Method and apparatus for periodic noise suppression in...

Details Method and apparatus for periodic noise suppression in... Method and apparatus for periodic noise suppression in...

2007-11-15

2011-11-29

Malzahn, David H (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

08069197

ABSTRACT:
A system for cyclical noise removal from a transient signal is employed with a transient sensor for a signal. A signal conditioner is connected to the transient sensor for processing the signal. A transient digitizer captures the processed signal including capture of a sufficient period of time before the transient to accurately analyze the cyclic noise, capture of a period of time to be sure the transient is not effecting the ambient and capture of the period of the transient. A signal processor is employed for filtering of a non-cyclic transient signal. An embedded computer with associated software performs an analysis of the ambient background just prior to the time that the transient signal of interest is detected, performs an analysis of the signal of interest, extends the analyzed ambient background signal through the period of time during which the transient signal is occurring and subtracts the background from the transient signal.

REFERENCES:
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patent: 5966684 (1999-10-01), Richardson et al.
patent: 6026135 (2000-02-01), McFee et al.
patent: 6766854 (2004-07-01), Ciglenec et al.

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