Artificial noise aided secure communication and its eavesdropping method
Yang Pen · Journal of Chongqing University of Posts and Telecommunications · 2014
The broadcast nature of wireless network leads to significant challenges to its information security. Recently,artificial noise(AN) is proposed to be injected into the wiretap channel to interfere the eavesdropper for secret communication at the physical-layer. In this paper,we investigate the necessary condition for this AN-aided scheme to ensure communication security,and further propose an effective wiretap algorithm to counteract such a security scheme. When the eavesdropper equips more antennas than the transmitter,it is able to cancel artificial interference and extract the secret information by complex-valued independent component analysis(ICA). Numerical simulation results verify that our proposed algorithm can defeat the AN-aided security scheme and implement eavesdropping effectively.