METHOD OF PACKET DATA TRANSMISSION WITH NOISE-LIKE PHASE-SHIFT KEYED SIGNALS Russian patent published in 2024 - IPC H04L27/20 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in systems for noise-immune packet data transmission. Method of packet data transmission with noise-like phase-shift keyed signals consists in the fact that two binary periodic pseudorandom sequences are generated, a synchronization sequence (SS) and an information sequence (IS). SS is M-sequence, and IS is formed from M-sequence by adding one constant element. At the beginning of the transmission of each data packet, the IS is phased with the SS and a quadrature phase-shift keyed clock signal is transmitted, for the formation of which the carrier signal is first phase-keyed SS, and then additionally phase-shifted by 90 degrees at those time intervals, on which values SS and IS do not match. Duration of the clock signal is selected equal to an integer number of repetition periods IS. When transmitting data, at each repetition period IS, a modulated sequence (MS) is generated by cyclic shift of the M-sequence, from which IS is formed, by the number of elements determined by the transmitted information symbol, and adding one constant element. Carrier frequency signal is modulated with data from an additional information source by multiposition phase-difference modulation with a transmission duration equal to the repetition period IS. Obtained signal is phase-keyed through 180 degrees by a sequence which is a modulo two sum of SS and MS.

EFFECT: high speed of data transfer.

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