| 超宽带信号的时频分析 |
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| 引用本文： | 赵立昕,蔡志坚,周正. 超宽带信号的时频分析[J]. 高技术通讯, 2006, 16(2): 133-135 |
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| 作者姓名： | 赵立昕 蔡志坚 周正 |
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| 作者单位： | 北京邮电大学96号信箱无线网络实验室,北京,100876;北京邮电大学96号信箱无线网络实验室,北京,100876;北京邮电大学96号信箱无线网络实验室,北京,100876 |
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| 基金项目： | 国家科技攻关项目 , 中国科学院资助项目 , 重庆市应用基础研究基金 |
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| 摘 要： | 超宽带(UWB)信号的特性更多表现为非平稳信号的特性,而对非平稳信号采用时频域的变换更能描述信号频谱的分布情况.首先引入了一种基于布莱克曼窗的短时傅立叶变换,然后给出两种典型的UWB信号,利用这种时频分析方法对两种UWB信号进行了时频分析.分析结果表明,无论是PAM-DS-UWB信号还是OFDM-UWB信号都符合FCC对UWB信号的功率限制.
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| 关 键 词： | 超宽带 短时傅立叶变换 时频分析 |
| 收稿时间： | 2004-12-03 |
| 修稿时间： | 2004-12-03 |
The time-frequency analysis on Ultra-WideBand signal |
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| Zhao Lixin,Cai Zhijian,Zhou Zheng. The time-frequency analysis on Ultra-WideBand signal[J]. High Technology Letters, 2006, 16(2): 133-135 |
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| Authors: | Zhao Lixin Cai Zhijian Zhou Zheng |
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| Affiliation: | Wireless Network Lab, Beijing University of Posts and Telecommunications, Beijing 100876 |
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| Abstract: | The characteristic of Ultra-WideBand(UWB) signal shows more characteristic about unsteady signal. The time-frequency transform can show the spectrum distributing about unsteady signal. This paper introduces a short time Fourier Transform (STFT) windowed by BlackMan window firstly. Then two classic UWB signals are introduced. The BlackMan windowed STFT is used to analyze the UWB signal in this paper. The simulation shows that both PAM-DS-UWB and OFDM-UWB signals can satisfy the PSD mask of FCC. |
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| Keywords: | ultra-wide band (UWB) short time fourier transform (STFT) time-frequency analysis |
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