METHOD FOR PACKET DATA TRANSMISSION WITH NOISE-LIKE SIGNALS Russian patent published in 2022 - IPC H04L27/20 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio engineering and can be used in radio communication systems with packet data transmission to improve their noise immunity. In the method for packet data transmission, noise-like signals form two binary quasi-orthogonal pseudo-random sequences of maximum length, synchronizing (SS) and informational (IS). At each repetition period of the IS, a modulated sequence (MS) is formed by cyclically shifting the IS of the initial length by the number of elements determined by the transmitted information symbol. IS and MS are extended by one element, and the joint venture is shortened by a certain number of elements. At the beginning of the transmission of each data packet, the SS and IS are phased between each other and a clock signal is transmitted, which is formed by phase manipulation of the carrier frequency signal by the SS sequence and an additional phase shift by 90 degrees if the current values ​​of the SS and IS do not match. The duration of the clock signal is equal to the product of the duration of one element of sequences and a number equal to the least common multiple of the number of SS elements and the number of IS elements. When transmitting data, the carrier frequency signal is manipulated in phase by a sequence that is the modulo two sums of the SS and MS.

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

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