Secrecy precoding in MIMOME wireless communication system under partial CSI. Issue 13 (1st August 2020)

• Record Type: Journal Article
• Authors: Dong, Runze; Wang, Buhong; Cao, Kunrui; Li, Xia
• Is Part Of: IET communications. Volume 14:Issue 13(2020)
• Page Start: 2202
• Page End: 2209
• Publication Date: 2020-08-01
• Subjects: MIMO communication -- antenna arrays -- optimisation -- singular value decomposition -- precoding -- radio transmitters -- wireless channels -- telecommunication security; secrecy precoding -- MIMOME wireless communication system -- partial CSI -- precoding scheme -- partial channel state information -- precoding matrix -- information bearing signal -- SVDNS‐based scheme -- impairing -- wiretap channel -- optimal power allocation -- secrecy rate maximise problem -- secrecy performance -- singular value decomposition and null space based scheme -- multiple‐input multiple‐output multiantenna eavesdropper system; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2019.1257
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : In this study, a precoding scheme which is called singular value decomposition and null space (SVDNS) based scheme is proposed to enhance physical layer security of a multiple‐input multiple‐output multiantenna eavesdropper (MIMOME) system. Under the partial channel state information (CSI) of the eavesdropper, the precoding matrix for the information bearing signal is constructed firstly via SVDNS‐based scheme to acquire a compromise between improving performance of the main channel and impairing that of the wiretap channel. Then the optimal power allocation over subchannels formed by precoding matrix is obtained through solving the secrecy rate maximise problem to further improve secrecy performance. After that, under the scenario that CSI of the wiretap channel is less knowable, precoding matrix for artificial noise (AN) is proposed via SVDNS‐based scheme, and then the optimal power allocation between the information bearing signal and AN is obtained while optimal power allocation over subchannels is solved subsequently. Simulation results show that the SVDNS‐based scheme with optimal power allocation achieves a higher secrecy rate than the existing schemes, and the SVDNS‐based scheme with AN aiding could make up for the performance degradation of it without AN in the situation that CSI of the wiretap channel is more unknowable.