| 摘要: |
| 在Chirp信号探测中 ,利用发射信号和反射信号之间的时频分布相似性 ,提出用小波包变换时频分布的二维相关算法 ,估计接收信号中各个反射信号分量的时间延迟。该方法具有很强的压制噪声的能力 ,能从 - 5dB的接收信号中很准确地进行Chirp信号检测和时延估计 |
| 关键词: 信号检测,小波包,时频分布二维相关,时延估计,Chirp信号 |
| DOI：10.3969/j.issn.1001-893X. |
| 修订日期：2002-11-28 |
| 基金项目:国家自然科学基金资助项目 (40 2 0 4 0 12，4 9674 2 32 ) |
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| The Application of Wavelet Packet in the Chirp Signal Detection and Time Delay Estimation |
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| Abstract: |
| In the Chirp-signal exploration, utilizing the comparability between the time-frequency distributions of sent signal and reflected signals, the authors use wavelet-packet time-frequency distribution's two-dimensional correlation algorithm to estimate the time delays of the reflected signals in the received signal. The experiment of simulation shows that this algorithm can depress noise successfully and estimate the time delays accurately. |
| Key words: Signal detection,Wavelet packet,Time-frequency distribution's two-dimension correlation,Time-delay estimation,Chirp signal |
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