This work proposes a novel joint design for multiuser multiple-input multiple-output wiretap channels. The base station exploits a switching network to connect a subset of its antennas to the available radio frequency chains. The switching network and transmit beamformers are jointly designed to maximize the weighted secrecy sum-rate for this setting. The principal design problem reduces to an NP-hard mixed-integer non-linear programming. We invoke the fractional programming technique and the penalty dual decomposition method to develop a tractable iterative algorithm that effectively approximates the optimal design. Our numerical investigations validate the effectiveness of the proposed algorithm and its superior performance compared with the benchmark.
@article{arxiv.2302.11127,
title = {Secure Antenna Selection and Beamforming in MIMO Systems},
author = {Zhenqiao Cheng and Nanxi Li and Ruizhe Long and Jianchi Zhu and Chongjun Ouyang and Peng Chen},
journal= {arXiv preprint arXiv:2302.11127},
year = {2024}
}
Comments
6 pages. arXiv admin note: substantial text overlap with arXiv:2212.13684