| 快变信道下基于数据平滑的DVB-T信号频谱感知 |
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| 引用本文： | 吴玲玲.快变信道下基于数据平滑的DVB-T信号频谱感知[J].现代电子技术,2012,35(9):62-64,72. |
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| 作者姓名： | 吴玲玲 |
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| 作者单位： | 中南民族大学,湖北武汉,430074 |
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| 摘 要： | 为能够检测出快变信道中低信噪比下的电视空白信号,同时考虑到噪声对信号的影响,在对信号进行互相关前对接收信号进行平均以提高检测器的检测性能。结果表明,基于数据平滑的感知算法比时域互相关感知算法的检测性能提高了约8dB,比时域自相关感知算法提高了约13dB。
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| 关 键 词： | 认知无线电 DVB-T 电视空白 数据平滑 |
Spectrum sensing of DVB-T signals based on data smoothing under fast varying channels |
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| WU Ling-ling.Spectrum sensing of DVB-T signals based on data smoothing under fast varying channels[J].Modern Electronic Technique,2012,35(9):62-64,72. |
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| Authors: | WU Ling-ling |
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| Affiliation: | WU Ling-ling(South-Central University for nationalities,Wuhan 430074,China) |
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| Abstract: | In order to detect television white space(TVWS) under fast varying channel and low SNR,and take account the influence of noise on the signals,the received signals before correlation operation were averaged in order to improve the performance of the detector.The results show that the performance of the data smoothing algorithm is higher than the time-domain symbol cross-correlation algorithm by about 8dB and higher than the time-domain symbol auto-correlation algorithm by about 13 dB. |
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| Keywords: | cognitive radio DVB-T TVWS data smoothing |
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