SYSTEM TO TRANSMIT AND RECEIVE DISCRETE INFORMATION OVER RADIO CHANNELS OF PULSE-PHASE RADIO NAVIGATION SYSTEM Russian patent published in 1997 - IPC

FIELD: radio communication, radio navigation, data transmission. SUBSTANCE: pseudo-random sequence generator incorporating first and second adders connected in series by module 2, OR circuit, shift register and detector of code combinations with corresponding coupling are added into transmitting equipment of system to transmit and receive discrete information over radio channels of pulse-phase radio navigation system including selector mechanism, encoder, storage and coder connected in series and reference voltage generator, former of initiation pulses, phase modulator, OR circuit, radio transmitter and transmission aerial connected in series to exclude influence of transmission of discrete information of quality of reception of radio navigation signals. Receiving equipment of system to transmit and receive discrete information includes receiving aerial, aboard reception indicator, register and demodulator connected in series, decoder and coordinate digital converter. Demodulator has demodulation channel incorporating equivalent circuit, coincidence circuit and binary counter connected in series, cycle synchronization unit and is supplemented with former of reference voltages and N-input computer, (N-I) demodulation channels with corresponding couplings. Coder has four module 2 adders and four AND circuits connected to them. EFFECT: exclusion of influence of transmission of discrete information of quality of reception of radio navigation signals. 2 cl, 4 dwg