University of Cambridge > Talks.cam > Signal Processing and Communications Lab Seminars > Bit-Interleaved Coded Modulation Systems with Quantized Soft-Out Demodulators

Bit-Interleaved Coded Modulation Systems with Quantized Soft-Out Demodulators

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Rachel Fogg.

We study quantization of log-likelihood ratios (LLR) in bit- interleaved coded modulation (BICM) systems in terms of an equivalent discrete channel. We derive the optimal quantizer for this problem, which is difficult to implement in practice, and therefore we propose an easily implementable quantizer design. We investigate semi-analytically and numerically the ergodic and outage capacity over single- and multiple-antenna channels of the proposed quantizer and compare it with the optimal quantizer. Finally, we show bit error rate simulations for BICM systems with LLR quantization using low-density parity-check codes.

BIO : Clemens Novak was born in Vienna, Austria, in 1980. In 2005 he received the Dipl.-Ing. degree in Electrical Engineering from Vienna University of Technology. Currently, he is a Research and Teaching Assistant with the Institute of Communications and Radio Frequency Engineering, Vienna University of Technology, and works towards his Ph.D. degree. His research interests are receiver algorithms for multi-user MIMO systems, especially IDMA systems, algorithm design using graphical models, and information theory.

This talk is part of the Signal Processing and Communications Lab Seminars series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2017 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity