ADAPTIVE MICROPHONICS NOISE CANCELLATION
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United States of America Patent
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Issued Date -
May 20, 2021
app pub date -
Nov 19, 2020
filing date -
Dec 18, 2018
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
Systems and methods are provided for compensating for mechanical acceleration at a reference oscillator. A reference oscillator provides an oscillator output signal and an accelerometer on a same platform as the reference oscillator, such that mechanical acceleration at the reference oscillator is detected at the accelerometer to produce a measured acceleration. A filter assembly, having an associated set of filter weights, receives the measured acceleration from the accelerometer and provides a tuning control signal responsive to the measured acceleration to a frequency reference associated with the system. An adaptive weighting component receives the oscillator output signal of the reference oscillator and an external signal that is provided from a source external to the platform and adjusts the set of filter weights for the filter assembly based on a comparison of the external signal and the oscillator output signal.
First Claim
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