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US 4,480,236 AGranted
Channelized serial adaptive filter processor
AssigneeSperry Corporation
InventorRichard W. Harris
Life of this patent
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Abstract
A method and apparatus for eliminating narrow band noise and interference from a wide band signal while maintaining the wide band signal substantially intact.
Claims8
A filter circuit system comprising,
- input means for supplying a wideband signal which contains undesirable narrowband signal components,
- bandpass filter means connected to said input means,
- adaptive filter means connected to receive signals from said bandpass filter means, and
- summing means connected to sum said input signal and the signal produced by said adaptive filter means and to produce a control signal which is applied to said adaptive filter means to control the operation thereof.
1 more element
A method of separating wideband signals from narrowband signals wherein,
- a combined signal including wideband and narrowband signal components is supplied to at least one summing apparatus,
- said combined signal is supplied to a bandpass filter and an adaptive filter series combination to produce a first narrowband signal, and
- said first narrowband signal is algebraically summed with said combined signal at said summing apparatus.
The method of separating narrowband signals from wideband signals by passing the wideband signal through a plurality of serially cascaded adaptive filters which filters individually operate upon the narrowband signals such that the filters collectively separate the narrowband signals from the wideband signal while leaving the wideband entirely intact.
Dependencies are inferred from the claim text.