Hardware implementation of adaptive filtering using charge-coupled devices. [For perimeter security sensors]
Sandia Laboratories' Digital Systems Division/1734, as part of its work on the Base and Installation Security Systems (BISS) program has been making use of adaptive digital filters to improve the signal-to-noise ratio of perimeter sensor signals. In particular, the Widrow-Hoff least-mean-squares algorithm has been used extensively. This non-recursive linear predictor has been successful in extracting aperiodic signals from periodic noise. The adaptive filter generates a predictor signal which is subtracted from the input signal to produce an error signal. The value of this error is fed back to the filter to improve the quality of the next prediction. Implementation of the Widrow adaptive filter using a Charge-Coupled Device tapped analog delay line, analog voltage multipliers and operational amplifiers is described. The resulting filter adapts to signals with frequency components as high as several megahertz.
- Research Organization:
- Sandia Labs., Albuquerque, N.Mex. (USA)
- DOE Contract Number:
- EY-76-C-04-0789
- OSTI ID:
- 5042789
- Report Number(s):
- SAND-77-1859C; CONF-771206-7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
ALGORITHMS
AMPLIFIERS
CHARGE-COUPLED DEVICES
DELAY CIRCUITS
DESIGN
DIGITAL FILTERS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
MATHEMATICAL LOGIC
NATIONAL ORGANIZATIONS
NOISE
OPERATIONAL AMPLIFIERS
PHYSICAL PROTECTION DEVICES
SANDIA LABORATORIES
SECURITY
SEMICONDUCTOR DEVICES
US AEC
US ERDA
US ORGANIZATIONS