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Tunable Load MIMO with Quantized Loads

Li, A; Masouros, C; Sellathurai, M; Papadias, CB; (2017) Tunable Load MIMO with Quantized Loads. In: 2017 25th European Signal Processing Conference (EUSIPCO). (pp. pp. 1699-1703). IEEE Green open access

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(A. Li, C. Masouros, M. Sellathurai, and C. B. Papadias 2017 EUSIPCO) Tunable load MIMO with quantized loads.pdf - Accepted version

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Abstract

In this paper, we study the application of precoding schemes on practical electronically steerable parasitic array radiators (ESPARs), where quantized load impedances are considered for each antenna element. The presence of quantization in the loads results in a performance loss for practical ESPARs. To alleviate the performance loss, we propose to approximate the ideal current vector with convex optimization, where it is further shown that the optimality is achieved by optimizing the feeding voltages only. Specifically, we obtain the closed-form expression when single-fed ESPARs are assumed. Numerical results show that the proposed quantization-robust scheme can achieve a significant performance gain over ESPARs with quantized loads.

Type: Proceedings paper
Title: Tunable Load MIMO with Quantized Loads
Event: 25th European Signal Processing Conference (EUSIPCO) 28 Aug.-2 Sept. 2017, Kos, Greece
Location: GREECE
Dates: 28 August 2017 - 02 September 2017
ISBN-13: 978-0-9928626-7-1
Open access status: An open access version is available from UCL Discovery
DOI: 10.23919/EUSIPCO.2017.8081499
Publisher version: https://doi.org/10.23919/EUSIPCO.2017.8081499
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, ESPARs, quantization, optimization
UCL classification: 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/10058937
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