METHOD OF MODULATING HIGH-FREQUENCY SIGNALS Russian patent published in 2024 - IPC H04L27/20 H03M13/00 

FIELD: wireless communication systems.

SUBSTANCE: invention relates to wireless communication systems, specifically to digital communication equipment, and can be used to transmit discrete information over radio communication channels. Method of modulating high-frequency signals is that digital signals are emitted by a transmitter through n parallel output stages, to each of which one of n frequencies is received from the frequency synthesizer for emitting messages from a plurality B of digital messages. Radiation occurs through an antenna unit containing n antennas, each of which is connected to a digital information source. Transmitter has a switched voltage source and a device for setting the values of the initial phases of the emitted signals. Digital information source output register is conditionally divided into series-connected K n-bit units, and voltage from their output in a given order is controlled by a switched voltage source, providing K! combinations of output voltages. Information from the above units is supplied to the antenna unit, the stages of which radiate signals at the specified frequency, which arrives to them from the commutator. Switch is connected to a frequency synthesizer. Identical initial phases of all frequencies are set by means of a device for setting one of P initial phases of signals. Each of the K_i units contains the number of bits defined as K_i=N/n, where N is the capacity of the output register, n is the number of synthesizer frequencies. Each K_i n-bit unit has its own amplitude of output pulses, and similar bits of each K_i unit are connected to each other, providing summation of output signals of each of the bits at one of the frequencies. Similar bits of each K_i unit are also connected to each of the n output units of the transmitter. Set B of signals is calculated as B=P K!n!mⁿ, where m is a possible number of amplitudes obtained in each of n output stages as a result of addition of signals of similar bits of each K_i unit at any of n frequencies.

EFFECT: high noise-immunity of the system, wider message alphabet and simple radio signal modulation pattern.

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