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On the optimality of beamformer design for zero-forcing DPC with QR decomposition
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. (Signal Processing)ORCID iD: 0000-0003-2298-6774
2012 (English)In: Communications (ICC), 2012 IEEE International Conference on, IEEE , 2012, 2536-2541 p.Conference 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). Beamformers for ZF-DPC are designed to maximize a performance measure, subject to some power constraints and zero-interference constraints. 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 is still unknown. First, we prove that the QRD-based design is indeed 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.

Place, publisher, year, edition, pages
IEEE , 2012. 2536-2541 p.
Series
IEEE International Conference on Communications, ISSN 1550-3607
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-107461DOI: 10.1109/ICC.2012.6364220Scopus ID: 2-s2.0-84871955565ISBN: 978-145772052-9 (print)OAI: oai:DiVA.org:kth-107461DiVA: diva2:575976
Conference
2012 IEEE International Conference on Communications, ICC 2012; Ottawa, ON;10 June 2012 through 15 June 2012
Funder
ICT - The Next Generation
Note

QC 20130118

Available from: 2012-12-11 Created: 2012-12-11 Last updated: 2013-04-11Bibliographically approved

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Bengtsson, MatsOttersten, Björn

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CiteExportLink to record
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  • apa
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