METHOD OF INVERSION OF PHASE FRONT OF MULTIFREQUENCY WIDEBAND SIGNALS Russian patent published in 1997 - IPC

FIELD: radio engineering. SUBSTANCE: method of inversion of phase (wave) front of multifrequency wideband signals consists in the fact that the input multifrequency wideband signal is multiplied by the narrow-band signal of a doubled carrier frequency, with the aim of compensation for noise signals at a triple carrier frequency a multifrequency wideband signal orthogonal with respect to the input signal conjugate according to Hilbert is generated at a carrier triple frequency; a narrow-band signal at a doubled carrier frequency orthogonal conjugate according to Hilbert is generated; the orthogonal conjugate to Hilbert multifrequency wideband signal is multiplied by the orthogonal conjugate to Hilbert narrow-band signal of doubled carrier frequency; the resultant signal of the second multiplication is summed up with resultant signal of the first multiplication of the input multifrequency wideband signal and narrow- band signal of doubled carrier frequency; the narrow-band signal of doubled carrier frequency is formed from the input multifrequency wideband signal by filtration and doubling of its carrier frequency. The method is conveniently realized within a wide frequency band from audio to supersonic frequencies, in the class of noisy signals inclusive, both in analog and digital forms. EFFECT: facilitated procedure. 1 dwg