Quantization for Soft-Output Demodulators in Bit-Interleaved Coded Modulation Systems
Information Theory
2009-05-06 v1 math.IT
Abstract
We study quantization of log-likelihood ratios (LLR) in bit-interleaved coded modulation (BICM) systems in terms of an equivalent discrete channel. We propose to design the quantizer such that the quantizer outputs become equiprobable. We investigate semi-analytically and numerically the ergodic and outage capacity over single- and multiple-antenna channels for different quantizers. Finally, we show bit error rate simulations for BICM systems with LLR quantization using a rate 1/2 low-density parity-check code.
Cite
@article{arxiv.0905.0606,
title = {Quantization for Soft-Output Demodulators in Bit-Interleaved Coded Modulation Systems},
author = {Clemens Novak and Peter Fertl and Gerald Matz},
journal= {arXiv preprint arXiv:0905.0606},
year = {2009}
}
Comments
to be published at ISIT-2009