NDLI: Iterative demodulation, demapping, and decoding of coded non-square QAM

Content Provider	IEEE Xplore Digital Library
Author	Lifang Li Divsalar, D. Dolinar, S.
Copyright Year	1972
Abstract	It is shown that a non-square (NS) 2/sup 2n+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-2/sup 2n+1/-QAM is then possible. Simulation results show that coded NS-8QAM performs nearly 2 dB better than standard 8QAM 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.
Starting Page	16
Ending Page	19
Page Count	4
File Size	181676
File Format	PDF
ISSN	00906778
Volume Number	53
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Demodulation Iterative decoding Quadrature amplitude modulation Concatenated codes Constellation diagram Parity check codes Code standards Phase shift keying Convolutional codes Modulation coding quadrature amplitude modulation (QAM) Bit-error rate (BER) iterative decoding iterative demapping
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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