METHOD FOR PACKET DATA TRANSMISSION WITH NOISE-LIKE SIGNALS Russian patent published in 2023 - IPC H04L27/20 H04J13/00 

FIELD: radio engineering.

SUBSTANCE: used in systems of noise-protected packet data transmission. The method of packet data transmission with noise-like signals consists in the fact that at the beginning of the transmission of each data packet, a sync signal is transmitted, which is formed by quadrature modulation of the carrier frequency signal with two binary pseudo-random sequences, synchronizing (SS) and informational (IS). The SS is an M-sequence, and the IS is formed from the M-sequence by adding one constant element. The duration of the clock signal is chosen as a multiple of the repetition period of the IS. When transmitting a packet header, at each IS repetition period, a modulated sequence is formed by cyclically shifting the M-sequence from which the IS is formed by the number of elements determined by the next header symbol and adding one constant element. The carrier frequency signal is manipulated in phase by a sequence of modulo two elements of the modulated sequence and elements of the SS extended by one element. When transmitting data, each IS repetition period is divided into the same time intervals. At each time interval, a modulated sequence is formed by cyclically shifting the additional M-sequence by the number of elements determined by the transmitted data symbol and adding one constant element. The carrier frequency signal is manipulated in phase by a sequence of modulo two elements of the modulated sequence and elements of the SS extended by one element.

EFFECT: increasing the noise immunity of the packet data transmission system.

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