1. Covert Backscatter Communication in the Presence of Multi-Antenna Eavesdropper
- Author
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Zhang, Yifan, Di Candia, Roberto, Yigitler, Huseyin, Jantti, Riku, and Yan, Zheng
- Abstract
Covert communication promises a secure transmission mechanism for Backscatter Communication (BC) by hiding the transmission behavior of backscatter devices from potential eavesdroppers. This letter investigates the upper limit of the covert rate in a scenario where a multi-antenna eavesdropper is present in BC setup, considering the inherent structural reflection of a backscatter tag. Specifically, the transceiver can employ a Gaussian signal to illuminate the tag, with special considering two distinct signals: a modulated signal and an additional reflected signal from the tag’s antenna structure. This letter considers a powerful eavesdropper who is equipped with a massive antenna to enhance its ability to detect the tag’s transmission activities. The results reveal the presence of the square root law (
$\Theta (\sqrt {n})$ - Published
- 2024
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