基于频谱感知结果的认知无线电用户分簇方法-电子与信息学报.pdf
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第 34 卷第 4 期 电 子 与 信 息 学 报 Vol.34No.4
2012 年 4 月 Journal of Electronics Information Technology Apr. 2012
基于频谱感知结果的认知无线电用户分簇方法
孙剑锋* 高锦春 刘元安 谢 刚
(北京邮电大学泛网无线通信教育部重点实验室 北京 100876)
摘 要:认知无线电用户的分簇由于不同位置频谱环境的巨大差异而成为亟待解决的问题之一。该文分析了认知无
线电用户频谱感知结果之间相关性,基于分析结论提出一种基于频谱感知结果相关性的分簇算法,并考察了频谱感
知结果量化对该算法的性能影响,得出增加频段数量的方式能够部分补偿量化带来的性能损失的结论。仿真显示,
该文的分簇算法能够有效地对认知无线电用户进行分簇,在频谱感知结果量化的条件下,也能达到较好的分簇性能。
从可靠性、准确性和自适应能力等方面,相较传统基于地理位置的分簇方法,该文所提出的分簇算法能综合考虑频
谱环境的特点,更加具实用价值。
关键词:认知无线电;频谱感知;分簇;相关性
中图分类号:TN929.5 文献标识码: A 文章编号:1009-5896(2012)04-0782-05
DOI: 10.3724/SP.J.1146.2011.00301
Clustering Method for Cognitive Radio User
Based on the Results of Spectrum Sensing
Sun Jian-feng Gao Jin-chun Liu Yuan-an Xie Gang
(Key Lab of Universal Wireless Communications, Ministry of Education,
Beijing University of Posts and Telecommunications, Beijing 100876, China)
Abstract: User clustering is one of the most important problems because of the difference of the frequency
spectrum utilization situation from cognitive users. This paper gives the analysis result of correlation between
cognitive radio users and also proposes the clustering algorithm based on this analysis. Considering the real
situation, the effects of data quantization are derived and the derivation shows the performance loss could be
compensated partly through the increase the number of spectrum bands. Finally, the simulation shows the proposal
could perform well whether the data quantization is adopted or not. From the aspect of reliability, accuracy and
adaptability, the proposed algorithm, which gives a comprehensive consideration of the s
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