Optimal V-BLAST ordering in fast Rayleigh fading: A linear assignment problem
2011 (English)In: IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2011, 366-370 p.Conference paper (Refereed)
We explore a novel approach to perform decoding-order optimization in the vertical Bell Labs layered space-time (V-BLAST) architecture. Allowing for simultaneous transmission of multiple, separately encoded data streams, the V-BLAST transmit-receive scheme applies to the uplink of a multi-user communication system. A multi-antenna receiver decodes data streams successively, dealing with inter-stream interference by means of cancelling and nulling; interference from previously decoded streams is cancelled by subtraction, and remaining interference is nulled by linear equalization. The order in which the streams are decoded can have a noticeable impact on system performance. We consider the optimization of a fixed decoding order in fast Rayleigh fading, based on long-term channel-fading parameters. For a wide range of performance measures, we show that the fast-fading ordering problem can be treated as a classical linear assignment problem, allowing a solution using existing, efficient algorithms.
Place, publisher, year, edition, pages
2011. 366-370 p.
Communication systems, decision feedback equalizers, fading channels, successive interference cancellation, V-BLAST, ZF
IdentifiersURN: urn:nbn:se:kth:diva-60647DOI: 10.1109/SPAWC.2011.5990431ISI: 000299165600074ScopusID: 2-s2.0-80052681544ISBN: 978-142449332-6OAI: oai:DiVA.org:kth-60647DiVA: diva2:477645
IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) JUN 26-29, 2011, San Francisco, USA
QC 201202092012-01-132012-01-132012-04-04Bibliographically approved