Precoding Method of Cancelling Asynchronous Interference for Cognitive Radio System
Peixin Qu · 2013
When the primary users and second user geographically has certain distance,there are asynchronous interferen-ces.The interferences not only influence the primary user system,also can affect second user system.In order to eliminate the influence of asynchronous interference on primary and secondary users systems,this paper put forward a kind of precoding based on the minimum mean square error.Analysis and simulation results show that the proposed scheme in the main user system interference limited conditions,effectively enhances the user's system and second user system capacity,and improves the reliability of the transmission system of second users system.