NOISE CORRECTION DEVICE FOR BROAD-BAND PHASE-KEYED SIGNAL RECEIVER Russian patent published in 1999 - IPC

FIELD: radio engineering; broad-band signal communication systems. SUBSTANCE: device has series-connected first subtractor, first multiplier, first band filter, phase shifter, second multiplier, second subtractor, third multiplier, rejection filter, fourth multiplier, adjustable-gain unit whose output is connected to other input of first subtractor. Inputs of first and second subtractors are combined to form device input. Output of first multiplier is connected through series-connected second band filter, amplifier, and detector 10 to other input of unit. In addition, output of band filter is connected at the same time through series-connected second phase shifter, limiter, and fifth multiplier to respective inputs of third and fourth multipliers. Output of signal copy generator is connected to respective inputs of first, second, and fifth multipliers. Device output is first multiplier output. EFFECT: improved noise immunity relative to structural noise. 2 dwg