Robust and distributed beamforming
2009 (English)In: 2009 International Conference on Wireless Communications and Signal Processing, 2009, Vol. WCSP 2009, 1629-1633 p.Conference paper (Refereed)
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.
Place, publisher, year, edition, pages
2009. Vol. WCSP 2009, 1629-1633 p.
Collaborative beamforming, MIMO, Relay, Amplify-and-forward, Distributed algorithm, Distributed beamforming, Error vector, Imperfect channel state information, MIMO relay, Relaxation techniques, Robust beamforming, S-procedures, Beamforming, Optimization, Signal processing, Signal to noise ratio, Channel state information
Telecommunications Communication Systems
IdentifiersURN: urn:nbn:se:kth:diva-35652DOI: 10.1109/WCSP.2009.5371697ISI: 000288686400356ScopusID: 2-s2.0-77749311716ISBN: 978-1-4244-4856-2OAI: oai:DiVA.org:kth-35652DiVA: diva2:429572
International Conference on Wireless Communications and Signal Processing Nanjing, PEOPLES R CHINA, NOV 13-15, 2009