Multi-slots Wideband Cooperative Spectrum Sensing Based on Weighed Data Fusion in Cognitive Radio  

作　　者：Xin Liu Xiu-Hua Li Rong-Fei Fan Xue-Zhi Tan 

机构地区：[1]Communication Research Centre,Harbin Institute of Technology [2]School of Electrical and Electronic Engineering,Nanyang Technological University [3]Dept. of Electrical and Computer Engineering,University of Alberta

出　　处：《Journal of Harbin Institute of Technology(New Series)》2013年第1期1-7,共7页哈尔滨工业大学学报（英文版）

基　　金：Sponored by the National Natural Science Foundation of China ( Grant No. 61071104);the Fundamental Research Funds for the Central Universities( Grant No. HIT. NSRIF. 201149)

摘　　要：In order to avoid the interference to the primary user(PU), in this paper Cognitive Radio (CR) periodically senses the presence of PU, and during one period, CR can sense all the sub-channels based on weighed data fusion and then use all the idle channels decided by the coordinator. The local sensing time of CR is divided into multi-slots in which CR can sense any sub-channel. Through reasonably allocating the sensing slots and users by mathematic optimization, the proposed algorithm can improve the total throughput of CR. The optimization problem of the proposed scheme which seeks to maximize the throughput subject to the constraint of the detected performance of each sub-channel is proposed in order to choose the optimum local sense time and the number of the cooperative CRs. The simulation results indicate that the proposed scheme can obtain higher throughput than the conventional single-channel sense, and there are the optimum local sense time and the number of cooperative CRs to make the throughput reach maximum.In order to avoid the interference to the primary user（PU）, in this paper Cognitive Radio （CR） periodically senses the presence of PU, and during one period, CR can sense all the sub-channels based on weighed data fusion and then use all the idle channels decided by the coordinator. The local sensing time of CR is divided into multi-slots in which CR can sense any sub-channel. Through reasonably allocating the sensing slots and users by mathematic optimization, the proposed algorithm can improve the total throughput of CR. The optimization problem of the proposed scheme which seeks to maximize the throughput subject to the constraint of the detected performance of each sub-channel is proposed in order to choose the optimum local sense time and the number of the cooperative CRs. The simulation results indicate that the proposed scheme can obtain higher throughput than the conventional single-channel sense, and there are the optimum local sense time and the number of cooperative CRs to make the throughput reach maximum.

关 键 词：cognitive radio energy detection cooperative detection weighed data fusion thoughput 

分 类 号：TN911.23[电子电信—通信与信息系统]