| In recent years,with the advancement of science and technology,more and more new demands arising in political,economic and cultural development have been met.UAVs in the civilian sector,especially consumer-grade small multi-rotor UAVs have been rapidly developed,which made the number of UAVs dramatically increased and also increased security risk.Considering the supervision problems of consumer-grade small multi-rotor UAVs,this thesis develops an integrated platform for UAV signal detection and interference with small size,portability,convenience and expandability,which can help reduce the impact of a series of security problems caused by the development of this kind of UAVs.It provides good technical support for the supervision of UAVs and has great practical value.The integration platform for detection and interference designed in this thesis is for the 2.4G band remote control signals in the UAV frequency hopping communication system.This thesis first studies the principle of frequency hopping communication system and the basic principle of detection of corresponding frequency hopping signals,then analyzes the difficulties of real-time detection,the measured results of 2.4G band remote control signals of DJI Mavic Pro UAV and the common power interference methods for frequency hopping signals.This thesis finished design in three parts:(1)confirmed that the integrated platform needed to have basic detection and interference functions and also had the characteristics of portability,expandability,low power consumption,small size and high integration;(2)after comparing different detection and interference schemes,frequency sweep receiving was selected as the way to implement detection and linear frequency modulation wave was selected as the way to implement target signals interference;(3)after comparing different transceivers and processors schemes,the ZYNQ and AD80305 chips were selected to form a flexible SDR platform which can achieve the detection and interference functions,besides the AXI bus was studied.According to the design,this thesis mainly finished the implementation including four aspects:(1)after completing device selection and circuit architecture,the whole platform hardware circuit was built,including RF,digital,clock and power,totally four parts;(2)for the programmable logic side of ZYNQ,the development kit Vivado was used to build the basic transceiver data link,data processing link and debug logic module,which completed the construction of the whole digital logic;(3)the configuration of the AD80305 registers was deeply studied,especially the parts of interface,clock,calibration and fast lock mode configuration;(4)for the processor system side of ZYNQ,the development kit SDK was used to complete the initialization of the whole platform,the control of the AD80305 and so on,which achieved the detection and interference functions;(5)after the implementation of the whole integrated platform,system integration was carried out,and board-level test and actual test were completed,which verified the functional integrity and effectiveness of the integrated platform. |
