Design Of Multi-channel Jammer Control System

With the rapid development of Unmanned Aerial Vehical(UAV)technology,the incidents of UAV “black flying” occurs frequently.The flying has seriously threatened the airspace security of airports,military restricted zones and other sensitive areas.Therefore,this paper designs a eight-channel jammer control system on the software radio platform of ZYNQ and AD9361.The control system can dynamically configure parameters for every channel,and each channel can independently emit interference signals with different frequency and different modulation modes to interfere with UAV signal within multi-band and with multi-mode.The system can upgrade its software online.In this paper,scheme of the multi-channel jammer control system was designed,where ZYNQ embedded development platform,multi-task operating system Free RTOS,and two kinds of interference emission modes,namely high-power broadband suppression and wide-band fast sweeping have been adopted.A hardware platform for the control system was designed based on the FPGA integrated chip xc7z020clg484-1,which supports ARM core.The hardware platform supports embedded control and digital baseband control.The platform includes microprocessor module circuit,memory module circuit,communication module circuit,function module circuit and other auxiliary module circuits.The function module circuit consists of AD9361 module and power control module,where the former converts baseband signal into radio frequency signal and the latter controls the power amplifier device.In the integrated development environment of Visual Studio2012,Xilinx SDK2015.4 and Vivado2015.4,I performed the software design of upper machine control system(UMC),embedded control system(ECS)and digital baseband control system(DBC),respectively.I formulated the communication protocols of the parameter configuration module and the online upgrade module.Based on the protocols,UMC transmits the configure parameters and Flash boot bin files to ECS and displays the jammer status,and ECS implements the configuration and management of multi-channel jammer parameters and software online upgrades.DBC implements the generation and transmission of the baseband signals.Indoor tests for the multi-channel jammer control system were carried out in abnormality,performance and function,as well as outdoor functional testing.And the overall power consumption was analyzed.The test results show that UMC can control each channel of the jammer to independently generate interference signals with different frequencies in different modulation modes.The signals can effectively interfere with UAV's GPS signals and remote control signals,and the effectiveness and reliability of the multi-channel jammer control system were verified.