A method of extracting transient features of a non-stationary signal was proposed based on the combination of orthogonal empirical mode decomposition (OEMD) and the Hilbert transform. After obtaining orthogonal intrinsic mode functions, the instantaneous frequency and amplitude can be calculated, so problems existing in the original Hilbert-Huang Transform（HHT）method, such as mode aliasing, can be solved. The track irregularity signal is studied with the OEMD method, and the statistical and analytic result indicates that there are relatively serious short wave and long wave
No takes yet. Share an insight, caveat, or question.
Zhao et al. (2016) studied this question.