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Near-optimal Interference Exploitation 1-bit Massive Mimo Precoding via Partial Branch-and-bound

Li, A; Liu, F; Masouros, C; Li, Y; Vucetic, B; (2020) Near-optimal Interference Exploitation 1-bit Massive Mimo Precoding via Partial Branch-and-bound. In: ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). (pp. pp. 8941-8945). IEEE: Barcelona, Spain. Green open access

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Abstract

In this paper, we focus on 1-bit precoding for large-scale antenna systems in the downlink based on the concept of constructive interference (CI). By formulating the optimization problem that aims to maximize the CI effect subject to the 1-bit constraint on the transmit signals, we mathematically prove that, when relaxing the 1-bit constraint, the majority of the obtained transmit signals already satisfy the 1-bit constraint. Based on this important observation, we propose a 1-bit precoding method via a partial branch-and-bound (P-BB) approach, where the BB procedure is only performed for the entries that do not comply with the 1-bit constraint. The proposed P-BB enables the use of the BB framework in large-scale antenna scenarios, which was not applicable due to its prohibitive complexity. Numerical results demonstrate a near-optimal error rate performance for the proposed 1-bit precoding algorithm.

Type: Proceedings paper
Title: Near-optimal Interference Exploitation 1-bit Massive Mimo Precoding via Partial Branch-and-bound
Event: ICASSP 2020
Location: Barcelona
Dates: 04 May 2020 - 08 May 2020
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ICASSP40776.2020.9053948
Publisher version: https://doi.org/10.1109/ICASSP40776.2020.9053948
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
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/10091436
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