The study of hybrid spread-spectrum in communication channel with UAV

In this work, hybrid method of spreading the spectrum are studied. The purpose of this work is to estimate the jamming resistance of the hybrid method of spreading the signal spectrum under the influence of narrow-band interference in the communication channel with an unmanned aerial vehicle. This work is based on the analysis of the characteristics of the spread spectrum methods by direct sequence and frequency hopping spread spectrum. An analysis of the hybrid system for spreading the spectrum and channels with fading described the distributions of Rice and Rayleigh for different UAVs. Models for spreading techniques are constructed using Matlab-Simulink software with different sequence lengths and the number of frequency channels used when narrow-band interference is affected in the transmission channel with AWGN. During the study, it was found that the hybrid spread spectrum method effectively suppresses narrow-band interference in the transmission channel with AWGN. It is concluded that for the communication link with UAV it is expedient to use the hybrid method of spreading the spectrum, since it is the most jamming resistance and the directions of further work are determined.