METHOD OF TRANSMITTING INFORMATION USING A SUBSTITUTING LOGICAL TERNARY NOISE-RESISTANT CODE Russian patent published in 2020 - IPC G08C19/28 

FIELD: information transmission system.

SUBSTANCE: invention relates to systems for transmitting information and can be used to increase noise immunity of received messages and digital signals in interference conditions. Symbols S_i (i = 0, 1, 2) of ternary code are duplicated by corresponding symbols T_i (i = 0, 1, 2), which are represented by pulse-width modulation (PWM₃) with corresponding values of pulse duration: T₀, T₁ = 1.5T₀ and T₂ = 2T₀, where T₀ is duration of initial symbols of binary code "1" and "0". Essence of the invention is also that generated PWM₃ pulses T₀, T₁ = 1.5T₀ and T₂ = 2T₀ is filled in the next step of encoding the binary Barker code symbols, respectively, and with a duration of each of them (τ_p), 4 times smaller than T₀. To expand the signal spectrum, each of the Barker codes is used, complemented at the end of the code structure with a binary symbol "1", filling the initially formed pauses in a single spreading code sequence. As a result, broadband communication is realized. Also, it seems necessary when using algorithms of fast Fourier transform (FFT) in data transmission systems, which is oriented only for certain duration of bits.

EFFECT: technical result consists in simultaneous meeting of two requirements: reduced redundancy of transmitted symbols of digital code and high noise-immunity of reception thereof based on a transition before modulating the signal with a pulse sequence, having not two code symbols "1" and "0", and three symbols S_i (i = 0, 1, 2) of the ternary code, which are in form of amplitude-pulse modulation (APM₃) with corresponding values of pulse amplitude: A₀, A₁ and A₂.

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