Research On Adaptive Jamming Technology For UAV Communication

In recent years,due to the increasingly serious security problems caused by the "black flight" of UAV,there have been many incidents endangering public property and even national security.Therefore,the control of the most effective radio interference of illegal UAV has become one of the hot spots in today’s research.However,due to the single jamming mode of the current UAV countermeasures equipment,it is difficult to effectively interfere with different types of UAV.Therefore,it is necessary to develop more intelligent and efficient UAV countermeasures equipment to deal with the increasingly complex UAV threats.In this context,this thesis mainly focuses on the interference of UAV remote control links and GPS and other navigation and positioning signals,and studies the adaptive jamming technology of UAV communication,so as to achieve effective interference to different signals at a small cost.The main research work is as follows:(1)Aiming at the remote control link signal using frequency hopping system,according to its characteristics of narrowband interference resistance,three wideband pressure jamming methods and cheating tracking jamming are selected;Aiming at GPS signal with spread spectrum system,three kinds of narrowband pressure jamming and production deception jamming are selected according to its characteristics of anti-wideband jamming.The interference signal simulation model is established,and the interference performance of the remote control link signal is analyzed theoretically.By changing the respective parameters,the influence of the interference effect under different conditions is simulated,and the optimal interference parameters of each interference pattern are obtained when the desired goal is achieved.(2)By comparing and selecting the parameters with the best jamming effect on remote link and GPS signal,the jamming pattern and jamming duration ratio composed of the best jamming parameters were composed into the jamming action search space,MAB decision model was established,and the jamming decision system of UAV communication was built by using the time-varying ε-greedy strategy.Through simulation tests,the optimal jamming strategies of different signals could be obtained.Achieve the desired interference effect.(3)Based on software radio hardware platform USRP and Lab VIEW,the receiver and transmitter of frequency hopping and spread spectrum communication of simulated UAV signal,as well as the required interference signal transmitter program are designed.The hardware-in-the-loop simulation system model of UAV adaptive jamming is built,and the semi-simulation test of adaptive jamming is completed.The test results show that the system can select the optimal jamming strategy for different targets and achieve the desired jamming effect with a small cost,which verifies the effectiveness of the system.