A frequency measurement algorithm for non-stationary signals by using wavelet transform
Seong-Heon Seo, Dong Keun Oh · Review of Scientific Instruments · 2016
Scalogram is widely used to measure instantaneous frequencies of non-stationary signals. However, the basic property of the scalogram is observed only for stationary sinusoidal functions. A property of the scalogram for non-stationary signal is analytically derived in this paper. Based on the property, a new frequency measurement algorithm is proposed. In addition, a filter that can separate two similar frequency signals is developed based on the wavelet transform.