High diversity detection using semidefinite relaxation
2006 (English)In: 2006 Fortieth Asilomar Conference on Signals, Systems and Computers, 2006, 2082-2086 p.Conference paper (Refereed)
Receiver diversity is an important measure of a receivers robustness towards fading in wireless communications. For the detection of binary symbols transmitted over a general MIMO channel, the semidefinite relaxation (SDR) detector is a computationally attractive alternative to exact ML detection. In the SDR detector, the hard combinatorial optimization problem arising in the ML detector is relaxed into a simple convex optimization problem followed by component wise threshold decisions. In this work, we argue that the SDR detector win provide an increase in diversity over simpler decoder structures such as the ZF and NMSE detectors. Specifically, for the case of uncoded V-BLAST transmission over a MIMO channel with real valued i.i.d. Gaussian channel coefficients we present an analytic result stating that the SDR detector achieves the maximum possible receiver diversity.
Place, publisher, year, edition, pages
2006. 2082-2086 p.
, Conference record of the asilomar conference on signals, systems and computers, ISSN 1058-6393
MIMO systems, Communication systems, Signal processing, Fading channels, Channel coding
Signal Processing Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-34947DOI: 10.1109/ACSSC.2006.355134ISI: 000246925204044ScopusID: 2-s2.0-47049089150ISBN: 978-1-4244-0784-2OAI: oai:DiVA.org:kth-34947DiVA: diva2:427449
40th Asilomar Conference on Signals, Systems and Computers Pacific Grove, CA, OCT 29-NOV 01, 2006
QC 201106282011-06-282011-06-172012-01-23Bibliographically approved