eprintid: 10185502
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/18/55/02
datestamp: 2024-01-16 10:05:28
lastmod: 2024-01-16 10:05:28
status_changed: 2024-01-16 10:05:28
type: proceedings_section
metadata_visibility: show
sword_depositor: 699
creators_name: Li, A
creators_name: Shen, C
creators_name: Liao, X
creators_name: Masouros, C
creators_name: Swindlehurst, AL
title: Block-Level Interference Exploitation Precoding without Symbol-by-Symbol Optimization
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
keywords: MIMO, symbol-level precoding, constructive
interference, interference exploitation, optimization
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
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.
date: 2023-05-12
date_type: published
publisher: IEEE
official_url: http://dx.doi.org/10.1109/wcnc55385.2023.10118875
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2028870
doi: 10.1109/WCNC55385.2023.10118875
isbn_13: 9781665491228
lyricists_name: Masouros, Christos
lyricists_id: CMASO14
actors_name: Masouros, Christos
actors_id: CMASO14
actors_role: owner
full_text_status: public
pres_type: paper
series: IEEE Wireless Communications and Networking Conference
publication: IEEE Wireless Communications and Networking Conference, WCNC
volume: 2023-M
place_of_pub: Glasgow, United Kingdom
pages: 6
event_title: 2023 IEEE Wireless Communications and Networking Conference (WCNC)
event_location: Glasgow, SCOTLAND
event_dates: 26 Mar 2023 - 29 Mar 2023
issn: 1525-3511
book_title: 2023 IEEE Wireless Communications and Networking Conference (WCNC)
citation:        Li, A;    Shen, C;    Liao, X;    Masouros, C;    Swindlehurst, AL;      (2023)    Block-Level Interference Exploitation Precoding without Symbol-by-Symbol Optimization.                     In:  2023 IEEE Wireless Communications and Networking Conference (WCNC).    IEEE: Glasgow, United Kingdom.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10185502/1/2203.12502.pdf