| 基于用户协作的频谱感知方案及检测概率分析 |
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| 引用本文： | 邹玉龙,郑宝玉,崔景伍,朱佳.基于用户协作的频谱感知方案及检测概率分析[J].解放军理工大学学报,2008,9(6):656-662. |
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| 作者姓名： | 邹玉龙 郑宝玉 崔景伍 朱佳 |
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| 作者单位： | 南京邮电大学信号处理与传输研究院,江苏南京210003 |
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| 基金项目： | 江苏省自然科学基金重点资助项目
，
江苏省高校自然科学重大基础研究项目
，
江苏省博士研究生科研创新计划
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| 摘 要： | 通过认知用户间的彼此协作,可以使得认知无线网络获得明显的空间分集增益,从而显著改善认知无线电系统的感知性能。由此,提出了2种基于放大重传和解码重传的协作频谱感知方案,并且在瑞利衰落环境下对所提方案的检测概率性能进行了理论分析,给出了非协作感知和协作感知的检测概率的解析表达式。根据理论推导得到的检测概率解析式,对3种频谱感知方案进行了数值仿真实验。结果表明：在虚警概率一定的情况下,协作感知方案的检测概率明显大于非协作方案,这也说明了用户协作为认知无线网络带来了可观的性能增益。
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| 关 键 词： | 认知无线电 协作频谱感知 协作分集 检测概率 |
Detection probability analysis of spectrum sensing through user cooperation |
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| ZOU Yu-long,ZHENG Bao-yu,CUI Jing-wu and ZHU Jia.Detection probability analysis of spectrum sensing through user cooperation[J].Journal of PLA University of Science and Technology(Natural Science Edition),2008,9(6):656-662. |
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| Authors: | ZOU Yu-long ZHENG Bao-yu CUI Jing-wu and ZHU Jia |
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| Institution: | Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecom.,Nanjing 210003,China;Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecom.,Nanjing 210003,China;Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecom.,Nanjing 210003,China;Institute of Signal Processing and Transmission,Nanjing University of Posts and Telecom.,Nanjing 210003,China |
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| Abstract: | Two nov el co operat ive spect rum sensing schemes based o n AF ( Amplify and Forw ard) and DF
( Deco de and Forw ard) protocols w er e pro posed to achieve spat ial diver sity g ains in cog nit ive radio netw
orks, w hich w ere referred to as AF-CSS ( AF-based Cooperat ive Spect rum Sensing ) and DF-CSS ( DFbased
Cooperat ive Spect rum Sensing ) respect ively. Analy t ical ex pr essions of detectio n pr obability for cooperat
ive and non-cooperative spect rum sensing w er e g iven. AF-CSS and DF-CSS schemes w ere derived in
Ray leig h fading channels to show the ef fect of user co operat ion on the detection performance. Besides, numerical
exper iment s w ere conducted to v er ify the effect iveness of the proposed coo perat iv e schemes. T he
increase of detect ion probability by user cooperation for cog nit ive radio netwo rks, confirms the advantag es
of both AF-CSS and DF-CSS schemes . |
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| Keywords: | cognit ive radio cooperat ive spect rum sensing coo perat iv e diversity detect ion probability |
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