Abstract
Unauthorized access to data has been a recognized risk of wireless systems for many decades. While security solutions in communications engineering have typically revolved around cryptography in the higher layers, a semi-recent development is the elevating interest into security in the physical layer, namely by utilizing jamming for protection. In this paper, we present an experimental study into a full-duplex jammer–receiver (i.e., “jamceiver”) that is able to simultaneously interfere with the same radio resources it is actively receiving from. The radio architecture is loosely based on frequency-modulated continuous-wave radars that are constant-envelope radio transceivers, which benefit from simple-but-efficient self-interference suppression in the analog baseband domain by using a passive highpass filter. Its limitation to constant-envelope transmission is not an issue for efficient jamming waveforms unlike it would be with conventional direct-conversion transceivers in full-duplex communications. To show the performance limits of a practical jamceiver, we present comprehensive measurement results from a laboratory environment as well as a jamming case study from an open park area with actual Wi-Fi signals. Especially, the experiments validate the feasibility of preventing eavesdropping with continuous low-power jamming in a large area around a full-duplex jamceiver that acts as an access point for simultaneously offering decent Wi-Fi service to an off-the-shelf laptop.
Original language | English |
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Pages (from-to) | 2937-2950 |
Journal | IEEE Journal on Selected Areas in Communications |
Volume | 41 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2023 |
Publication type | A1 Journal article-refereed |
Keywords
- Band-pass filters
- eavesdropping
- Filtering theory
- Full-duplex system
- in-band full-duplex radio
- Interference cancellation
- jamming
- Jamming
- Physical-layer security
- Portable computers
- Security
- self-interference
Publication forum classification
- Publication forum level 2
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering