| 合作分集授权系统性能研究 |
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| 引用本文： | 唐菁敏,龙华,刘增力,邵玉斌.合作分集授权系统性能研究[J].昆明理工大学学报(理工版),2012(3):31-34. |
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| 作者姓名： | 唐菁敏 龙华 刘增力 邵玉斌 |
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| 作者单位： | 昆明理工大学信息工程与自动化学院,云南昆明650500 |
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| 基金项目： | 云南省社会发展科技计划项目（2009CA027）; 云南省科技厅应用基础研究计划（2009ZC016X,2011FB035） |
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| 摘 要： | 认知无线电接入现有授权网络中会产生干扰,基于此提出了解码转发（DF）中继协作的方法,加入中继协助传输授权信号,从而改善认知用户的检测性能.由于DF性能很大程度上依赖于源-中继端信道传输特性,提出改进的选择解码转发（SDF）中继协作的方法.理论分析与仿真结果表明,中继的协作能提供合作分集,减少对授权网络的干扰.而SDF性能比DF的更为可靠.
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| 关 键 词： | 认知无线电 授权网络 解码转发 选择解码转发 中断概率 |
Performance Research on Cooperative Diversity of Licensed System |
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| TANG Jing-min,LONG Hua,LIU Zeng-li,SHAO Yu-bin.Performance Research on Cooperative Diversity of Licensed System[J].Journal of Kunming University of Science and Technology(Natural Science Edition),2012(3):31-34. |
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| Authors: | TANG Jing-min LONG Hua LIU Zeng-li SHAO Yu-bin |
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| Affiliation: | (Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China) |
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| Abstract: | Spectrum access of cognitive radio must interfere with licensed network. Thins paper presents Decode -and- forward（DF） protocol, which can improve detection performance of cognitive user by the cooperative transmission with relay. As DF protocol relies heavily on channel propagation characteristics of source - to - re- lay, a modified selective decode - and - forward （SDF） protocol is proposed. Theoretical analysis and simulation results show that the cooperation by relay can gain cooperative diversity and decrease interference to licensed net- work. Meanwhile, the SDF protocol can provide higher reliability than DF protocol. |
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| Keywords: | cognitive radio licensed network decode - and - forward selective decode - and - forward out- age probability |
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