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Distribution of L-values in Gray-mapped M^2-QAM Signals: Exact Expressions and Simple Approximations

Alex Alvarado (Institutionen för signaler och system, Kommunikationssystem) ; Leszek Szczecinski ; Rodolfo Feick
IEEE Global Telecommunications Conference, GLOBECOM 2007 (2007)
[Konferensbidrag, refereegranskat]

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.

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Denna post skapades 2007-12-20. Senast ändrad 2011-03-09.
CPL Pubid: 63688


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