This letter considers wireless-powered cooperative jamming to secure communication between a transmitter (Tx) and an information receiver, in the presence of an energy receiver (ER), which is termed a potential eavesdropper. The fullduplex jammer harvests energy from the Tx's information signal and transmits jamming signal at the same time, where the jamming signal not only confounds the ER (potential eavesdropper) but also charges the ER. Our goal is to maximize the secrecy information rate by jointly optimizing the power allocation at the Tx and jammer, while maintaining the harvested energy requirement of the ER. The studied problem is non-convex and we propose the optimal solution based on the Lagrange method. Simulation results show that the proposed scheme significantly outperforms the benchmark schemes. Index Terms-Physical layer security, simultaneous wireless information and power transfer (SWIPT), power allocation, cooperative jamming (CJ).
In the literature based on the idea of CJ, in REF , the authors studied the secrecy rate maximization problem by jointly optimizing the power of the transmitter and jammer while satisfying the harvesting energy requirement of the ER.
Power Allocation for Secure SWIPT Systems With Wireless-Powered Cooperative Jamming
IEEE Communications Letters
IEEE Communications Letters
Mathematics Computer Science