彭玉华, 刘亚询, 王玉平, et al. The Application of Wavelet Transform to Time-Frequency Analysis of Transient Electromagnetic Backscatter Signals[J]. Acta Electronica Sinica, 1995, (9).
彭玉华, 刘亚询, 王玉平, et al. The Application of Wavelet Transform to Time-Frequency Analysis of Transient Electromagnetic Backscatter Signals[J]. Acta Electronica Sinica, 1995, (9).DOI:
The Morlet wavelet analysis is applied to analyze the time-frequency properties of electromanetic backscattered signals from targets. To improve the time and frequency resolution
we construct a related wavelet with instantaneous frequency that increases linearly with time
and make the scale increase properly. Compared with the conventional short-time Fourier transform and Wigner-Ville distribution
the numerical results show that the wavelet time-frequency analysis provides high time resolution in the early-time high frequency resolution in the late-time