Li, A;
Masouros, C;
(2015)
A constellation scaling approach to vector perturbation for adaptive modulation in MU-MIMO.
IEEE Wireless Communications Letters
, 4
(3)
pp. 289-292.
10.1109/LWC.2015.2410271.
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Abstract
It is known that vector perturbation (VP) precoding does not apply to the case where users employ different modulations, while existing solutions for this scenario are suboptimal. In this letter, a joint vector perturbation precoding algorithm is proposed for multiuser MIMO (MU-MIMO) downlink system in the adaptive modulation scenario where different users apply different modulation types. Compared with conventional block diagonalized vector perturbation (BD-VP) and user grouping VP where the search dimension of the perturbation vector is reduced, the proposed algorithm keeps the search dimension unchanged by applying a simple transformation to the VP operation. Our analysis and results show that the proposed algorithm provides an applicable VP solution to the adaptive modulation scenario, with optimal VP performance.
| Type: | Article |
|---|---|
| Title: | A constellation scaling approach to vector perturbation for adaptive modulation in MU-MIMO |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/LWC.2015.2410271 |
| Publisher version: | http://dx.doi.org/10.1109/LWC.2015.2410271 |
| Language: | English |
| Additional information: | © 2015 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: | adaptive modulation, joint perturbation, MIMO, precoding, vector perturbation |
| UCL classification: | UCL 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/1464066 |
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