Analysis and Simulation of the Transmission Radius of the Cognitive Network Primary User under Limited Throughput
认知网络主用户吞吐量受限下的传输半径分析与仿真

This paper concerns the concurrent communication interference problem that cognitive user conducts to primary user’s receiver under cognitive radio network. Adopted the Information theory viewpoint, it analyzes the interference power that cognitive user conducts to primary user’s receiver under the restrictive condition of a throughput threshold and communication outage probability for primary user. Moreover, it cites the Markov inequality to deduce out the domain of primary user’s transmission radius. Meanwhile, numerical analysis indicates that under certain conditions the correlation of the average throughput of primary user, the accessed number of cognitive user and primary user’s transmission radius is quantitatively mutual restriction. Eventually, this paper develops a network simulation platform for cognitive radio based on outage probability and analyzes the practical function relation between primary user’s throughput and transmission radius under different density of cognitive user, which validates the rationality and correctness of the model.