Convolutional coding based iterative detection algorithm for DFT-S-GMC systems

A new iterative detection method for discrete Fourier transform spread generalized multi-carrier (DFT-S-GMC) system was proposed. Based on the frequency-domain transceiver structure of DFT-S-GMC system, the linear minimum mean-square error (LMMSE) estimation was performed, which was characterized by...

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Bibliographic Details
Published in:Tongxin Xuebao Vol. 32; no. 3; pp. 33 - 39
Main Authors: Rui, Yun, Tang, Si-Liang, Li, Ming-Qi, Luo, Yin-Hui
Format: Journal Article
Language:Chinese
Published: 01.03.2011
Subjects:
Decoders
Fourier transforms
Likelihood ratio
Probability density functions
Receivers
Spreads
Transceivers
ISSN:1000-436X
Online Access:Get full text
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Summary:A new iterative detection method for discrete Fourier transform spread generalized multi-carrier (DFT-S-GMC) system was proposed. Based on the frequency-domain transceiver structure of DFT-S-GMC system, the linear minimum mean-square error (LMMSE) estimation was performed, which was characterized by the posterior mean and variance. Then, the log likelihood ratio (LLR) information is transferred between detector and decoder according to the probability density function (PDF) of the transmitted symbols. Simulation results show that based on the convolutional decoder, the performance of proposed iterative receiver is much better than the traditional, no-iterative receiver. Moreover, it outperforms the no-iterative receiver based on the Turbo decoder, while its complexity is greatly reduced.
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ISSN:1000-436X