This paper develops a new cooperative jamming protocol, termed accumulate-and-jam
(AnJ), to improve physical layer security in wireless communications. Specifically, a full-
duplex (FD) friendly jammer is deployed to secure the direct communication between source
and destination in the presence of a passive eavesdropper. We consider the friendly jammer
as an energy-constrained node without embedded power supply but with an energy
harvesting unit and rechargeable energy storage; it can thus harvest energy from the radio …

This paper explores the use of a full-duplex (FD) friendly jammer to secure the
communication between a transmitter and a receiver in the presence of a passive
eavesdropper. The friendly jammer is considered as a wireless-powered node without
embedded power supply but can harvest energy from radio frequency (RF) signals,
accumulate it in the storage, and use the harvested energy to perform the cooperative
jamming (CJ). A novel CJ protocol termed accumulate-and-jam (AnJ) is proposed to improve …