| 基于循环平稳的多天线感知无线电频谱检测 |
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| 引用本文： | 陈星,贺志强,吴伟陵.基于循环平稳的多天线感知无线电频谱检测[J].北京邮电大学学报,2008,31(2):85-89. |
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| 作者姓名： | 陈星 贺志强 吴伟陵 |
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| 作者单位： | 北京邮电大学,信息处理与智能技术重点实验室,北京,100876;北京邮电大学,信息处理与智能技术重点实验室,北京,100876;北京邮电大学,信息处理与智能技术重点实验室,北京,100876 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | 为了利用多天线的空间分集提高感知无线电频谱检测的性能，提出了基于循环平稳特性的多天线合并频谱检测方法。该方法从各天线接收信号的谱相关函数中提取信道频域响应的信息，在频域合并各天线的接收信号，然后对合并信号进行频谱检测。理论分析和仿真结果表明，该方法能充分利用多天线系统的空间分集提高频谱检测的性能。
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| 关 键 词： | 感知无线电 频谱检测 空间分集 循环平稳 |
| 文章编号： | 1007-5321(2008)02-0085-05 |
| 收稿时间： | 2007-7-16 |
| 修稿时间： | 2007年7月19日 |
Cyclostationarity-Based Spectrum Sensing Technique in Multi-Antenna Cognitive Radio |
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| CHEN Xing,HE Zhi-qiang,WU Wei-ling.Cyclostationarity-Based Spectrum Sensing Technique in Multi-Antenna Cognitive Radio[J].Journal of Beijing University of Posts and Telecommunications,2008,31(2):85-89. |
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| Authors: | CHEN Xing HE Zhi-qiang WU Wei-ling |
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| Affiliation: | Key Laboratory of Information Processing and Intelligent Technology,
Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | A multi-antenna spectrum sensing technique based on cyclostationary characters was proposed to improve the sensing performance in cognitive radio. After estimating the channel frequency response from the spectral correlation function (SCF) of each antenna, the new method combines the multiple antenna signals in frequency domain to detect the spectrum of combined signal. The closed-form expression for the signal noise ratio (SNR) of combined signal’s SCF and simulation results show that the technique is capable of achieving full spatial diversity in spectrum sensing. |
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| Keywords: | cognitive radio spectrum sensing spatial diversity cyclostationarity |
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