Title :
Cooperative Secret Communication with Artificial Noise in Symmetric Interference Channel
Author :
Zhu, Jingge ; Mo, Jianhua ; Tao, Meixia
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China
fDate :
10/1/2010 12:00:00 AM
Abstract :
We consider the symmetric Gaussian interference channel where two users try to enhance their secrecy rates in a cooperative manner. Artificial noise is introduced along with useful information. We derive the power control and artificial noise parameter for two kinds of optimal points, max-min point and single user point. It is shown that there exists a critical value Pc of the power constraint, below which the max-min point is an optimal point on the secrecy rate region, and above which time-sharing between single user points achieves larger secrecy rate pairs. It is also shown that artificial noise can help to enlarge the secrecy rate region, in particular on the single user point.
Keywords :
Gaussian channels; minimax techniques; radiofrequency interference; telecommunication security; artificial noise; cooperative secret communication; max-min point; power control; single user point; symmetric Gaussian interference channel; Channel capacity; Equations; Interference channels; Noise; Power control; Receivers; Gaussian interference channel; power control; secrecy capacity;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.081910.101121