Receiver Detection Employing Semaphore in Cognitive Radio  

作　　者：Wang Weidong Li Fan Zhang Yinghai Wang Shoufeng Wang Yongtao 

机构地区：[1]Beijing Jiaotong Univ, Natl Engn Lab Next Generat Internet Interconnect, Beijing 100044, Peoples R China

出　　处：《China Communications》2010年第1期41-49,共9页中国通信（英文版）

基　　金：supported by the National High Technology Research and Development Program of China ("863" Program, No.2009AA01Z242);National Natural Science Foundation of China (60972080)

摘　　要：Interference from secondary users to primary users should be avoided in cognitive radio. However, it is difficult to solve the interference problem if the secondary users cannot get the information of the primary receivers. Insufficient information of primary users would result in inaccurate spectrum detecting result. To deliver the information of primary users, Receiver Detection Employing Semaphore (ReDES) is proposed in this paper. Primary receiver informs secondary users of its licensed receive frequency according to semaphore architecture directly in ReDES. The semaphore is used to determine the spectrum holes by secondary users. Frequency mapping method is come up with as a realization of ReDES. The procedure and the detailed techniques are illustrated to make ReDES scheme reasonable and feasible. Simulation results show that the proposed scheme can effectively detect the frequencies of primary receivers, and improve the accuracy of spectrum detection.Interference from secondary users to primary users should be avoided in cognitive radio. However, it is difficult to solve the interference problem if the secondary users cannot get the information of the primary receivers. Insufficient information of primary users would result in inaccurate spectrum detecting result. To deliver the information of primary users, Receiver Detection Employing Semaphore (ReDES) is proposed in this paper. Primary receiver informs secondary users of its licensed receive frequency according to semaphore architecture directly in ReDES. The semaphore is used to determine the spectrum holes by secondary users. Frequency mapping method is come up with as a realization of ReDES. The procedure and the detailed techniques are illustrated to make ReDES scheme reasonable and feasible. Simulation results show that the proposed scheme can effectively detect the frequencies of primary receivers, and improve the accuracy of spectrum detection.

关 键 词：COGNITIVE RADIO RECEIVER detection hidden TERMINAL problem. 

分 类 号：TN[电子电信]