Device for computing the pseudo-variance of the instantaneous pe

Details Device for computing the pseudo-variance of the instantaneous pe Device for computing the pseudo-variance of the instantaneous pe

1981-12-08

1984-06-05

Malzahn, David H.

Boots, shoes, and leggings

364570, 364715, 364554, 367135, G01S 1500

Patent

active

044532237

ABSTRACT:
The device for computing the pseudo-variance ##EQU1## of the N instantaneous periods P.sub.i of an alternating-current signal S.sub.e and especially for detecting a signal in the presence of noise comprises means for detecting the sign of the difference P.sub.i+1 -P.sub.i, means for adding the quantity 2(P.sub.i+1 -P.sub.i) to the quantity ##EQU2## (with 1.ltoreq.j.ltoreq.i and P.sub.j+1 -P.sub.j) when P.sub.i+1 is greater than P.sub.i, and means for subtracting the value P.sub.N from the value ##EQU3## (with P.sub.i+1 >P.sub.i), the pseudo-variance to be determined being provided by the subtraction means.

REFERENCES:
patent: 3562649 (1971-01-01), Hoffman
patent: 3714654 (1973-01-01), Wicks et al.
patent: 3723951 (1973-02-01), Kush et al.
patent: 3925650 (1975-12-01), Brown
patent: 4165459 (1979-08-01), Curtice
patent: 4176337 (1979-11-01), Aechter et al.

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