Title :
A novel turbo iterative OFDM receiver in the flat-fading channel
Author :
Zhangyong, Ma ; Yaran, Liu ; Chunming, Zhao ; Xiaohu, You
Author_Institution :
Nat. Mobile Commun. Lab, Southeast Univ., Nanjing, China
Abstract :
For QPSK-modulated OFDM system, the combination with an outer soft in/soft out (SISO) channel decoder allows to further improve the performance by means of iterative channel estimation and Turbo decoding. However, in order to avoid serious error propagation when the SNR (signal to noise ratio) is low, the weighted iterative estimation algorithm is proposed. The simulation results show that the proposed algorithm improves the system performance dramatically compared with the conventional scheme.
Keywords :
OFDM modulation; channel estimation; iterative decoding; quadrature phase shift keying; turbo codes; SNR; error propagation; flat fading channel; iterative channel estimation; orthogonal frequency division multiplexing; quadrature phase shift keying modulated OFDM; signal to noise ratio; soft in/soft out channel decoder; turbo decoding; turbo iterative OFDM receiver; AWGN; Baseband; Channel estimation; Demodulation; Fading; Iterative algorithms; Iterative decoding; OFDM; Signal to noise ratio; Turbo codes;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281175
