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On the Error Probability of Interference Exploitation Precoding with Power Allocation

Salem, A; Masouros, C; (2020) On the Error Probability of Interference Exploitation Precoding with Power Allocation. In: Proceedings of the 2020 IEEE Wireless Communications and Networking Conference (WCNC). IEEE: Seoul, South Korea. Green open access

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Abstract

In this paper, we analyze the performance of constructive interference (CI) precoding in downlink multi-user multiple-input single-output (MU-MISO) systems with phase-shift-keying (PSK) signals. A new closed-form expression is derived for the moment generating function (MGF) of the received signal-to-noise-ratio (SNR). Then, the MGF is used to calculate the average symbol error probability (SEP) for the CI technique. In light of this, new exact analytical expression and very accurate asymptotic expression for the average SEP are presented. Based on the new SEP expressions, a power allocation scheme to minimize the sum SEPs (Min-Sum) is investigated, and analytical expression of the power allocation factors is derived. The numerical results show that, the CI precoding yields superior performance over conventional interference suppression precoding techniques in terms of SEP. Furthermore, the Min-Sum power allocation scheme provides additional up to 10dB gains in the transmit SNR compared to equal power allocation technique.

Type: Proceedings paper
Title: On the Error Probability of Interference Exploitation Precoding with Power Allocation
Event: 2020 IEEE Wireless Communications and Networking Conference (WCNC)
Location: ELECTR NETWORK
Dates: 25 May 2020 - 28 May 2020
ISBN-13: 978-1-7281-3106-1
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/WCNC45663.2020.9120670
Publisher version: https://doi.org/10.1109/WCNC45663.2020.9120670
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: Interference exploitation, multiple users MIMO, PSK
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/10112121
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