Accession Number : ADD006788

Title :   OPSK Demodulator with Two-Step Quadrupler and/or Time-Multiplexing Quadrupling.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hook,William R ; Hilberg,Ronald P

Report Date : 25 Dec 1979

Pagination or Media Count : 8

Abstract : A QPSK demodular apparatus utilizing a pair of doubling units in tandem but separated by a bandpass filter to remove any undesired cross products and to eliminate possible noise signal that may be applied to the second doubler is described. The use of two doubling units to provide a times 4 quadrupling allows the use of heterodyning in order to operate at a lower frequency. (Author)

Descriptors :   *Patents, *Phase shift keyers, *Time division multiplexing, *Demodulators, Noise reduction, Noise(Electrical and electromagnetic), Bandpass filters, Heterodyning, Synchronization(Electronics), Mixers(Electronics)

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE