| 基于多相滤波器的宽带射电频谱仪设计 |
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| 引用本文： | 陈林杰,颜毅华,刘飞,王威.基于多相滤波器的宽带射电频谱仪设计[J].天文研究与技术,2010,7(2). |
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| 作者姓名： | 陈林杰 颜毅华 刘飞 王威 |
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| 作者单位： | 陈林杰,CHEN Lin-jie(中国科学院国家天文台,北京,100012;中国科学院研究生院,北京,100049);颜毅华,刘飞,王威,YAN Yi-hua,LIU Fei,WANG Wei(中国科学院国家天文台,北京,100012) |
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| 基金项目： | 国家自然科学基金，科技部科研项目 |
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| 摘 要： | 提出了一种基于多相滤波器的新型宽带射电频谱仪的设计方案。通过多相滤波器实现宽带射电信号的滤波,对滤波后的基带信号进行数字功率检波,再通过积分控制,最终得到射电信号的频谱强度。仿真分析表明,这一设计具有很好的效果,通过多相滤波器,使信号的速率大为降低,克服了传统频谱仪以及采用FFT实现频谱变换方法的缺点,可以实现对超宽带射电信号的实时频谱分析。
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| 关 键 词： | 多相滤波 频谱仪 快速傅里叶变换(FFT) |
Design of a Wideband Spectrum Analyzer Based on Polyphase Filters |
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| CHEN Lin-jie,YAN Yi-hua,LIU Fei,WANG Wei.Design of a Wideband Spectrum Analyzer Based on Polyphase Filters[J].Astronomical Research & Technology,2010,7(2). |
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| Authors: | CHEN Lin-jie YAN Yi-hua LIU Fei WANG Wei |
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| Institution: | CHEN Lin-jie1,2,YAN Yi-hua1,LIU Fei1,WANG Wei1(1.National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China,2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | In this paper,we propose a design of a new wideband spectrum analyzer based on polyphase filters.An input wideband radio signal is processed successively by polyphase filters and a power detector,then the output is integrated under a controlled time to finally yield the measurements of the spectral intensities.Simulations show that this design is rather effective.With polyphase filters the data processing amount decreases greatly,which allows overcoming the disadvantages of a traditional method and achievin... |
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| Keywords: | Polyphase filtering Spectrum analyzer FFT |
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