On the Asymptotic Performance of Bit-Wise Decoders for Coded Modulation
Artikel i vetenskaplig tidskrift, 2014

Two decoder structures for coded modulation over the Gaussian channel are studied: the maximum likelihood symbol-wise decoder, and the (suboptimal) bit-wise decoder based on the bit-interleaved coded modulation paradigm. We consider a 16-ary quadrature amplitude constellation labeled with a Gray labeling. It is shown that the asymptotic loss in terms of pairwise error probability, for any two codewords caused by the bit-wise decoder, is bounded by 1.25 dB. The analysis also shows that the asymptotic loss is zero for a wide range of linear codes, including all rate-1/2 convolutional codes.

pulse-amplitude modulation

coded modulation

logarithmic likelihood ratio

Gray code

bit-interleaved coded modulation

pairwise error probability

Additive white Gaussian noise

Författare

Mikhail Ivanov

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

Fredrik Brännström

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

Erik Agrell

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

IEEE Transactions on Information Theory

0018-9448 (ISSN)

Vol. 60 5 2796-2804

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1109/TIT.2014.2312726

Mer information

Senast uppdaterat

2018-03-29