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