Interference Signal Circuit Design And Implementation

Jamming is an important branch in the Electronic Countermeasure (ECM).This designutilizes the direct digital synthesis technology (DDS) and delay-superposition to generatejamming signals. This design is realized with two FPGA chips. One chip implements DDSand delay-superposition functions, and the other implements test and controlling functions.This thesis studies the principle of the circuit that generates jamming signals, therealization of software and the realization of hardware, and also provides some test results.This thesis firstly introduces the thought of system design, the basic structure anddesign procedure of FPGA, the power supply design, and the characteristics and functionsof some chips and the JTAG interface. Then this thesis introduces the principle of DDS, therealization of DDS, and the simulation test results of MATLAB and QUARTUSⅡ. Thirdlythis thesis provides the realization of the delay-superposition module, and the simulationtest results of MATLAB and QUARTUSⅡ. The realization of the test module and some ofthe hardware that used in the test module are given. This design adopts Verilog HDLlanguage to realize all kinds of functions. Finally this thesis introduces several tools whichare used in debugging: Digital oscillograph, COMAPI which is a kind of software used forserial transceiver, and SignalTapⅡattached of QuartusⅡ, and provides some test processand results.