Abstract
This paper presents some simulation results on the performances of turbo-codes with multilevel modulation (turbo-TCM) in a wireless environment. The wireless channel is modeled as a frequency selective fading channel with two time delay spread profiles, namely, a two-ray profile and a one-sided exponential profile. Turbo-TCM codes constructed from punctured turbo-codes combined with different modulation schemes are studied. It is found that turbo-TCM achieves unmatched performance of average irreducible BER. Turbo-TCM has much lower error probability than conventional TCM, especially in channels with high delay spread.
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