METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING PHASE-SHIFT KEYING IN COMMAND CONTROL RADIO LINK USING OFDM TECHNOLOGY Russian patent published in 2021 - IPC H04B7/208 

FIELD: data transmission.

SUBSTANCE: invention relates to the field of systems for transmission of information over a radio channel and can be used in constructing command control radio links (CCRLs) operating with binary phase-shift keying signals. To realize the described result, the method is characterized by the fact that the CCRL control command is transmitted in form of an OFDM symbol formed on the transmitting side after signal modulation using the inverse discrete Fourier transform (IDFT), and on the receiving side, DFT is executed in the extended frequency band before demodulation, considering the frequency instability of reference generators of the receiver and transmitter, and an m-channel scheme is used in the receiving apparatus to minimize the impact from the fractional frequency shift ε_ƒ, wherein the OFDM symbol with an excess DFT length is analyzed in the decoding apparatus to correctly retrieve information about the presence of the transmitted control command therein.

EFFECT: providing increased interference resistance of the command control radio link.

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