偏度与峰度在脉冲激光回波分析中的应用研究

将波形序列做平移处理,并结合其坐标信息可以计算波形的偏度与峰度,两者分别反映了波形的对称性和尖峭程度。在脉冲激光探测中,偏度和峰度可以用于对回波信号的特征分析,目标表面的反射率变化和起伏通常不会引起回波波形偏度和峰度的较大变化,只有当目标表面反射率或起伏出现突变时回波的偏度和峰度才会呈现出较大的值,而且不同突变情况下的回波的两参数的值也是不同的,这为脉冲激光探测的回波特征分析提供了重要依据。

Study on the application of skewness and kurtosis in pulse laser echo analysis

After translation,the skewness and kurtosis of a pulse waveform can be calculated combined with its new coordinate,which respectively reflect the symmetry and the Gaussianity of the waveform. In the pulse laser detection system,skewness and kurtosis can be used for the feature analysis of the echo signal. The change of the reflectivity and the fluctuate of the target surface will not lead to a large change of the skewness and kurtosis of the echo signal,while the saltation of the reflectivity and the fluctuate will cause a large skewness or kurtosis value,and the value of the two parameters are different under different saltation conditions. This provides an important basis for the feature analysis of the echo signal in pulse laser detection system.