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Lattice-based linear precoding for MIMO channels with transmitter CSI
-
- Bergman, Svante, 1979- (author)
- KTH,Signalbehandling,ACCESS Linnaeus Centre
-
- Ottersten, Björn, 1961- (author)
- KTH,Signalbehandling,ACCESS Linnaeus Centre
- (creator_code:org_t)
- IEEE, 2008
- 2008
- English.
- In: IEEE Transactions on Signal Processing. - : IEEE. - 1053-587X .- 1941-0476. ; 56:7, s. 2902-2914
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Herein, the design of linear dispersion codes for multiple-input multiple-output communication systems is investigated. The receiver as well as the transmitter are assumed to have perfect knowledge of the channel, and the receiver is assumed to employ maximum likelihood detection. We propose to use linear precoding and lattice invariant operations to transform the channel matrix into a lattice generator matrix with large minimum distance separation. With appropriate approximations, it is shown that this corresponds to selecting lattices with good sphere-packing properties. Lattice invariant transformations are then used to minimize the power consumption. An algorithm for this power minimization is presented along with a lower bound on the optimization. Numerical results indicate significant gains by using the proposed method compared to channel diagonalization with adaptive bit loading.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Kommunikationssystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Communication Systems (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Keyword
- Channel coding
- communication systems
- fading channels
- multiple-input multiple-output (MIMO) systems
- precoding
Publication and Content Type
- ref (subject category)
- art (subject category)
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