METHOD FOR TRANSMITTING DISCRETE SIGNALS IN THE MODE OF PROGRAM ADJUSTMENT OF THE OPERATING FREQUENCY WITH VARIABLE MODULATION PARAMETERS Russian patent published in 2022 - IPC H04B1/10 H04B1/713 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio engineering and is intended for use in noise-proof radio communication systems for the transmission of discrete signals. The method for generating a signal in the PPRF mode with variable modulation parameters is that the primary signal S(t) is generated in a non-harmonic basis, a reference oscillation M(t) is formed, the signal S(t) is multiplied with the reference oscillation M(t), the parameters of the generated signal are selected in accordance with a given pseudorandom code sequence O₁(t) synchronously with a change in the frequency of the reference oscillation M(t), code words are formed synchronously with each change in the frequency of the reference oscillation M(t) based on pseudorandom sequences O₁(t) and O₂(t), on the transmitting side, the frequency band of the tonal frequency channel is divided into two bands based on the frequency boundary value, the first and second code words are formed from the information sequence, the order of the first, second, third, fourth wavelet functions is selected based on the code sequence O₁(t), the elements of the first and second code words are replaced by radio pulses, the radio pulses of the second code word are inverted and the addition of radio pulses is performed, based on the received primary signal S(t), a single-band modulation signal is formed at the intermediate frequency, the generated single-band signal is demodulated, the single-band modulation signal is formed and radiated towards the correspondent, after which the frequency of the reference oscillation M(t) changes, on the receiving side, after selecting the operating frequency of the oscillation M(t) in accordance with the code word sequence O₂(t), the single-band modulation signal is demodulated, the radio pulses of the first and second code words are separated, in accordance with the code sequence O₁(t), the radio pulses are replaced with logical elements of the information sequence, which is transmitted to the recipient of the message. The frequency boundary value is selected using the pseudorandom sequence code word O₁(t). Radio pulses are obtained, respectively, from the first, second and third, fourth wavelet functions. The length of the codewords is determined based on the order of the wavelet functions. The carrier frequency during demodulation is selected equal to the sum of the values of the intermediate frequency and the boundary value of the frequency obtained in accordance with the code word of the pseudo-random sequence O₁(t), based on the demodulated signal at the operating frequency determined by the code word of the sequence O₂(t). When adding radio pulses, the pulses of the first code word are first summed up, then the second with their subsequent addition. The frequency of the reference oscillation M(t) is changed in accordance with the algorithm for implementing the mode by the operating frequency adjustment program.

EFFECT: increase in the noise immunity of a radio signal by combining the properties of signals obtained in a non-harmonic basis of wavelet functions of various orders and single-band modulation signals manifested in the asynchronism of transmission in a radio line, which is implemented on the basis of PPRF with variable modulation parameters.

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