Device for computing the pseudo-variance of the...

Details Device for computing the pseudo-variance of the... Device for computing the pseudo-variance of the...

G - Physics

06

G

354/137

G06G 7/14 (2006.01) G01S 7/292 (2006.01) G06F 7/62 (2006.01) G06F 17/18 (2006.01) G06G 7/62 (2006.01)

Patent

CA 1180124

A DEVICE FOR COMPUTING THE PSEUDO-VARIANCE OF THE INSTANTANEOUS PERIODS OF AN ALTERNATING-CURRENT SIGNAL Abstract of the Disclosure The device for computing the pseudo-variance Image (Pi+1 - P1) of the N instantaneous periods Pi of an alternating-current signal Se and especially for detecting a signal in the presence of noise comprises means for detecting the sign of the difference Pi+1 - Pi, means for adding the quantity 2(Pi+1 - Pi) to the quantity P1 + 2 Image (Pj+l - Pj) (with 1 ? j ? i and Pj+l - Pj) when Pi+l is greater than Pi, and means for subtracting the value PN from the value P1 + 2 Image (Pi+1 - Pi) (with Pi+1 > Pi), the pseudo-variance to be determined being provided by the subtraction means. -1-

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