METHOD OF TRANSMITTING AND RECEIVING SIGNALS IN MODE OF PSEUDORANDOM TUNING OF OPERATING FREQUENCY UNDER RESPONSE TO INTERFERENCE Russian patent published in 2022 - IPC H04B1/713 

FIELD: radio engineering and communication.

SUBSTANCE: invention relates to radio engineering and is intended for use in noise-immune radio communication systems with pseudorandom operating frequency tuning. Method of transmitting and receiving signals in mode of pseudorandom tuning of operating frequency under response to interference consists in the fact that before the communication session on the receiving side, the noise level is successively measured at each operating frequency, a test sequence of units is formed on the transmitting side, each bit of the test sequence of units is successively manipulated with the amplitude of the harmonic oscillation at the operating frequency, a radio signal is emitted towards the correspondent, at the receiving side at each of the operating frequencies, the value of the phase difference of the harmonic oscillation is calculated, from the obtained values, a phase difference vector is formed, phase difference vector is transmitted to the correspondent, during the communication session on the transmitting side, the useful information is divided into bits, each bit is alternately transmitted at its frequency, each bit of information is manipulated with amplitude of harmonic oscillation at operating frequency, radio signal is emitted towards correspondent, at the receiving side, reception is carried out at frequencies, the amplitude of the radio signal is detected based on the threshold value of demodulation at the operating frequency, the obtained information bits are transmitted to the recipient of the message. Phase of the harmonic oscillation on the receiving side is measured at ten periods at the end of radiation and ten periods at the beginning of radiation. Phase of the harmonic oscillation on the transmitting side is shifted by a value corresponding to the value of the received phase difference vector. Reception frequencies are determined in accordance with the given pseudorandom sequence.

EFFECT: high noise immunity of receiving signals.

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