DocumentCode
1411894
Title
Iterative demapping for QPSK modulation
Author
ten Brink, S. ; Speidel, J. ; Han, R.-H.
Author_Institution
Inst. of Telecommun., Stuttgart Univ., Germany
Volume
34
Issue
15
fYear
1998
fDate
7/23/1998 12:00:00 AM
Firstpage
1459
Lastpage
1460
Abstract
The authors present an iterative decoding scheme which is particularly suited for quadrature phase shift keying (QPSK) modulation with anti-Gray mapping. At the receiver, a soft demapper accepting a priori information and a convolutional decoder are applied in a serial concatenation. Numerical results are presented for QPSK in additive white Gaussian noise and Rayleigh-fading channels. The iterated system applying anti-Gray mapping outperforms the conventional system using Gray mapping after only one iteration
Keywords
Gaussian noise; Rayleigh channels; convolutional codes; decoding; fading; iterative methods; quadrature phase shift keying; white noise; QPSK modulation; Rayleigh-fading channels; a priori information; additive white Gaussian noise; anti-Gray mapping; convolutional decoder; decoding scheme; iterative demapping; quadrature phase shift keying; serial concatenation; soft demapper;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19981059
Filename
706217
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