Performance analysis of cognitive radio networks with interference cancellation

Abstract

This paper investigates the performance of cognitive radio network (CogNet). An interference cancellation scheme employed at secondary transmitter is first discussed based on the cancellation of cross interference from secondary transmitter to primary receiver. Then, we derive the expressions of the probability density function (PDF) and cumulative distribution function (CDF) of the received SNRs of both primary receiver and secondary receiver, and provide the closed-form overall outage probability expression of the system, which shows that the overall performance of the CogNet is improved with interference cancellation performed at the secondary transmitter. The numerical results finally verify the accuracy of our analysis.