地面运动目标震动信号的时频滤波检测

The Time-frequency Filter Detection of the Seismic Signals from the Moving Target on the Ground

针对人员、车辆等地面目标运动时产生的地震动信号 ,通过典型时频分析方法STFT研究其时频分布特性 ,进而应用修改的复数卷积时变滤波方法进行信号检测 ,使信号信噪比得以提高 。

According to the seismic signals produced by moving targets such as the persons and vehicles moving on the ground, this paper studies their time frequency distribution characteristics by using the typicae time frequency analyzing method STFT so that modified complex convolution time varying filter method is used to do signal detection, thus improving the ratio of signal to noise. There fore, more valid feature vector can be extracted and used for target identification .