| 4,136 | 171 | 99 |
| 下载次数 | 被引频次 | 阅读次数 |
认知无线电是指具有自主寻找和使用空闲频谱资源能力的智能无线电技术。认知无线电技术的提出,为解决不断增长的无线通信应用需求与日益紧张的无线频谱资源之间的矛盾提供了一种有效的解决途径。当前,认知无线电技术从理论到实践都面临很多困难。文章简述了认知无线电的基本原理,对认知无线电涉及的射频、频谱感知和数据传输等物理层核心关键技术进行了总结分析,并结合当前的发展状况对该技术未来的发展趋势进行了预测。
Abstract：Cognitive Radio (CR) is an intelligent radio technology which has the capability to search and utilize underutilized spectrum resources. CR has been recognized as an effective solution to the dilemma introduced by the rapid growth of wireless communications and the scarcity of spectrum resources. However, from theory to practical applications, there are many challenges faced by CR currently. In this paper, the key physical layer techniques of CR, such as radio frequency front-end, spectrum sensing and data transmission, are discussed. According to the status of the research, the development tendency of this technology is also predicted.
[1]MitolaⅢJ.Cognitive radio for flexible mobile multimedia communications[J].Journal Mobile Networks and Applications,2001,6(5):435-441.
[2]MitolaⅢJ,MAGUIRE G Q Jr.Cognitive radio:Making software radios more personal[J].IEEE Personal Communications,1999,6(4):13-18.
[3]MitolaⅢJ.Cognitive radio[D].Stockholms,Swedrn:Royal Institute of Technology(KTH),2000.
[4]Notice of proposed rule making and order[R].FCC Et Docket no.03-322,2003.
[5]HAYKIN S.Cognitive radio:Brain-empowered wireless communications[J].IEEE Journal on Selected Areas in Communications,2005,23(2):201-220.
[6]AKYILDIZ I F,LEE W Y,VURAN M C,et al.Next generation/dynamic spectrum access/cognitive radio wireless networks:A survey[J].Commputer Networks,2006,50(13):2127-2159.
[7]WEISS T A,JONDRAL F K.Spectrum pooling:an innovative strategy for the enhancement of spectrum efficiency[J].IEEE Communications Magazine,2004,42(3):S8-S14.
[8]CABRIC D,O’DONNELL I D,CHEN M S,et al.Spectrum sharing radios[J].IEEE Circuit and Systems Magazine,2006,6(2):30-45.
[9]Jondral T A.Software-defined radio-basic and evolution to cognitive radio[J].Eurasip Journal on Wireless Communications and Networking,2005(3):275-283.
[10]DEVROYE D,MITRAN P,TAROKH V.Limits on communications in a cognitive radio channel[J].IEEE Communications Magazine,2006,44(6):44-49.
[11]IEEE P1900TM/D01.Draft standard definitions and concepts for spectrum management and advanced radio system technologies[S].2007(v0.28).
基本信息:
DOI：
中图分类号:TN014
引用信息:
[1]王军,李少谦.认知无线电:原理、技术与发展趋势[J].中兴通讯技术,2007,No.73(03):1-4.
基金信息:
国家自然科学基金项目(60572090,60496313,60472045,60602009)