On the Efficient Design of RIS-Assisted Secure MISO TransmissionShow others and affiliations
2022 (English)In: IEEE Wireless Communications Letters, ISSN 2162-2337, E-ISSN 2162-2345, Vol. 11, no 8, p. 1664-1668Article in journal (Refereed) Published
Abstract [en]
For the sake of improving the physical-layer security, reconfigurable intelligent surface (RIS) has been suggested to assist artificial noise (AN) to bridge both their advantages in multiple-input single-output (MISO) systems. Specifically, for achieving the trade-off between the reliability and security of transmission, the phase shifts (PSs) and beamforming are jointly designed based on the oblique manifold (OM) algorithm (Wang et al., 2020) without eavesdropper's channel state information (CSI). In order to alleviate the computational complexity, a novel alternating direction (AD) algorithm is proposed in this contribution. Specifically, the initial problem is transformed into several subproblems, each of which determines a specific RIS unit via a closed-form solution when the other configurations are fixed. Furthermore, the AD algorithm is investigated to exhibit the low-complexity advantage in contrast to OM. Simulation results illustrate that AD can converge faster and more stably compared to OM with the same performance.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2022. Vol. 11, no 8, p. 1664-1668
Keywords [en]
Array signal processing, MISO communication, Closed-form solutions, Computational complexity, Wireless communication, Security, Manifolds, Reconfigurable intelligent surface (RIS), multiple-input single-output (MISO), alternating direction (AD), artificial noise (AN), bit-error rate (BER)
National Category
Signal Processing Telecommunications Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-316929DOI: 10.1109/LWC.2022.3171043ISI: 000838680900025Scopus ID: 2-s2.0-85129362401OAI: oai:DiVA.org:kth-316929DiVA, id: diva2:1693615
Note
QC 20220907
2022-09-072022-09-072022-09-07Bibliographically approved