Apparatus for and method of, analysing signals

Details Apparatus for and method of, analysing signals Apparatus for and method of, analysing signals

G - Physics

01

R

354/138, 354/46

G01R 23/16 (2006.01) G06F 15/332 (1985.01)

Patent

CA 1228673

INVENTOR: LAI-WAN M. SZETO TITLE: APPARATUS FOR, AND METHOD OF, ANALYSING SIGNALS ABSTRACT OF THE DISCLOSURE An apparatus for, and method of, analysing a signal takes the Fourier Transform of both an original signal and a shifted signal, which has previously been subjected to a shift, for example a time shift, relative to the original signal. This gives sets of first and second frequency components corresponding respectively to the original signal and the shifted signal. The arguments of at least one pair of corresponding first and second frequency components are calculated, and subtracted to give a phase difference. From this phase difference, the frequency of the corresponding constituent of the original signal can be determined. Further, having obtained the frequency, one can calculate the initial phase and amplitude of the corresponding constituent of the original signal. The signal can vary temporally or spatially.

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