Distributed jamming for secure communication in poisson fields of legitimate nodes and eavesdroppers

This paper investigates studies how cooperative jamming helps improve the secrecy throughput of large decentralized networks where the locations and channel state information (CSI) of eavesdroppers are both unknown. The spatial distributions of legitimate nodes(transmitter/receiver pairs and helping jammers) and eavesdroppers are modeled as Poisson point processes. The helping jammers, equipped with multiple antennas, broadcast artificial noise that confuses eavesdropper but zero-forcing to the legitimate receiver. A jamming protocol based on the RTS/CTS handshake of IEEE 802.11 standard is proposed for decentralized implementation. Closed-form and numerical results analyze the benefits of jamming on secure communications according to parameters such as the Tx/Rx/jammers/eavesdroppers densities and guard zone.