Research on Secrecy Communication via Bilateral Artificial Noise Transmitting

The problem that we consider is the secrecy communication in bilateral transmitting scenario. The model is connected via wireless signal between two points: the transmitter and the receiver. We assume that the transmitter has a single transmit antenna while the receiver has two (one transmit, one receive). In recent papers, it is shown that artificial noise could be used to increase the secrecy capacity. However, for one transmitter antenna case, helper nodes can only be used. In this paper we propose a new 2-Stage artificial noise sending method to substitute helper nodes. So the cost of helper nodes can be saved. The comparison of artificial noise transmitting with Beamforming is given in this paper. It can be proved to increase the secrecy capacity via our approach.