Accession Number:

AD0625072

Title:

METHOD OF SEPARATING ONE AMPLITUDEMODULATED SIGNAL FROM TWO MIXED AM SIGNALS WITH SUPERPOSED SPECTRA, BUT DIFFERENT CARRIERS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1965-12-09

Pagination or Media Count:

9.0

Abstract:

The proposed method is characterized by the fact that for eliminating the disturbance from the original signal coming from an amplifier of intermediate frequency and representing the sum of two AM oscillations with superposed spectra, but with different carriers, there is separated with the aid of a very-narrow-band filter the carrying oscillation of that AM oscillation which is looked on as the disturbance. The separated oscillation is transformed in the frequency doubler, after which the obtained oscillation of double frequency is cross-multiplied with the original signal and on the product there is superposed the original signal. By matching the phase of the oscillation of the doubled frequency and the ratio of the amplitudes of the original signal and the mentioned product, the compensation of the mixing AM oscillations is assured. The oscillations contained in the product on frequencies close to the tripled frequency of the carrying oscillations are eliminated by frequency filtrations, and the remainder containing the two AM oscillations with different carriers doubly exceeding the difference between the carrying and original oscillation either are subjected to simple frequency filtration if the spectra of these oscillations are not superposed, or in the opposite case repeatedly subjected to the described treatment, repeating it as many times as are necessary for getting the difference of the carriers at which the spectra of the oscillations can be separated by simple linear filtration.

Descriptors:

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE


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