An Iterative Multiuser Detection/Decoding for Nonbinary LDPC Coded MC-MFSK Multiple Access Systems

DOI

10.2991/ccit-14.2014.59How to use a DOI?

Keywords

Nonbinary LDPC codes, Multicarrier MFSK, Multiple Access.

Abstract

This paper studies an iterative multiuser detection and decoding for nonbinary low density parity check (LDPC) coded multicarrier M-ary frequency shift keying (MC MFSK) multiple access system to increase system spectral efficiency under specific signal-to-noise ratio. At multiuser detection side, soft metric for each symbol is quantized to 2 levels (2L) or 3 levels (3L) and then pass to the decoder. When the soft output of a symbol from decoder exceeds a threshold, the user is declared as a reliable symbol. The reliable information is fed back to the detection side and updates the symbol soft output when iterative processing is carried out. Numerical results show that system spectral efficiency is improved for 3L system over Rayleigh fading.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Szu-Lin Su
AU  - Her-Chang Tsai
PY  - 2014/01
DA  - 2014/01
TI  - An Iterative Multiuser Detection/Decoding for Nonbinary LDPC Coded MC-MFSK Multiple Access Systems
BT  - Proceedings of the 2014 International Conference on Computer, Communications and Information Technology
PB  - Atlantis Press
SP  - 224
EP  - 227
SN  - 1951-6851
UR  - https://doi.org/10.2991/ccit-14.2014.59
DO  - 10.2991/ccit-14.2014.59
ID  - Su2014/01
ER  -