Zheng, G; Wong, KK; Paulraj, A; Ottersten, B; (2009) Robust and distributed beamforming. In: 2009 International Conference on Wireless Communications & Signal Processing. (pp. ? - ?). IEEE: Piscataway, US.
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This paper studies the use of amplify-and-forward (AF) relays for robust beamforming, with the aid of imperfect channel state information (CSI) at the sender. In particular, the maximization of the worst-case signal-to-noise ratio (SNR) at the destination terminal is studied under a bounded spherical region for the norm of CSI error vector. We show that under a condition on the estimated CSI quality, the robust-optimal collaborative-relay beamforming (CRBF) can be obtained by S-Procedure and rank relaxation techniques. In addition, a distributed algorithm is proposed by examining the structure of the optimal CRBF.
|Title:||Robust and distributed beamforming|
|Additional information:||Conference took place between 13-15 November in Nanjing, China|
|UCL classification:||UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering|
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