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Probability Density Functions of Reliability Metrics for 16-QAM-Based BICM Transmission in Rayleigh Channel

Leszek Szczecinski ; Alex Alvarado (Institutionen för signaler och system, Kommunikationssystem) ; Rodolfo Feick
IEEE International Conference on Communications ICC 2007 (2007)
[Konferensbidrag, refereegranskat]

In bit interleaved coded modulation (BICM), the probability density function (PDF) of the reliability metrics (L-values) fully defines the BICM transmission and may be used to analyze it from an information-theoretic point of view. In this paper, the closed-form expressions for the PDF of the L-values in Rayleigh fading channels for 16-QAM with Gray mapping are derived and contrasted with histograms of the L-values obtained via numerical simulations. The obtained closed-forms show that the PDF is either a sum of exponentials or is bounded by such a sum.



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Denna post skapades 2008-01-10. Senast ändrad 2011-03-09.
CPL Pubid: 65506

 

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