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Beamformer designs for zero-forcing dirty paper coding
University of Oulu. (Dept. Commun. Eng. and CWC,)
University of Oulu. (Dept. Commun. Eng. and CWC,)
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3599-5584
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-2298-6774
2011 (English)In: 2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011, IEEE conference proceedings, 2011Conference paper, Published paper (Refereed)
Abstract [en]

We consider the beamformer design for zero-forcing dirty paper coding (ZF-DPC), a suboptimal transmission technique for MISO broadcast channels (MISO BCs). For the sum rate maximization problem under a total power constraint, the existing beamformer designs in the literature are based on the QR decomposition (QRD), which is used to satisfy the ZF constraints. However, the optimality of the QRD-based design has been unknown previously. In this paper, we prove that the QRD-based design is optimal for ZF-DPC for any performance measure under a sum power constraint. For the per-antenna power constraints, the QRD-based designs become suboptimal, and we propose an optimal design, using a convex optimization framework. Low-complexity suboptimal designs are also presented, and numerically shown to achieve a significant fraction of the sum rate provided by the optimal design.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2011.
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-81399DOI: 10.1109/WCSP.2011.6096955Scopus ID: 2-s2.0-84555195007ISBN: 978-145771010-0 (print)OAI: oai:DiVA.org:kth-81399DiVA: diva2:497424
Conference
2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011. Nanjing. 9 November 2011 - 11 November 2011
Note

QC 20150707

Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2015-07-07Bibliographically approved

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Bengtsson, MatsOttersten, Björn

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  • apa
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  • de-DE
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