Inventors:
David G. Bellemore - Fairfield CT
David R. Fournier - Hudson MA
Michael A. Davis - Glastonbury CT
Assignee:
CiDRA Corporation - Wallingford CT
International Classification:
G06F 700
Abstract:
A method and corresponding apparatus for determining the centroid (V ) of a waveform signal being sampled at a set of parameter values (V , i=1,. . . , n) yielding a corresponding set of sampled amplitudes (A , i=1,. . . , n), each parameter value and corresponding amplitude forming a sampled point (V , A ), the method including the steps of: selecting an amplitude at which to create an interpolated point; interpolating a first parameter value corresponding to the amplitude selected in the step of selecting an amplitude; and performing a centroid calculation using only the sampled points with an amplitude greater than a predetermined threshold. The waveform is sometimes sampled in the presence of background noise, and the method sometimes also includes: estimating the background (B ) for each value in the set of parameter values at which sampling is performed; and reducing the amplitude (A ) of each sampled amplitude by the background (B ) so estimated.