Accession Number : ADD010520

Title :   Adaptive Feed-Forward System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bauman,Ronald M

Report Date : 21 Jun 1983

Pagination or Media Count : 8

Abstract : A feed-forward system for reducing the distortion products from a device such as an amplifier, wherein a sample of the device input signal is subtractively combined with a sample of the device output signal to produce a sample of the distortion products. The distortion sample is adjusted in amplitude and phase and subtratively combined with the device output to produce a distortion-reduced system output. A synchronous detector correlates a sample of the system output, in which the proportion of distortion has been increased, with another sample of the distortion products to produce control signals for a modulator which adaptively adjusts the amplitude and phase of the distortion sample subtratively combined with the device output. (Author)

Descriptors :   *Patents, *Adaptive systems, *Feedback, *Control theory, *Modulators, *Control systems, *Phase distortion, Amplitude modulation, Distortion, Phase modulation, Output, Synchronism, Input, Signals, Detectors, Control, Coupling(Interaction)

Subject Categories : Numerical Mathematics
      Cybernetics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE