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Distribution of Max-Log Metrics for QAM-based BICM in Fading Channels

Leszek Szczecinski ; Alex Alvarado (Institutionen för signaler och system, Kommunikationssystem) ; Rodolfo Feick
IEEE Transactions on Communications (1558-0857). Vol. 57 (2009), 9, p. 2558-2563.
[Artikel, refereegranskad vetenskaplig]

In this paper, we derive closed-form expressions for the probability density functions (PDFs) of the bits' reliability metrics (L-values) in bit-interleaved coded modulation (BICM) transmission over fully-interleaved fading channels. The expressions are valid for the relevant case of quadrature amplitude modulation (QAM) with Gray mapping when the metrics are calculated via the so-called max-log approximation. Using the developed expressions, the performance of coded BICM transmissions is efficiently evaluated, i.e., without resorting to otherwise required two-dimensional numerical integration. The BICM channel capacity for different fading channels and constellation sizes is also evaluated.

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Denna post skapades 2008-05-01. Senast ändrad 2013-10-29.
CPL Pubid: 70563


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Denna publikation ingår i:

On Bit-interleaved Coded Modulation with QAM Constellations