基于载波检测的认知无线电方案设计与实现  

Design and implementation of cognitive radio based on carrier detection

作　　者：赵雄鹰[1] 汪一鸣[1] 

机构地区：[1]苏州大学电子信息学院,江苏苏州215021

出　　处：《微型机与应用》2010年第10期53-55,59,共4页Microcomputer & Its Applications

基　　金：国家自然科学基金(60872003);苏州市2009年科技发展项目(SYJG0925)

摘　　要：针对目前认知无线电概念较少付诸实施的实际情况,对认知无线网络中非授权用户接入频谱空隙的具体方法进行研究,提出一种基于载波检测的设计方案。该设计硬件上由单片机和射频发射模块组成。软件上通过基于载波检测的程序设计来实现非授权用户的智能接入。经测试,所设计的接入算法使得非授权用户能够准确检测和访问处于空闲状态的频点,并在这个频点上成功进行数据的发送与接收。而当授权用户使用该授权频段时,非授权用户又能够及时退出,寻找新的频点。从而初步实现了同构网络中非授权用户的智能接入,完成了一个可使用的认知用户通信系统。Based on the present situation that cognitive radio is less used in practice and to exploit unused spectrum more effi- ciently in dynamically changing environments, an intelligent access spectrum hole method for cognitive users based on carrier detec- tion is proposed in this paper. This system is designed by microprocessors and transceiver modules in hardware. And in software, the user is designed to link to the spectrum hole intelligently by programming on carrier detection. During the testing, we find that our system can make the cognitive user access the spectrum hole successfully, moreover, send and receive data correctly. Mean- while, the cognitive user will quit the spectrum in time and look for a new one while the spectrum is reused by the authority user. The testing shows that this design basically achieves the purpose of co-existing with individual homogeneous network users and car- ries out a cognitive radio communication system which can be actually used.

关 键 词：认知无线电 频谱空隙 载波检测 智能接入 

分 类 号：TN014[电子电信—物理电子学]