针对垂直地震剖面（Vertical Seismic Profile, VSP)波场的方向特性和时频特性，主要指上、下行波在方向上具有差异性，纵波、转换横波等具有不同的时频特性，申请书提出基于广义同步挤压方向时频的VSP最优滤波研究。该研究中，将广义同步挤压技术引入方向波Directionlet的时频表示，得到一种高分辨率方向时频滤波方法。Directionlet具有强方向表征能力，能够对各个方向信息进行极为稀疏的表示，而广义同步挤压变换可通过广义解调来消除时移产生的模糊，并通过对Directionlet分解所得的时间—尺度系数谱沿频率方向进行挤压重排，使时频分辨率全面提高，使时频曲线更精细易于辨识，从而更有利于VSP中波的分离提取，同时也对背景噪声进行了有力压制。不断优化滤波过程使滤波性能得到充分发挥，直至实现广义同步挤压方向时频对VSP的最优滤波并建立其方法体系。

For the characteristics in direction and time-frequency of vertical seismic profile (VSP) field, that mainly refers to the direction difference between upward wave and downward wave and the different time-frequency characteristic among P-wave and P-S wave et al. This application proposes a directional time-frequency based on generalized synchrosqueezing transform which is applied to the optimal filtering research of VSP. In this research, it brings the generalized synchrosqueezing technology into the time-frequency representation of Directionlet, thereby obtains a high resolution directional time-frequency filtering method. Directionlet possesses strong ability in direction representing and shows extremely sparse representation for the information of all directions. The generalized synchrosqueezing transform comprehensively improves the resolution of time-frequency distribution through generalized demodulation that is eliminating the fuzzy caused by time-varying, and through squeezing and rearranging the spectrum of time-scale coefficients decomposed by Directionlet. Therefore, it could make the time-frequency curves more elaborate to be identified, and then it is more beneficial to the separation and extraction of each wave in VSP. Simultaneously, it suppresses the background noise when extracts the valid waves. Optimizing the filtering process continuously to make the filtering performance to be fully played, until it realizes the optimal filtering of VSP by the directional time-frequency based on generalized synchrosqueezing. At last, the whole method system will be established.