7. Computer methods for processing signals and images

G.S. Khanyan
Central Institute of Aviation Motors, Russia

Determination of LFM-signal’s instantaneous frequency by phase-differential method of spectral analysis

A method for determining instantaneous frequency of LFM-signal (frequency-modulated harmonic oscillation with a linear time-varying frequency) is proposed. The method is based onphase relationships obtained by means of discrete Fourier transform of the signal’s limited-duration overlapping fragments. Numerical experiments on LFM-signal mathematical modeling and processing are performed to verify the method and determine the boundaries of its applicability.
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