Iterative demapping for QPSK modulation
- 23 July 1998
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 34 (15) , 1459-1460
- https://doi.org/10.1049/el:19981059
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
This publication has 2 references indexed in Scilit:
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- A comparison of optimal and sub-optimal MAP decoding algorithms operating in the log domainPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002