METHOD AND DEVICE FOR TRANSMITTING MESSAGES BY BROAD-BAND SIGNALS Russian patent published in 1999 - IPC

FIELD: radio communications. SUBSTANCE: method involves transmission of information signal modulated by pseudorandom train which is shifted in time through one step depending on amplitude of signal transmitted, accumulation of results of multiplication of received signal by copy of modulating pseudorandom train, their comparison, and selection of channel where greater number of multiplication results are accumulated. Device implementing this method has carrier and clock frequency oscillator, modulating pseudorandom train generator, phase keyer, two multipliers, synchronizing device, pseudorandom train copy generator, two integrators, and delay circuit. EFFECT: improved recovery of phase-keyed signal on receiving end with reasonable power requirement for radio equipment. 2 cl, 3 dwg