METHOD OF GENERATING SIGNALS WITH A SPREAD 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 pseudo-random synchronization and information sequences. K sequences are formed by summation modulo two cyclically shifted synchronizing and information PRS. Cyclic shifts of the synchronizing PRS are fixed and different, and the information PRS bandwidth is determined by K symbols of the transmitted information. Binary symbols of sequences are replaced by opposite integers. A sequence of complex numbers is formed, the real part of which is the sum of elements L from K of the transformed sequences, and imaginary is sum of elements of remaining (K-L) sequences and transformed synchronizing PRS. 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