IRS-Assisted covert communication with a BPP distributed warden outside a safety zone

Document Type

Conference Proceeding

Publication Title

2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Seoul, Korea, Republic of

First Page

12831

Last Page

12835

Publisher

IEEE

School

School of Science

RAS ID

70475

Funders

National Natural Science Foundation of China

Grant Number

62071234

Comments

Z. Chen, S. Yan, X. Zhou, F. Shu, J. Sun and D. W. Kwan Ng, "IRS-Assisted Covert Communication with a BPP Distributed Warden outside a Safety Zone," ICASSP 2024 - 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Seoul, Korea, Republic of, 2024, pp. 12831-12835, https://doi.org/10.1109/ICASSP48485.2024.10447139

Abstract

In this work, we consider an intelligent reflecting surface (IRS)-assisted covert wireless communication system, in which the location of a warden Willie follows a binomial point process (BPP) distribution within a disk centered at O with a radius of R and the warden is outside a safety zone centered at C with a radius of r. The location of the safety zone can be anywhere (inside, outside, or having intersections) relative to the disk. We first analyze the detection performance of Willie for the cases with known channel state information (CSI) and unknown CSI, respectively, based on which we determine Willie's minimum detection error rate. Then, considering the geometric randomness of Willie's position inside the disk but outside the safety zone, the average minimum detection error rate is determined and adopted in the covertness constraint in the subsequent covert system design. Our examination first shows that the covert communication rate generally increases with R. However, more interestingly, whether the covert communication rate increases or decreases with r generally depends on the relative locations of the disk, the safety zone, and Alice. For example, when both the safety zone and Alice are on the same side of the disk center O, the covert rate increases with r, and vice versa.

DOI

10.1109/ICASSP48485.2024.10447139

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