Secrecy Outage Probability of SWIPT-OFDMA Schemes with Transmit Antenna Selection

Abstract

This study examines the wireless communications secrecy performance of multi-user (MU) simultaneous wireless information and power transfer (SWIPT) scheme employing transmit antenna selection (TAS) and maximal-ratio combining (MRC). In order to address the user scheduling requirement of MU-SWIPT scheme, orthogonal frequency-division multiple access (OFDMA) has been utilized, and the secrecy outage probability (SOP) performance is examined via simulations. In the study, it is aimed to examine a realistic scenario where eavesdropper might detect the sub-carrier indices of the legitimate users. In addition, the variation of the SOP performance has been revealed for different values of the number of legitimate users, the number of eavesdropper antennas, the power division factor related to the SWIPT process and the noise variance introduced by the information decoder.