NASA NTRS · 19700000325
A self-tuning filter
Abstract
Self-tuning filter automatically adjusts its center frequency to track signal frequency. This permits the use of a filter with a bandwidth smaller than the range of input signal frequencies.
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Deboo, G. J., Hedlund, R. C.. 1970-07-01. A self-tuning filter. https://ntrs.nasa.gov/citations/19700000325
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