STRUCTURAL-FREQUENCY METHOD OF INCREASING NOISE IMMUNITY OF RADIO DATA TRANSMISSION CHANNEL Russian patent published in 2023 - IPC H04L27/10 H04L25/49 H03M5/12 

FIELD: radio engineering.

SUBSTANCE: intended for use in radio communication systems (RCS) using a structural-frequency method for increasing the noise immunity of a Manchester code digital frequency-modulated radio signal. The structure-frequency method of increasing the noise immunity of a radio data transmission channel additionally consists in the fact that before starting work, synchronization of the transmitting and receiving party is ensured by pre-programming the mode of synchronous tuning of the operating frequency according to a pseudo-randomly. On the transmitting party, the digital information bit sequences of the Manchester code, depending on the signal-interference situation, are expanded with a given Barker code with the possibility of n-fold multiplexing of each bit with the selected Barker code, forming a frequency-modulated broadband noise-like radio signal of the Manchester code with low power spectral density below the density level power of natural radio interference and transmit it to the receiving side, synchronized with the transmitting party. In this case, each information bit sequence of the Manchester code is transmitted on a different frequency channel in accordance with a given pseudo-random frequency mode. At the receiving side, the Barker code is demodulated into a digital information bit sequence of the Manchester code.

EFFECT: increasing the structural, energy and frequency security of the radio signal and, as a consequence, to increase the noise immunity of the radio channel.

1 cl, 1 dwg