METHOD FOR NOISE-IMMUNE DECAMETRE RADIO COMMUNICATION WITH HIGH-SPEED DATA TRANSMISSION Russian patent published in 2024 - IPC H04B7/00 

FIELD: radio communication.

SUBSTANCE: in the decametre radio communication method, a more noise-resistant radio communication decametre mode is used, at which on the transmitting side in the second unit of N channel keyers to each channel keyer with sequence number i at the initial moment of time of each clock interval with duration of T_chan k symbols are supplied in parallel and synchronously from the corresponding k outputs of the serial-to-parallel converter, and at the receiving side, a third group of N additional coherent combining units (CCU) with sequence numbers from 1 to N is introduced, wherein each additional CCU with sequence number i supplies the voltage of the resultant signals from the outputs of the corresponding CCUs with the same sequence numbers i from the first group of N CCU and from the second group of N CCU, in each additional CCU phasing unit, the voltage of the corresponding input resultant signal is normalized by the levelling amplifier and supplied to the first and second multipliers, wherein in the first phasing unit the output voltage of the first multiplier is filtered by the first measuring filter and supplied to the second multiplier, and in the second phasing unit the output voltage of the first multiplier is filtered by the second measuring filter and supplied to the second multiplier, output voltage of the second multiplier of each phasing unit is supplied to an adder, which output voltage is filtered by the resultant oscillation filter and supplied to the additional CCU and through the normalizing amplifier of the resultant oscillation is supplied to the first multiplier of each phasing unit, output resultant signal of each additional CCU with sequence number i from the third group of N additional CCU is supplied to the corresponding channel demodulator with the same sequence number i of the unit of N channel demodulators.

EFFECT: high noise-immunity of receiving binary information when exposed to additive spectrum-focused channel interference due to transmission of discrete information by means of two group signals within telephone channel band and optimal coherent addition of received samples of channel signals, carrying the same binary information as part of corresponding samples of group signals.

1 cl, 3 dwg, 2 tbl