Secure Transmission via Jamming in Wireless Networks with Possion Spatially Distributed Eavesdroppers

In this paper, we propose a secure transmission scheme from a source to a destination in the presence of spatially random eavesdroppers, the distribution of which is modeled as a homogeneous Possion point process (PPP). In addition to transmitting the message signal, the source is allowed to use part of its power to transmit jamming signals in order to interfere the eavesdroppers. We assume the destination has the knowledge of the jamming signals. Based on the stochastic geometry and point process theory, we derive the closed-form expressions for the connection outage probability and the secrecy outage probability to characterize the reliability and the security performance, respectively. And we determine the optimal power allocation factor and wiretap code rates which maximize the secrecy throughput of the wiretap channel under secrecy outage probability constraint.