Impact of Interference on Secrecy Capacity in a Cognitive Radio Network

Authors

Zhihui Shu, University of Nebraska at OmahaFollow
Yaoqing Lamar Yang, University of Nebraska-LincolnFollow
Yi Qian, University of Nebraska-LincolnFollow
Rose Qingyang Hu, Utah State UniversityFollow

Date of this Version

2011

Citation

IEEE Global Telecommunications Conference (GLOBECOM 2011), 2011; doi: 10.1109/GLOCOM.2011.6133652

Comments

Copyright 2011 IEEE

Abstract

In this paper, we investigate secrecy capacity of a cognitive radio network based on stochastic geometry distributions. We consider the Poisson process of both the secondary users and the eavesdroppers, and analyze how the stochastic interference from the secondary users can influence the secrecy capacity of the primary users. First, we describe a network model with primary users, secondary users and eavesdroppers in a cognitive radio communication network environment, and derive the expression of secrecy capacity in an additive white Gaussian noise channel. Then, we study the outage probability of secrecy capacity of a primary node from a secure communication graph point of view. Furthermore, we present numerical results of the cumulative distribution function (c.d.f.) of the secrecy capacity between a primary transmitter and a primary receiver. Our analysis brings the insights on secure communications in terms of spatially Poisson distributions of primary users, secondary users and eavesdroppers.