An iterative receiver for turbo-coded pilot-assisted modulation infading channels |
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Authors: | Qinghua Li Georghiades CN Xiaodong Wang |
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Affiliation: | Dept. of Electr. Eng., Texas A&M Univ., College Station, TX; |
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Abstract: | 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 |
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