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Constructive interference exploitation for downlink beamforming based on noise robustness and outage probability

Law, KL; Masouros, C; (2016) Constructive interference exploitation for downlink beamforming based on noise robustness and outage probability. In: Ding, Z and Zhang, W and Luo, SQ, (eds.) 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2016) [Proceedings]. (pp. pp. 3291-3295). Institute of Electrical and Electronics Engineers (IEEE) Green open access

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Abstract

Quality of service (QoS) is commonly measured in terms of signal to interference plus noise ratio (SINR), where multiuser interference is mitigated in order to improve the performance. As opposed to conventional suppression, interference can be exploited constructively to enhance the desired signal. With the aid of channel state information (CSI) at the transmitter and data information, we study symbol-level downlink beamforming problems based on noise robustness and outage probability, respectively, subject to power constraints. We further show that an equivalence relationship between the noise robustness and outage probability symbol-level downlink beamforming problems can be obtained. Finally, we provide an analytic symbol error rate (SER) upper bound of the worst user by solving the outage probability-based problem. Our simulations demonstrate that the proposed techniques provide substantial performance improvements over conventional downlink beamforming techniques.

Type: Proceedings paper
Title: Constructive interference exploitation for downlink beamforming based on noise robustness and outage probability
Event: ICASSP 2016: IEEE International Conference on Acoustics, Speech and Signal Processing, 20-25 March 2016, Shanghai, China
ISBN-13: 9781479999880
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ICASSP.2016.7472286
Publisher version: http://dx.doi.org/10.1109/ICASSP.2016.7472286
Language: English
Additional information: Copyright ©2016 by The Institute of Electrical and Electronics Engineers, Inc (IEEE). All rights reserved. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: Array signal processing, Noise robustness, Optimization, Quality of service, Upper bound, constructive interference, Downlink beamforming, robust design, error probability, convex optimization
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1499013
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