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Determination of Instantaneous Frequency By Continuous Wavelets Ridge  

Kim, Tae-Hyung (금오공과대학교 전자공학부)
Yoon, Dong-Han (금오공과대학교 전자공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.9, no.1, 2005 , pp. 8-15 More about this Journal
Abstract
The analysis of Rader signal that have non-linearity variable phase is signal that contact easily in several fields such as radar, telecommunication, seismic, sonar and biomedical applications. In generally, Non-stationary signal means that spectral characteristics are varying with time and instantaneous frequency is only one frequency or narrow range of frequencies varying as a function of time. Therefore, Instantaneous frequency is vary important variable that understanding physical characteristic of signal. This paper was describes continuous wavelet transform to determine instantaneous frequency at non-staionary signal and compare to existing method. When white noise or various frequency is overlapped each other in sign, existing method was can not decide corrected instantaneous frequency, but when used continuous wavelet transform, very well decide correctly frequency regardless of component of signal.
Keywords
Analytic Signal; Scalogram; Pasogram; Ridge;
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