Instantaneous Frequency Estimation Using Osculating Circle Method
There are many methods able to extract the instantaneous frequencies from a time series for practical applications. Gabors method is one of the most popular and simple methods; it calculates the instantaneous phase and amplitude of a signal by using its analytic signal. Gabors method first uses Hilbert Transform to make the time series analytical. Then, the instantaneous frequencies are calculated by taking the derivative of unwrapped phase. The limitation of Gabors method is that it can only be applied to time series with mono component and near zero mean. For wide band time series, Gabors method may produce negative frequencies. In this paper, a new method, the Osculating Circle (OC) Method, is presented. The OC method is based on Gabors method but with modified unwrapped phase calculation. This new method can provides accurate instantaneous frequency (IF) and instantaneous amplitude (IA) calculation for most of the cases.
Hilbert Transform instantaneous frequency instantaneous amplitude unwrapped phase componen
Ming-Kuang J. C, Sheu
Technology and Science Institute of Northern Taiwan Taiwan, Taipei Wells Fargo Bank San Francisco, CA, USA
国际会议
2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)
上海
英文
2392-2396
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）