Hardware Design And Implementation Of UAV Link Suppression And Navigation Deception Platform

With the rapid development of the unmanned aerial vehicle（UAV）industry,civilian small UAVs have gradually entered the lives of the public,and their application in many industries is growing explosively.At the same time,UAVs threaten public security.To reduce the security risks brought by the illegal use of UAVs,it has become a top priority to take effective measures to deal with the threat of UAVs.According to the requirements of UAV countermeasure system,this thesis designs a UAV countermeasure hardware platform that combines link suppression and navigation deception.The main work is as follows:（1）The hardware scheme design of the UAV link suppression and navigation deception platform has been completed.The hardware platform is composed of link suppression module and navigation deception module.The digital baseband part adopts the core processing architecture of DSP + FPGA to meet the functional design requirements of lightweight and high performance of UAV remote control link suppression and navigation deception interference.Among them,the DSP external expansion Ethernet interface is used to realize the communication with the host computer,and the EMIF interface is used to complete the high-speed data transmission with the FPGA;the FPGA external expansion DDR2 SDRAM is used for mass storage of UAV interference signal baseband data.（2）According to the hardware design scheme of the platform,complete the circuit schematic design of the core module.Including the core circuit design of DSP,FPGA,digital-to-analog conversion module,analog-to-digital conversion module and radio frequency module.（3）The FPGA implementation of the UAV countermeasure hardware platform has been completed.The link suppression module realizes the UAV power spectrum calculation,frequency hopping signal synchronization and digital intermediate frequency interference signal generation,and completes the module function configuration of ADC and DAC;the navigation deception jamming module realizes time synchronization and GPS digital intermediate frequency signal generation.The FPGA design adopts the method of serial-to-parallel conversion,which converts the single-channel high-speed acquisition signal into parallel data,and realizes the low-clock and high-speed parallel processing of the FPGA.（4）Complete the hardware platform test and function verification of UAV countermeasure.The test results show that hardware platform can work normally.The functional verification results show that the experimental platform can achieve stable interference to the UAV control link when the signal-to-noise ratio is higher than 18 d B and the signal-to-noise ratio is greater than 5d B;the method of navigation deception can complete the continuous and stable interference to the UAV within the radius of 300 m.To sum up,in view of the security problem of illegal flying UAVs,this thesis adopts the technical means of link suppression and navigation deception,designs a UAV countermeasure hardware platform,and realizes effective countermeasures against UAVs.