Savitha, H.M.Kulkarni, M.2026-02-062010Proceedings - 2010 IEEE International Conference on Wireless Communications, Networking and Information Security, WCNIS 2010, 2010, Vol., , p. 551-555https://doi.org/10.1109/WCINS.2010.5544146https://idr.nitk.ac.in/handle/123456789/33174This paper compares the performance of hard and soft-decision turbo coded Orthogonal Frequency Division Multiplexing systems with Quadrature Phase Shift Keying (QPSK) and 16-Quadrature Amplitude Modulation (16-QAM). The results show that the softdecision method greatly outperforms the hard-decision method. Using simplified algorithm for the soft-output demapper in the 16-QAM constellation, the complexity of the demapper is greatly simplified. ©2010 IEEE.16-QAMBit error rateorthogonal frequency division multiplexingTurbo codes