Distribution of L-values in Gray-mapped M^2-QAM Signals: Exact Expressions and Simple Approximations
Paper i proceeding, 2007

In this paper we develop formulas for the probability density function (PDF) of the reliability metrics in bit-interleaved coded modulation (BICM) for arbitrary M^2-ary quadrature amplitude modulation (M^2-QAM) with Gray mapping. The advantage of this approach over an entirely general one proposed previously, is that the resulting formulas are obtained without resorting to any algorithmic steps. We also propose Gaussian mixture approximations that are analytically tractable, and we analyze their accuracy when evaluating uncoded bit error rate (BER) and BICM capacity.

Författare

Alex Alvarado

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Leszek Szczecinski

INRS-Energy, Materials and Telecommunications

Rodolfo Feick

Universidad Técnica Federico Santa María

Luciano Ahumada

Universidad Diego Portales

IEEE Global Telecommunications Conference, GLOBECOM 2007

1759-1764

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

DOI

10.1109/GLOCOM.2007.339

ISBN

1424410436