Iterative demodulation and decoding of LDPC-coded M-ary DCSK modulation over AWGN channel

Author

Yibo Lyu ; Guofa Cai ; Lin Wang

Author_Institution

Dept. of Commun. Eng., Xiamen Univ., Xiamen, China

fYear

2014

fDate

2-4 April 2014

Firstpage

1

Lastpage

5

Abstract

In this article, an iterative demodulation and decoding receiver for M-ary differential chaos shift keying (DSCK) modulation is proposed over Additive White Gaussian Noise (AWGN) channel. The Log-Likelihood Ratios (LLRs) of coherent DCSK demodulator and decoder are derived assuming that its perfect carrier synchronization happened. The simulation results show that the performance of our proposed iterative receiver outperform that of the noniterative receiver over AWGN channel due to extrinsic information exchanged between demodulator and decoder. Further-more, Extrinsic Information Transfer chart is used to investigate the convergence behavior of our proposed receiver.

Keywords

AWGN channels; chaos; demodulation; demodulators; iterative decoding; receivers; synchronisation; AWGN channel; LDPC-coded M-ary DCSK modulation decoding; M-ary differential chaos shift keying modulation; additive white Gaussian noise channel; coherent DCSK decoder; coherent DCSK demodulator; convergence behavior; decoding receiver; extrinsic information exchange; extrinsic information transfer chart; iterative demodulation; iterative receiver; log-likelihood ratios; noniterative receiver; perfect carrier synchronization; Decoding; Demodulation; Iterative decoding; Receivers; Simulation; DCSK; Extrinsic information transfer (EXIT) chart; LDPC codes; coherent demodulation; iterative demodulation and decoding;

fLanguage

English

Publisher

ieee

Conference_Titel

Medical Information and Communication Technology (ISMICT), 2014 8th International Symposium on

Conference_Location

Firenze

Type

conf

DOI

10.1109/ISMICT.2014.6825214

Filename

6825214