Title :
Instantaneous bandwidth for signals and spectrogram
Author :
Cohen, Leon ; Lee, Chongmoon
Author_Institution :
Hunter Coll., City Univ., of New York, NY, USA
Abstract :
The concept of instantaneous bandwidth, which is an indication of the frequency spread at a given time, is developed. It is shown that the global bandwidth of a signal can naturally be broken up into an AM and an FM contribution and that the AM contribution comes from averaging the instantaneous bandwidth. The instantaneous bandwidth for the spectrogram is derived, and series expansions in terms of the derivatives of the phase are obtained
Keywords :
amplitude modulation; frequency modulation; signal processing; spectral analysis; AM contribution; FM contribution; global bandwidth; instantaneous bandwidth; series expansions; signals; spectrogram; Bandwidth; Density functional theory; Educational institutions; Fourier transforms; Frequency; Frequency measurement; Phase measurement; Spectrogram; Time measurement;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.116086
