Narrowband parameter estimator

Details Narrowband parameter estimator Narrowband parameter estimator

1988-09-28

1990-08-07

Shaw, Dale M.

Boots, shoes, and leggings

455306, G06F 1531

Patent

active

049473611

ABSTRACT:
A narrowband parameter estimator circuit is described which can be used to estimate the frequency and the relative power of narrowband interference tones which reside in a wideband information signal. A two-weight adaptive filter with a phase/frequency-lock loop circuit works in conjunction with a stepped synthesizer to lock onto the individual narrowband interference tones. A lock-detect circuit signals a digital logic unit to record the frequency of the stepped synthesizer and to measure the power in the adaptive filter output signal. This same output signal is used to cancel the unwanted tone in the wideband information signal being transmitted.

REFERENCES:
patent: 4105977 (1978-08-01), Fitting et al.
patent: 4177430 (1979-12-01), Paul
patent: 4368429 (1983-01-01), Jamison
patent: 4569072 (1986-02-01), van Roermand
patent: 4627079 (1986-12-01), von der Embse
patent: 4638493 (1987-01-01), Bishop et al.
patent: 4649505 (1987-03-01), Zinser, Jr. et al.
patent: 4731587 (1988-03-01), Jensen

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