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Statistical Precoding With Decision Feedback Equalization Over a Correlated MIMO Channel
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-2298-6774
Dresden University of Technology (TUD), Germany.
2010 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 58, no 12, 6298-6311 p.Article in journal (Refereed) Published
Abstract [en]

The decision feedback (DF) transceiver, combining linear precoding and DF equalization, can establish point-to-point communication over a wireless multiple-input multiple-output channel. Matching the DF-transceiver design parameters to the channel characteristics can improve system performance, but requires channel knowledge. We consider the fast-fading channel scenario, with a receiver capable of tracking the channel-state variations accurately, while the transmitter only has long-term, channel-distribution information. The receiver design problem given channel-state information is well studied in the literature. We focus on transmitter optimization, which amounts to designing a statistical precoder to assist the channel-tailored DF equalizer. We develop a design framework that encompasses a wide range of performance metrics. Common cost functions for precoder optimization are analyzed, thereby identifying a structure of typical cost functions. Transmitter design is approached for typical cost functions in general, and we derive a precoder design formulation as a convex optimization problem. Two important subclasses of cost functions are considered in more detail. First, we explore a symmetry of DF transceivers with a uniform subchannel rate allocation, and derive a simplified convex optimization problem, which can be efficiently solved even as system dimensions grow. Second, we explore the tractability of a certain class of mean square error based cost functions, and solve the transmitter design problem with a simple algorithm that identifies the convex hull of a set of points in R-2. The behavior of DF transceivers with optimal precoders is investigated by numerical means.

Place, publisher, year, edition, pages
IEEE , 2010. Vol. 58, no 12, 6298-6311 p.
Keyword [en]
Communication systems, decision feedback equalizers, fading channels, MIMO systems, precoders
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-27374DOI: 10.1109/TSP.2010.2070499ISI: 000284361700026ScopusID: 2-s2.0-78649242493OAI: diva2:376868
QC 20101213Available from: 2010-12-13 Created: 2010-12-13 Last updated: 2012-05-23Bibliographically approved

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Jarmyr, SimonOttersten, BjörnJorswieck, Eduard A.
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ReferencesLink to record
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