Handheld Intelligent Mobile Communication Jammer Research

The jammer plays an important role in the application scenarios such as anticheating,anti-leakage of company confidential meetings,and prohibition of illegal aerial photography.However,the traditional jammer has some problems like high power consumption,inportability,and single function.In this regard,this thesis researches and designs a set of handheld intelligent mobile communication jammer system with miniaturization,low power consumption,and flexible software configuration function.The jammer is capable of jamming communication devices operating in the frequency range of 70MHz-6GHz.The main work of the thesis is:1.Three interference mode design schemes of traditional interference,intelligent tracking interference and intelligent self-interference are proposed,and the latter two schemes have obvious effect on the reduction of power consumption of the whole machine compared with the traditional interference mode.The three interference modes used in this thesis also support multi-channel coverage and time-sharing interference.2.The system scheme of handheld intelligent mobile communication jammer is determined.According to the system index requirements,this thesis adopts the system architecture consisting of AD9364 portable RF transceiver,baseband chip FPGA,control chip STM32 and RF front-end,which is the basis for the miniaturization and flexible software configuration of the jammer system.3.The design and implementation of the jammer system is completed.It mainly includes chip selection and evaluation,schematic design,PCB layout drawing,structure design,etc.RF front-end module and power supply module are evaluated and designed;heat dissipation,noise interference,and signal isolation issues are given key considered in the design of the jammer system.At the same time,the debugging interface was integrated into the secondary development board to reduce the layout size.4.The design and the development of the bottom and upper layer software of the jammer system is completed.The underlying software implements functions such as transceiver chip function configuration,transceiver link signal transmission,baseband signal processing,and interference mode control.The host computer supports userdefined working mode and interfered objects,configuration and acquisition of system parameters,and offline use.5.The debugging and testing of the whole system is completed.The measured technical indicators meet the established requirements,the functional verification results are good,and the system can operate stably for a long time.The jammer system developed in this thesis is small,flexible with low power consumption.At the same time,it supports software customization and covers 70MHz-6GHz band,which is suitable for multi scene use.