Secure Transmission in Multicarrier Time-Switching Wireless Powered Communication Networks with Full-duplex Receivers

Abstract

In this paper, we investigate physical layer security, where a source node communicates with a wireless powered full-duplex destination node using multiple subcarriers in the presence of an eavesdropper. The destination node adopts the time switching technique to coordinate information decoding and energy harvesting, and can use the harvested energy to send jamming signals to interfere with the eavesdropper. We investigate the problem of optimizing transmit power allocation at the source node, the transmit power allocation for jamming at the destination node and the time allocation for maximizing the secrecy rate, and propose an iterative algorithm to solve the optimization problem. It is shown by simulation results that the proposed algorithm greatly outperforms other reference algorithms.