Amadori, PV;
Masouros, C;
(2017)
Constant envelope precoding by interference exploitation in phase shift keying-modulated multiuser transmission.
IEEE Transactions on Wireless Communications
, 16
(1)
pp. 538-550.
10.1109/TWC.2016.2626279.
Preview |
Text
Amadori_07738555.pdf - Published Version Download (1MB) | Preview |
Abstract
We introduce a new approach to constant-envelope precoding (CEP) based on an interference-driven optimization region for generic phase-shift-keying modulations in the multi-user (MU) multiple-input-multiple-output downlink. While conventional precoding approaches aim to minimize the multi-user interference (MUI) with a total sum-power constraint at the transmitter, in the proposed scheme we consider MUI as a source of additional energy to increase the signal-to-interference-and-noise-ratio at the receiver. In our studies, we focus on two different CEP approaches: a first technique, where the power at each antenna is fixed to a specific value, and a two-step approach, where we first relax the power constraints to be lower than a defined parameter and then enforce CEP transmission. The algorithms are studied in terms of computational costs, with a detailed comparison between the proposed approach and the classical interference suppression schemes from the literature. Moreover, we analytically derive a robust optimization region to counteract the effects of channel-state estimation errors. The presented schemes are evaluated in terms of achievable symbol error rate in a perfect and imperfect channel-state information scenario for different modulation orders. Our results show that the proposed techniques further extend the benefits of classical CEP by judiciously relaxing the optimization region.
| Type: | Article |
|---|---|
| Title: | Constant envelope precoding by interference exploitation in phase shift keying-modulated multiuser transmission |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TWC.2016.2626279 |
| Publisher version: | http://dx.doi.org/10.1109/TWC.2016.2626279 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ |
| Keywords: | massive MIMO, Constant-envelope, multiuser |
| 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/1538820 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
