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Optimal Closed-Form Designs for Directional Modulation with Practical Hardware Limitations

Wei, Z; Masouros, C; Liu, F; Xu, T; (2020) Optimal Closed-Form Designs for Directional Modulation with Practical Hardware Limitations. In: Proceedings of the GLOBECOM 2020 - 2020 IEEE Global Communications Conference. (pp. pp. 1-6). The Institute of Electrical and Electronics Engineers (IEEE) Green open access

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Abstract

In this paper, directional modulation (DM) is investigated to enhance physical layer security. Practical transmitter designs are exploited under imperfect channel state information (CSI) and hardware limitations, such as finite-resolution phase shifters (PSs) at transmitter. Considering the most common scenario where eavesdroppers (Eves)' information is completely unknown, we exploit the DM design to optimize legitimate users (LUs)' receiving performance while randomizing the Eves' received signal. Explicitly, tailored for the practical hardware limitations and imperfect CSI in realizing DM, we design optimal precoders in closed-form with Lagrangian and Karush-Kuhn-Tucker conditions, enhancing the practicality of the symbol-level based DM. Simulation demonstrates that the algorithm achieves lower symbol error rate (SER) at the LUs while deteriorating the Eves' SER, leading to an improved secrecy rate over the benchmarks.

Type: Proceedings paper
Title: Optimal Closed-Form Designs for Directional Modulation with Practical Hardware Limitations
Event: GLOBECOM 2020 - 2020 IEEE Global Communications Conference
ISBN-13: 978-1-7281-8298-8
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/GLOBECOM42002.2020.9348065
Publisher version: https://doi.org/10.1109/GLOBECOM42002.2020.9348065
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: Directional modulation, Physical layer security, Hardware impairments, Imperfect channel estimation, Interference exploitation, Closed-form design
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/10124087
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