Sensing-assisted Physical Layer Security (Invited Paper)

Su，Nanchi1; Liu，Fan2; Masouros，Christos1

2023

WSA and SCC 2023 - 26th International ITG Workshop on Smart Antennas and 13th Conference on Systems, Communications, and Coding

386-391

Integrated Sensing and Communication (ISAC) is intuitively expected to enhance energy and spectrum efficiencies, while it is further promoted to get a deeper integration where the two functionalities are co-designed for mutual benefits. Concerning the communication data security risks resulting from the unification of these two operations, we address the sensingaided physical layer security (PLS) for ISAC systems in this paper. In our design, the ISAC base station (BS) sends information to communication users and detects targets simultaneously, where targets are reckoned as potential eavesdroppers (Eves). The BS firstly emits an omnidirectional waveform to search for potential Eves' angles adopting the combined Capon and approximate maximum likelihood (CAML) technique. We then formulate a weighted optimization problem for both the secrecy maximization and the Cramér-Rao bound (CRB) minimization, with the wide main beam design covering all possible directions of Eves. With the estimation accuracy improving iteratively, the secrecy rate benefits from the sensing functionality, that is, accordingly gets higher. Finally, the simulation results validate the effectiveness of the proposed method.

artificial noise Cramér-Rao Bound integrated sensing and communication systems physical layer security secrecy rate

Others

English

National Natural Science Foundation of China[62101234];National Natural Science Foundation of China[U20B2039];

2-s2.0-85166985381

Scopus

1.Department of Electronic and Electrical Engineering,University College London,London,United Kingdom
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,China

Su，Nanchi,Liu，Fan,Masouros，Christos. Sensing-assisted Physical Layer Security (Invited Paper)[C],2023:386-391.