METHOD FOR SPREADING SIGNALS SPECTRUM Russian patent published in 2019 - IPC H04L27/20 

FIELD: electrical communication engineering.

SUBSTANCE: invention relates to anti-jamming communication systems and can be used to generate signals with a spread spectrum. Proposed method consists in generating two quasi-orthogonal PRS synchronizing and information. Information PRS is cyclically shifted by the number of elements determined by the transmitted information symbol and modulo two with an additional information bit. Binary symbols of sequences are replaced by opposite integers. Sequence of complex numbers is formed, the actual part of which is an element of one transformed PRS, and the imaginary part is the other. At the beginning and at the end the sequence is supplemented with zero elements and its inverse discrete Fourier transformation is performed. Sequences of actual and imaginary parts of obtained readings are filtered in correcting filters, converted into analogue signals into a DAC, filtered in LFF and modulated by them radio-frequency signal by quadrature method.

EFFECT: high speed of transmitting information and reconnaissance protection, low level of out-of-band radiation.

1 cl, 1 dwg