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

Volume

2

fYear

2003

fDate

14-17 Dec. 2003

Firstpage

1550

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on

Conference_Location

Nanjing

Print_ISBN

0-7803-7702-8

Type

conf

DOI

10.1109/ICNNSP.2003.1281175

Filename

1281175