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Statistical Precodi...
Statistical Precoding With Decision Feedback Equalization Over a Correlated MIMO Channel
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- Jarmyr, Simon, 1982- (författare)
- KTH,Signalbehandling,ACCESS Linnaeus Centre
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- Ottersten, Björn, 1961- (författare)
- KTH,Signalbehandling,ACCESS Linnaeus Centre
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- Jorswieck, Eduard A., 1975- (författare)
- Dresden University of Technology (TUD), Germany
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(creator_code:org_t)
- IEEE, 2010
- 2010
- Engelska.
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Ingår i: IEEE Transactions on Signal Processing. - : IEEE. - 1053-587X .- 1941-0476. ; 58:12, s. 6298-6311
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- Communication systems
- decision feedback equalizers
- fading channels
- MIMO systems
- precoders
- Signal processing
- Signalbehandling
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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