Low noise to signal evaluation

Details Low noise to signal evaluation Low noise to signal evaluation

2006-04-25

2006-04-25

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C702S106000, C702S197000, C375S350000, C708S300000

Reexamination Certificate

active

07035776

ABSTRACT:
The invention provides for improved signal to noise ratios in evaluation techniques. This is done by acquiring a signal, processing it to obtain a complex form thereof, obtaining a filtering factor from the complex form and processing the acquired signal with the filtering factor. The signal may be areturned ultrasonic, radar or sonar signal which may be reflected from a suitably sharp pulse. In particular, the invention may he used to evaluate articles to detect defects therein. In a preferred form, the complex form is filtered with a number of complex filters and the phases of the complex filtered signals determined. These phases are then used to provide the filtering factor.

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