IEEE Wireless Communications and Networking Conference

Wireless Physical-Layer Surveillance via Proactive Eavesdropping and Alternate Jamming

Li Sun, Yong Zhang, Arnold Lee Swindlehurst

Published Mar 29, 2021• 3 citations

Abstract

In this paper, we develop a wireless physical-layer surveillance scheme where two devices (M1and M2) work cooperatively to eavesdrop on and intervene in a suspicious transmission link from a source (S) to a destination (D). Unlike existing approaches which rely on the use of a multi-antenna fullduplex radio as the monitor, in our scheme, M1and M2are both single-antenna nodes operating in half-duplex mode. Within any odd time slot, M1sends a jamming signal to deteriorate the signal reception at D and M2eavesdrops on the transmission from S. During the next (even) slot, M1overhears the signal sent from S, and M2forwards its received signal during the previous slot to realize jamming. In this manner, the jamming signal received at M1can be perfectly removed after self-interference cancellation, and the signals from S during the two consecutive slots are jointly decoded with high reliability, thus enabling successful surveillance. On the other hand, the detection performance at D is heavily degraded due to the injection of the jamming signal, thereby preventing information leakage from S to D.

DOI: 10.1109/wcnc49053.2021.9417411

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