Reference : On the optimality of beamformer design for zero-forcing DPC with QR decomposition
Scientific congresses, symposiums and conference proceedings : Paper published in a journal
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/25414
On the optimality of beamformer design for zero-forcing DPC with QR decomposition
English
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 mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
2012
IEEE International Conference on Communications
2536-2541
Yes
International
15503607
2012 IEEE International Conference on Communications, ICC 2012
10 June 2012 through 15 June 2012
Ottawa, ON
[en] 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
[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.
http://hdl.handle.net/10993/25414
10.1109/ICC.2012.6364220
94823
9781457720529

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