Research/Patents/US 5363112
US 5363112

NOISE SUPPRESSION PROCESSOR FOR A CARRIER TRACKING LOOP

Assignee

BOEING COMPANY, THE, SEATTLE, KING COUNTY, WASHINGTON A CORP OF DELAWARE

Filed

Jul 5, 1989

Granted

Nov 8, 1994

Location

KENT WA US

Abstract

A noise suppression processor maintains a carrier tracking loop in a receiver in lock in the presence of high noise levels to permit the receiver to measure range changes from a remote transmitter in noisy environments. The noise suppression processor is connected in the carrier tracking loop between the phase detector which produces the loop error signal and the loop filter. The noise suppression processor has a cubic-limiter transfer function to provide nonlinear amplification of the loop error signal while limiting the amplified error signal to predetermined maximum and minimum values.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Nov 9, 1990

Rescinded

Mar 22, 1994

Duration

3 years, 4 months

Inventor

  • 1GEORGE S. HATCHER

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records