Accession Number : ADD017430

Title :   Noise Signal Processor.

Descriptive Note : Patent, Filed 13 May 82, patented 4 Oct 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Pharo, Lawrence C , Jr ; Portelli, John J

Report Date : 04 Oct 1994

Pagination or Media Count : 11

Abstract : This patent discloses an apparatus for providing a direct quantitative readout of the amplitudes of various frequency lines that constitute the envelope of an amplitude-modulated broadband noise signal. A selected band of carrier frequencies is fed to an AGC circuit that provides a constant-input signal amplitude to a demodulator for a period of time that is greater than the period of the lowest frequency of the modulating signal for detection. The detected signal is fed to a spectrum analyzer for the direct reading of the percent modulation. (MM)

Descriptors :   *ACOUSTIC SIGNALS, *AMPLITUDE MODULATION, *PATENTS, SIGNAL PROCESSING, DEMODULATION, BANDPASS FILTERS, SPECTRUM ANALYZERS

Subject Categories : Acoustic Detection and Detectors
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE