghua Li ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Georghiades, C.N. ; Xiaodong Wang

We introduce an iterative joint channel and data estimation receiver that exploits both the power of pilot-symbol assisted modulation (PSAM) and turbo coding for fading channels. The key innovation is a low-complexity soft channel estimator which divides a processing block into overlapped cells and performs maximum a posteriori (MAP) sequence estimation and MMSE filtering based on the received signal and extrinsic information delivered by the soft channel decoder. Simulation results show that for turbo-coded PSAM systems under time-variant fading the proposed receiver offers significant performance gains over a non-iterative receiver and two other cancellation schemes.

Published in:

Communications Letters, IEEE  (Volume:5 ,  Issue: 4 )