Adaptive Perturbation-Aided Opportunistic Beamforming

• Published in: IEEE communications letters Vol. 22; no. 8; pp. 1660 - 1663
• Main Authors: Le, Thuan Van, Lee, Kyungchun
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-08-2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptive algorithms; adaptive perturbation; Array signal processing; Beamforming; Computer simulation; Data transmission; Diversity methods; Fading channels; MIMO; multiuser diversity; opportunistic beamforming; Perturbation; Perturbation methods; Signal to noise ratio; Simulation; Throughput
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2018.2843765

This letter proposes a novel opportunistic beamforming algorithm, called adaptive perturbation-aided opportunistic beamforming. In each time slot, the proposed algorithm makes a random adjustment to the beamforming vector. Then, for data transmission, it adopts the successful perturbation, which yields performance improvements. By contrast, the failed perturbation is discarded. In addition to random perturbation, an adaptive component, which depends on the feedback information, is added to generate the next beamforming vector. Simulation results show that the proposed scheme provides significant improvement in terms of system throughput, especially, when there is a small number of mobile stations.