Li, Ang;
Shen, Chao;
Liao, Xuewen;
Masouros, Christos;
Swindlehurst, A Lee;
(2022)
Block-Level Interference Exploitation Precoding without Symbol-by-Symbol Optimization.
arXiv
10.48550/arXiv.2203.12502.
Preview |
Text
2203.12502v1.pdf - Other Download (508kB) | Preview |
Abstract
Symbol-level precoding (SLP) based on the concept of constructive interference (CI) is shown to be superior to traditional block-level precoding (BLP), however at the cost of a symbol-by-symbol optimization during the precoding design. In this paper, we propose a CI-based block-level precoding (CI-BLP) scheme for the downlink transmission of a multi-user multiple-input single-output (MU-MISO) communication system, where we design a constant precoding matrix to a block of symbol slots to exploit CI for each symbol slot simultaneously. A single optimization problem is formulated to maximize the minimum CI effect over the entire block, thus reducing the computational cost of traditional SLP as the optimization problem only needs to be solved once per block. By leveraging the Karush-Kuhn-Tucker (KKT) conditions and the dual problem formulation, the original optimization problem is finally shown to be equivalent to a quadratic programming (QP) over a simplex. Numerical results validate our derivations and exhibit superior performance for the proposed CI-BLP scheme over traditional BLP and SLP methods, thanks to the relaxed block-level power constraint.
| Type: | Article |
|---|---|
| Title: | Block-Level Interference Exploitation Precoding without Symbol-by-Symbol Optimization |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.48550/arXiv.2203.12502 |
| Publisher version: | http://doi.org/10.48550/arXiv.2203.12502 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | MIMO, symbol-level precoding, constructive interference, interference exploitation, optimization |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10146145 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
