Research on cooperative detection and multiple access for cognitive radio system  

作　　者：Anna Auguste Anghuwo 刘鑫 谭学治 

机构地区：[1]Communication Research Center,Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2011年第6期86-92,共7页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.6107110)

摘　　要：As cognitive radio (CR) needs to detect spectrum accurately and utilize the idle spectrum efficiently,a new model of CR is proposed.This model adopts energy detection with auto-adapted threshold and produces spectrum mark vector.The basis function is obtained through making IDFT to the inner product of spectrum and phase vectors,and it is variable with the spectrum states.Data are sent through modulation on the basis function,and it can be estimated by correlation in the receiving end.The cooperative detection and multiple access of this model are also researched in this paper,and the performance is finally analyzed.Simulations show the cooperative detection of this model can obtain higher detection probability,and the disaccord of the basis functions between sending and receiving ends can lower its performance.As cognitive radio （CR） needs to detect spectrum accurately and utilize the idle spectrum efficiently, a new model of CR is proposed. This model adopts energy detection with auto-adapted threshold and pro- duces spectrum mark vector. The basis function is obtained through making IDFT to the inner product of spectrum and phase vectors, and it is variable with the spectrum states. Data are sent through modulation on the basis function, and it can be estimated by correlation in the receiving end. The cooperative detection and multiple access of this model are also researched in this paper, and the performance is finally analyzed. Simulations show the cooperative detection of this model can obtain higher detection probability, and the disaccord of the basis functions between sending and receiving ends can lower its performance.

关 键 词：cognitive radio energy detection basis function 

分 类 号：TN914.3[电子电信—通信与信息系统]