RFFI Protocols Using Antenna Mutual Coupling and Power Amplifier Nonlinear Memory Effects


Li, Yuepei ORCID: 0000-0002-4090-101X, Podilchak, Symon K ORCID: 0000-0001-6062-6732, Zhang, Junqing ORCID: 0000-0002-3502-2926, Cotton, Simon L ORCID: 0000-0003-2620-6501, Ratnarajah, Tharmalingam ORCID: 0000-0002-7636-1246 and Ding, Yuan ORCID: 0000-0002-5953-3800 (2025) RFFI Protocols Using Antenna Mutual Coupling and Power Amplifier Nonlinear Memory Effects. IEEE Communications Letters, 29 (6). pp. 1250-1254. ISSN 1089-7798, 1558-2558

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Abstract

This letter presents a radio frequency fingerprinting identification (RFFI) protocol in wireless links with multi-antenna array transmitters. Multi-antenna systems are widely used in wireless communication systems for diversity and/or multiplexing. The mutual coupling (MC) effects arising from electromagnetic interactions between adjacent array elements can influence the RF characteristics of the transmitter and eventually the performance of the established links. In this letter, a novel RFF strategy is proposed to expand the differences in the RFF characteristics among wireless devices from the same vendor, with the goal of massively improving RFF classification accuracy in low to medium signal-to-noise ratio (SNR) channel conditions. Experimental results show that when classifying six power amplifiers (PAs) from the same vendor, 21% to 62% average classification accuracy improvement can be achieved by enlarging the RFF feature differences arising from the PA nonlinearity arising from the array coupling.

Item Type: Article
Uncontrolled Keywords: 4613 Theory Of Computation, 46 Information and Computing Sciences, 4006 Communications Engineering, 40 Engineering
Divisions: Faculty of Science and Engineering
Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User: Symplectic Admin
Date Deposited: 07 Apr 2025 08:26
Last Modified: 30 Jun 2025 13:05
DOI: 10.1109/lcomm.2025.3558555
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3191225
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