Title :
Performance comparison of hard and soft-decision turbo coded OFDM systems
Author :
Savitha, H.M. ; Kulkarni, Muralidhar
Author_Institution :
Department of Electronics and Communication Engg., St. Joseph Engineering College, Mangalore, Karnataka, India
Abstract :
This 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 soft-decision 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.
Keywords :
Concatenated codes; Convolutional codes; Fast Fourier transforms; Forward error correction; Frequency division multiplexing; Iterative decoding; Modulation coding; OFDM modulation; Quadrature phase shift keying; Turbo codes; 16-QAM; Bit error rate; Turbo codes; orthogonal frequency division multiplexing;
Conference_Titel :
Wireless Communications, Networking and Information Security (WCNIS), 2010 IEEE International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
978-1-4244-5850-9
DOI :
10.1109/WCINS.2010.5544146
