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Lattice-based linear precoding for MIMO channels with transmitter CSI
KTH, Skolan för elektro- och systemteknik (EES), Signalbehandling. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
KTH, Skolan för elektro- och systemteknik (EES), Signalbehandling. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0003-2298-6774
2008 (engelsk)Inngår i: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 56, nr 7, s. 2902-2914Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
IEEE , 2008. Vol. 56, nr 7, s. 2902-2914
Emneord [en]
Channel coding, communication systems, fading channels, multiple-input multiple-output (MIMO) systems, precoding
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URN: urn:nbn:se:kth:diva-17647DOI: 10.1109/tsp.2008.917844ISI: 000257195800024Scopus ID: 2-s2.0-46749150550OAI: oai:DiVA.org:kth-17647DiVA, id: diva2:335691
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QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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