Patent ID: 6366872
Filing Date: 2002-04-02
Classification: G01R

Abstract:
The method of establishing a processed data table of Lvalues derived from K(a) exciting impulse phenomena at a time proximate t0, (b) after a quiescent time t0+tq=tr, directing a signal through a phase resolving receiver and analog filter apparatus to pass the frequency content of oversampled phase resolved data therethrough in the form of a complex waveform, (c) sampling said complex waveform to ADC apparatus at an oversampling rate &ohgr;s to obtain first and subsequent samples, whereby each said sample experiences a delay in propagation through said receiver, analog filter and ADC apparatus, and whereby a list of said samples having ordinate values A1, A2, A3, . . . . A K at respective discrete abscissa values are established at uniform intervals of 1/&ohgr;s commencing at tr, (d) prepending to said list as many as p+q phase corrected pseudo datums at abscissa values âˆ’(p+q)/&ohgr;s with respect to tr, each said pseudo datum determined by a selected function corresponding to the complex conjugate of a respective actual datum, sampled at each of K actual datums commencing at tr, said phase corrected pseudo datum ordinate being the result of multiplication of said complex conjugate by a phase correction factor selected to exhibit continuity of phase corrected pseudo data with said actual datums, (e) passing said oversampled data including said pseudo datums through a digital filter.