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    题名 作者 年代 出处 被引量
1认知无线电网络链路层关键技术的研究进展显示文摘构建认知无线电网络是解决频谱资源日趋紧张问题的根本途径。为实现无干扰的伺机频谱共享,认知无线电网络的链路层不仅需要提供传统的数据传输服务,还必须支持一套与频谱非均匀特性相适应的新功能。对这些新功能所需的关键技术进行了归纳,分别从协作感知、感知机制优化、动态频谱接入、动态频谱分配、跨层设计及安全机制等6个方面进行了探讨,重点对这些关键技术的最新研究进展进行了总结和分析,并讨论了下一步的主要研究方向。刘全 高俊 关建新 郭云玮 2010电讯技术2010,50,3:6
2运用模糊数学对计算机性能的评价朱恺力 2010经营管理者2010,,10X:1
3A MULTI-RESOLUTION SPECTRUM SENSING (MRSS) SCHEME UNDER MEASUREMENT-BASED CHANNEL MODELS IN COGNITIVE RADIO显示文摘Spectrum sensing is one of the key technologies in Cognitive Radios(CRs).Previous works are accomplished under simple channel models,which may lead to unreliable results when it applied to the over-the-air systems.In this paper,we investigate the performance of a Multi-Resolution Spectrum Sensing(MRSS) algorithm under measurement-based channel models in China.MRSS is a wavelet based algorithm which is suitable for non-stationary,wideband signal analysis.Using statistical mod-eling,measurement-based channel models are presented under typical urban and suburban scenarios in Shanghai,China.Then,the performance of the MRSS algorithm is evaluated under the measure-ment-based channel models.Simulation results show that,using MRSS,the performance is always better in the scenarios where Line-Of-Sight(LOS) path exist;also,in LOS scenarios,rich scattering effect helps to increase the performance.Gou Tianhang Sun Kun Li Yingzhe Li Pengpeng Wang Ping 2010Journal of Electronics(China)2010,27,5:0
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