Self-adaptive digital filter for noise and phase jitter reductio

Details Self-adaptive digital filter for noise and phase jitter reductio Self-adaptive digital filter for noise and phase jitter reductio

1976-11-15

1978-08-08

Malzahn, David H.

Boots, shoes, and leggings

325477, G06F 1534

Patent

active

041061020

ABSTRACT:
A new adaptive digital tuning filter for tracking a sinusoidal signal within a frequency band is described. The input signal representative of both said sinusoidal signal and noise is fed to a Hilbert transformer which provides the in-phase and quadrature components, x.sub.k and x.sub.k, respectively, of said sinusoidal signal. These components are applied to the input of a filter having a transfer function K where ##EQU1## WHERE .phi. = 2.pi.FT, f is the tuned frequency of the filter,

REFERENCES:
patent: 3562675 (1971-02-01), Urell
patent: 3760167 (1973-09-01), Schrimshaw
patent: 3889108 (1975-06-01), Cantrell
patent: 3908115 (1975-09-01), Waggener
patent: 4027250 (1977-05-01), Lang

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