Title :
Optimized Mappings for Iteratively Decoded BICM on Rayleigh Channels with Interleaving
Author :
Clevorn, Thorsten ; Godtmann, Susanne ; Vary, Peter
Author_Institution :
Inst. of Commun. Syst. & Data Process., RWTH Aachen Univ.
Abstract :
A cost function for the optimization of mappings for bit-interleaved coded modulation systems with iterative decoding (BICM-ID) for a Rayleigh channel with applied IQ interleaving is derived. For this channel model the optimum mapping depends on the channel quality and on the rotation of the signal constellation set. Simulation results reveal that mappings optimized with the new cost function yield a better performance than previously known mappings. Furthermore, a second, easy procedure to obtain the optimum rotation angle for a signal constellation set in conjunction with IQ interleaving is described
Keywords :
Rayleigh channels; channel coding; interleaved codes; iterative decoding; modulation coding; IQ interleaving; Rayleigh channels; bit-interleaved coded modulation systems; channel quality; iteratively decoded BICM; signal constellation set; AWGN; Approximation algorithms; Cost function; Demodulation; Fading; Feedback; Interleaved codes; Iterative decoding; Optimized production technology; Rayleigh channels;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683223
