基于广义S变换的透射槽波埃里相识别

陈波, 朱国维, 武延辉, 杨振强, 周俊杰

Research on identifying the airy phase of transmitted channel waves based on generalized S-transform

CHEN Bo, ZHU Guo-Wei, WU Yan-Hui, YANG Zhen-Qiang, ZHOU Jun-Jie

图2 频率阶梯变化的非平稳信号的S变换和广义S变换(A=0.4239,B=0.471)对比分析 a—频率阶梯变化的非平稳信号;b—图2a的S变换结果;c—图2a的广义S变换结果;d—图2b、图2c虚线处的线谱;e—50 Hz时的S变换和广义S变换窗函数振幅随时间变化;f—S变换和广义S变换窗函数时间半高宽对比

Fig.2 Comparison of S-transform and generalized S-transform (A=0.4239,B=0.471) for non-stationary signal with frequency step change a—non-stationary signal with frequency step change;b—S-transform results of Fig. 2a;c—generalized S-transform results of Fig. 2a;d—line spectra at dotted lines in Fig. 2b and Fig. 2c;e—S-transform and generalized S-transform window amplitude versus time at 50 Hz;f—comparison of the temporal FWHM between S-transform and generalized S-transform