Title :
Probability Density Functions of Reliability Metrics for 16-QAM-Based BICM Transmission in Rayleigh Channel
Author :
Szczecinski, Leszek ; Alvarado, Alex ; Feick, Rodolfo
Author_Institution :
Univ. of Quebec, Montreal
Abstract :
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.
Keywords :
Rayleigh channels; modulation coding; probability; quadrature amplitude modulation; statistical analysis; 16-QAM-based BICM transmission; Rayleigh fading channel; bit interleaved coded modulation; closed-form expression; gray mapping; histogram; probability density function; reliability metrics; Channel capacity; Closed-form solution; Decoding; Fading; Interleaved codes; Modulation coding; Performance analysis; Probability density function; Quadrature amplitude modulation; Rayleigh channels;
Conference_Titel :
Communications, 2007. ICC '07. IEEE International Conference on
Conference_Location :
Glasgow
Print_ISBN :
1-4244-0353-7
DOI :
10.1109/ICC.2007.172
