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研究了基于 Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布的宽带回波瞬时多普勒估计方法。利用时频分析特有的时、频特征分离的特点，通过信号Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布的时频相关，进行回波信号瞬时多普勒的估计，并通过理论证明其等价与传统的多普勒估计方法；在此基础上，本文提出了一种基于互 Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布峰值估计的瞬时多普勒估计方法。通过仿真研究，发现基于互 Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布峰值估计的方法具有更低的估计信噪比门限，大大降低了运算量，有利于工程实时应用。
The method of instantaneous Doppler estimation of broadband echo based on Wigner-Ville distribution is studied. The time-frequency correlation of the Wigner-Ville distribution of signals is used to estimate the instantaneous Doppler of the echo signals by using the characteristic of the time-frequency analysis, which separates the time and frequency features. The equivalence between Doppler and traditional Doppler estimation On this basis, an instantaneous Doppler estimation method based on peak estimation of mutual Wigner-Ville distribution is proposed. Through simulation research, we find that the method based on mutual peak Wigner-Ville distribution estimation has a lower threshold for signal-to-noise ratio estimation, greatly reducing the computational complexity and facilitating the real-time application of the project.