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Iterative Demodulation, Demapping, and Decoding of Coded Non-Square QAM.

Authors :
Li, Lifang
Divsalar, Dariush
Dolinar, Samuel
Source :
IEEE Transactions on Communications. Jan2005, Vol. 53 Issue 1, p16-19. 4p.
Publication Year :
2005

Abstract

It is shown that a non-square (NS) 22n+1-ary quadrature amplitude modulation (QAM) can be decomposed into a single parity-check (SPC) block encoder and a memoryless modulator in such a way that the inherent block encoder has a recursive nature. When concatenated with a forward-error-correcting (FEC) code, iterative demodulation, demapping, and decoding of the FEC code and the inherent SPC code of NS-22n+1-QAM is then possible. Simulation results show that coded NS-SQAM performs nearly 2 dB better than standard SQAM and star-8QAM, and nearly 1 dB better than 8-ary phase-shift keying when the FEC code is a rate-1/2, 16-state convolutional code, while coded NS-32QAM performs 0.75 dB better than standard 32QAM. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00906778
Volume :
53
Issue :
1
Database :
Academic Search Index
Journal :
IEEE Transactions on Communications
Publication Type :
Academic Journal
Accession number :
16109710
Full Text :
https://doi.org/10.1109/TCOMM.2004.840633