Colone, F;
Filippini, F;
Seglio, MD;
Brennan, PV;
Du, R;
Han, TX;
(2023)
Reference-free Amplitude-based WiFi Passive Sensing.
IEEE Transactions on Aerospace and Electronic Systems
, 59
(5)
pp. 6432-6451.
10.1109/TAES.2023.3276738.
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Abstract
The parasitic exploitation of WiFi signals for passive sensing purposes is a topic that is attracting considerable interest in the scientific community. In an attempt at meeting the requirements for sensor compactness, easy deployment, and low cost, we resort to a non-coherent signal processing scheme that does not rely on the availability of a reference signal and relaxes the constraints on the sensor hardware implementation. Specifically, with the proposed strategy, the presence of a moving target echo is determined by detecting the amplitude modulation that it produces on the direct signal transmitted from the WiFi access point. We investigate the target discrimination capability of the resulting sensor against the competing interference background and we theoretically characterize the impact of undesired amplitude fluctuations in the received signal that are determined by causes other than the superposition of the target echo, thereby including the waveform properties. Hence, we propose different solutions to address the limitations identified, characterized by different complexities, and we investigate their advantages and drawbacks. The conceived signal processing schemes are thoroughly validated on both simulated and experimental data, collected in different operational scenarios.
| Type: | Article |
|---|---|
| Title: | Reference-free Amplitude-based WiFi Passive Sensing |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TAES.2023.3276738 |
| Publisher version: | https://doi.org/10.1109/TAES.2023.3276738 |
| Language: | English |
| Additional information: | © 2023 IEEE. This work is licensed under a Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL 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/10174867 |
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