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Constructive Interference Based Constant Envelope Precoding

Amadori, PV; Masouros, C; (2016) Constructive Interference Based Constant Envelope Precoding. In: 2016 IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) [Proceedings]. Institute of Electrical and Electronics Engineers (IEEE) Green open access

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Abstract

We present a new multiple-input-multiple-output (MIMO) transmission scheme for generic phase-shift-keying (PSK) modulations in the multi-user (MU) downlink channel, where Constant Envelope Precoding (CEP) is combined with concepts of interference exploitation. In the proposed approach, multi-user-interference (MUI) is treated as a resource for increasing the signal-to-interference-and-noise-ratio (SINR) at the receiver side, in contrast with conventional precoding schemes from the literature which aim to minimize MUI. Two different CEP schemes are presented: a first technique, based on the application of the cross-entropy solver, and a two-step approach, based on an initial relaxation of the power constraints and a subsequent enforcement of per-antenna power constraints. The benefits of the proposed algorithms are evaluated in terms of computational costs and achievable symbol error rate (SER) in a perfect channel state information (CSI) scenario for different modulation orders. The analytical and numerical results show that interference-exploitation concepts are able to further extend the benefits of classical CEP.

Type: Proceedings paper
Title: Constructive Interference Based Constant Envelope Precoding
Event: 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2016), 3-6 July 2016,
Location: Edinburgh, ENGLAND
Dates: 03 July 2016 - 06 July 2016
ISBN-13: 9781509017492
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/SPAWC.2016.7536765
Publisher version: http://dx.doi.org/10.1109/SPAWC.2016.7536765
Language: English
Additional information: Copyright © 2016 IEEE. 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: Science & Technology, Technology, Engineering, Electrical & Electronic, Telecommunications, Engineering, Constant-Envelope Precoding, Multiuser Mimo, Massive Mimo, Massive Mimo Systems, Green Signal Power, Performance, Wireless, Downlink, Channel
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/1517274
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