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Symbol Error Rate Minimization Precoding for Interference Exploitation

Law, KL; Masouros, C; (2018) Symbol Error Rate Minimization Precoding for Interference Exploitation. IEEE Transactions on Communications , 66 (11) pp. 5718-5731. 10.1109/TCOMM.2018.2843784. Green open access

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Abstract

This paper investigates a new beamforming approach for interference exploitation, which has recently attracted interest as an alternative to conventional interference-avoidance beamforming for the downlink of multiple-input multiple-output systems. Contrary to existing interference exploitation approaches that focus on signal-to-noise ratio performance, we adopt an approach based on the detection region of the signal constellation. Focusing on quality of service, we then formulate the optimization for minimizing the error probability (EP) for the worst user, subject to power constraints. We do this by employing the knowledge of channel state information at the transmitter, along with all downlink users' data that are readily available at the base station during downlink transmission. In this context, we also show that the detection-region-based beamforming and the worst user EP downlink beamforming are equivalent problems. Finally, we further propose a sum EPs approach and provide an analytic bound of average symbol error rate performance. Our simulations verify that the proposed techniques provide significantly improved performance over conventional downlink beamforming techniques.

Type: Article
Title: Symbol Error Rate Minimization Precoding for Interference Exploitation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TCOMM.2018.2843784
Publisher version: https://doi.org/10.1109/TCOMM.2018.2843784
Language: English
Additional information: This is an OA article published under the IEEE OA licence.
Keywords: Interference, Array signal processing, Downlink, Optimization, Signal to noise ratio, Precoding, Quality of service
UCL classification: 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/10065087
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