Optimization of sensing time and cooperative user allocation for OR-rule cooperative spectrum sensing in cognitive radio network

作     者：刘鑫 仲伟志 陈琨奇 LIU Xin;ZHONG Wei-zhi;CHEN Kun-qi

作者机构：College of Astronautics Nanjing University of Aeronautics and Astronautics 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2015年第22卷第7期

页      面：2646-2654页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Project(61471194)supported by the National Natural Science Foundation of China Project(BK20140828)supported by the Natural Science Foundation of Jiangsu Province,China Project supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education,China 

主　　题：cognitive radio energy detection cooperative spectrum sensing throughput optimization 

摘      要：In order to improve the throughput of cognitive radio(CR), optimization of sensing time and cooperative user allocation for OR-rule cooperative spectrum sensing was investigated in a CR network that includes multiple users and one fusion center. The frame structure of cooperative spectrum sensing was divided into multiple transmission time slots and one sensing time slot consisting of local energy detection and cooperative overhead. An optimization problem was formulated to maximize the throughput of CR network, subject to the constraints of both false alarm probability and detection probability. A joint optimization algorithm of sensing time and number of users was proposed to solve this optimization problem with low time complexity. An allocation algorithm of cooperative users was proposed to preferentially allocate the users to the channels with high utilization probability. The simulation results show that the significant improvement on the throughput can be achieved through the proposed joint optimization and allocation algorithms.