Automatic clutter elimination

Details Automatic clutter elimination Automatic clutter elimination

1993-01-26

1994-03-29

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367 7, 367 11, 367901, 36441325, 12866109, G03B 4206

Patent

active

052991741

ABSTRACT:
An apparatus and method for clutter elimination from signals which digitizes a signal to generate n samples of the signals. M basis functions (such as various levels of filters) are fit to the n samples. An i+1 basis function of the m basis functions is iteratively subtracted from each of the n samples, and the difference is stored in an i difference signal until the i+1 difference signal is less than a threshold. In various embodiments, the threshold may be an absolute noise floor (R.sub.O.sup.min) preset by a manufacturer or a user. In other embodiments, the threshold may be based upon an absolute or relative predictor error of the signal once the basis function (filter) has been removed. The i difference signal may be used for performing a frequency estimate of the signal.

REFERENCES:
patent: 3869601 (1975-03-01), Metcalf
patent: 5058593 (1991-10-01), Forestieri et al.
patent: 5228009 (1993-07-01), Forestieri et al.

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