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SUMMARY:Bit-Interleaved Coded Modulation Systems with Quantized Soft-Out D
 emodulators - Clemens Novak\, Vienna University of Technology
DTSTART:20090904T103000Z
DTEND:20090904T113000Z
UID:TALK19680@talks.cam.ac.uk
CONTACT:Rachel Fogg
DESCRIPTION:We study quantization of log-likelihood ratios (LLR) in bit- i
 nterleaved coded modulation (BICM) systems in terms of an equivalent discr
 ete channel. We derive the optimal quantizer for this problem\, which is d
 ifficult to implement in practice\, and therefore we propose an easily imp
 lementable quantizer design.\nWe investigate semi-analytically and numeric
 ally the ergodic and outage capacity over single- and multiple-antenna cha
 nnels of the proposed quantizer and compare it with the optimal quantizer.
 \nFinally\, we show bit error rate simulations for BICM systems with LLR q
 uantization using low-density parity-check codes.\n\nBIO:\nClemens Novak w
 as born in Vienna\, Austria\, in 1980. In 2005 he received the Dipl.-Ing. 
 degree in Electrical Engineering from Vienna University of Technology. Cur
 rently\, he is a Research and Teaching Assistant with the Institute of Com
 munications and Radio Frequency Engineering\, Vienna University of Technol
 ogy\, and works towards his Ph.D. degree.  His research interests are rece
 iver algorithms for multi-user MIMO systems\, especially IDMA systems\, al
 gorithm design using graphical models\, and information theory.\n
LOCATION:LR5\, Engineering\, Department of
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