| 摘要: |
| 针对差分跳频信号频带宽、跳速快、检测难的问题,在分析比较短时傅里叶变换(STFT)的基础之上,提出一种通过提取小波脊进行时频分析和参数估计的信号检测方法。该方法的检测效果明显优于短时傅里叶变换,当信噪比大于-7 dB时,在不要求高采样率的情况下,对于差分跳频信号的参数估计是有效的。 |
| 关键词: 差分跳频,信号检测,小波变换,短时傅里叶变换,参数估计 |
| DOI：10.3969/j.issn.1001-893X. |
| 修订日期：2007-08-11 |
| 基金项目: |
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| A Differential Frequency Hopping(DFH) Signal Detection Method Based on Wavelet Transform and Time-frequency Analysis |
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| Abstract: |
| In view of the problem of wide frequency band,high hopping speed and hard detection of differential frequency hopping(DFH) signal,a detection method based on time-frequency analysis and parameters estimation by extracting wavelet ridge is presented through comparing and analyzing the detection method using short time Fourier transform(STFT).Detection and parameters estimation performance of this method obviously outperforms that of the method using STFT.If over-sampled rate is not required,the method is robust when the SNR is larger than-7dB. |
| Key words: DFH(differential frequency hopping),signal detection,wavelet transform,STFT,parameter estimation |
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