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On the optimality of beamformer design for zero-forcing DPC with QR decomposition
Tran, L.-N.; Juntti, M.; Bengtsson, M. et al.
2012In IEEE International Conference on Communications, p. 2536-2541
Peer reviewed
 

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Keywords :
Beamformer design; Beamformers; Broadcast channels; Dirty paper coding; Low-complexity; Maximization problem; Optimal design; Optimality; Optimization framework; Per-antenna power constraints; Performance measure; Power constraints; QR decomposition; Sub-optimal designs; Sum-rate; Total power; Transmission techniques; Zero-forcing; Convex optimization; Design; Image resolution; Optimization; Telecommunication links; Beamforming
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. © 2012 IEEE.
Disciplines :
Electrical & electronics engineering
Identifiers :
eid=2-s2.0-84871955565
Author, co-author :
Tran, L.-N.;  Centre for Wireless Communications, Dept. Commun. Eng., University of Oulu, Oulu, Finland
Juntti, M.;  Centre for Wireless Communications, Dept. Commun. Eng., University of Oulu, Oulu, Finland
Bengtsson, M.;  ACCESS Linnaeus Center, Royal Institute of Technology (KTH), Stockholm, Sweden
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
yes
Language :
English
Title :
On the optimality of beamformer design for zero-forcing DPC with QR decomposition
Publication date :
2012
Event name :
2012 IEEE International Conference on Communications, ICC 2012
Event date :
10 June 2012 through 15 June 2012
Audience :
International
Journal title :
IEEE International Conference on Communications
ISSN :
1550-3607
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), United States - New Jersey
Pages :
2536-2541
Peer reviewed :
Peer reviewed
Commentary :
94823 9781457720529
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since 10 March 2016

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