ABSTRACT: We provide a performance comparison of multiple-input multiple-output (MIMO) demodulators for bit-interleaved coded modulation (BICM) systems with non-iterative demodulation and decoding. Even though widely used in literature for demodulator comparison, coded bit error rate (BER) has the drawback of being strongly dependent on the outer error correcting code. This motivates us to propose a code-independent performance measure in terms of system capacity, i.e., mutual information of the equivalent modulation channel that comprises modulator, wireless channel, and demodulator. We present numerical results for ergodic and quasi-static channels. These results reveal that the performance ranking of MIMO demodulators is rate-dependent. Furthermore, they provide new insights regarding MIMO-BICM system design, specifically the joint selection of demodulation scheme, antenna configuration, and symbol constellation for a prescribed target rate.
Capacity-based performance comparison of MIMO-BICM demodulators
Weekly Seminar02 April 2009
Speaker: Peter Fertl, Ph.D. candidate
Place: CTTC Auditorium/ 10:00h
Peter Fertl, from the Technische Universität Wien, will present a performance comparison of multiple-input multiple-output (MIMO) demodulators for bit-interleaved coded modulation (BICM) systems with non-iterative demodulation and decoding.
SPEAKER: Peter Fertl received the Diplom-Ingenieur degree in Electrical Engineering at the Vienna University of Technology, Austria, in 2005. Currently, he is a research assistant at the Institute of Communications and Radio Frequency Engineering, Vienna University of Technology, where he is working towards his Ph.D. degree. He is participating in the European Union projects MASCOT ("Multiple-Access Space-Time Coding Testbed"), WWTF project MOHAWI ("Modern Harmonic Analysis Methods for Advanced Wireless Communications"), and FWF project "Information Networks" within the National Research Network SISE. From July to September 2007 he held a position as visiting researcher at Nokia Research Center in Helsinki, Finland. His current research interests comprise multi-user MIMO wireless communication systems with special focus on MIMO demodulation techniques; iterative joint channel estimation and decoding; pilot-assisted channel estimation in OFDM systems; and distributed beamforming for wireless relay networks.