Zheng, G;
Wong, KK;
Paulraj, A;
Ottersten, B;
(2009)
Collaborative-relay beamforming with perfect CSI: Optimum and distributed implementation.
IEEE Signal Processing Letters
, 16
(4)
pp. 257-260.
10.1109/LSP.2008.2010810.
Abstract
This letter studies the collaborative use of amplify-and-forward (AF) relays to form a virtual multiple-input single-output (MISO) beamforming system with the aid of perfect channel state information (CSI) in a flat-fading channel. In particular, we optimize the relay weights jointly to maximize the received signal-to-noise ratio (SNR) at the destination terminal with both individual and total power constraints at the relays. We show that the optimal collaborative-relay beamforming (CRB) solution achieves the full diversity of a MISO antenna system. Another main contribution of this letter is a distributed algorithm that allows each individual relay to learn its own weight, based on the Karush-Kuhn-Tucker (KKT) analysis. © 2009 IEEE.
| Type: | Article |
|---|---|
| Title: | Collaborative-relay beamforming with perfect CSI: Optimum and distributed implementation |
| DOI: | 10.1109/LSP.2008.2010810 |
| UCL classification: | UCL > School of BEAMS UCL > School of BEAMS > Faculty of Engineering Science |
| URI: | http://discovery.ucl.ac.uk/id/eprint/55857 |
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