Modeling and analysis of Cognitive Radio with multiple primary/Secondary users and imperfect sensing

Abstract

In Cognitive Radio network, the Secondary Users (SU) makes use of the spectrum of licensed primary user when they are unoccupied. Here we have studied and expressed the normalized throughput for both single secondary user and multiple secondary users coexisting under cooperative sensing technique. We have also incorporated the consequences due to imperfect sensing and analyzed the throughput under multiple primary users. The general frame structure of SU consists of slots for both sensing and data transmission. The accuracy of cooperative sensing depends on the sensing time and the number of participating SUs in the network. We have also analyzed various cooperative sensing schemes and have proposed optimal K-of-N rule as the efficient one and thus enhanced the throughput.