| Electronic warfare plays an important role in modern warfare.As the main weapon of both sides of the war,the jamming signals have a great influence on the outcome of the war.In order to speed up the development of hardware system,improve the portability of the system,design and verify the jamming signals quickly,in this thesis,a modular design method of the jamming signal synthesis is proposed,and the synthesis of the jamming signal has been modularize based on a graphical development method,which named System Generator.Firstly,the division of functional module in the modular design has been completed.In this thesis,jamming signals are abstracted into a general Digital Radio Frequency Memory(DRFM)jamming signal model and suppression jamming signal model by analyzing DRFM jamming signals and suppressing jamming signals.The jamming models are divided into functional modules base on the mathematical model of the jamming signal.The DRFM jamming signal model is divided into functional modules such as Store-and-Forward module,Delay-and-Overlay module,High-Precision-Delay module and Drag-Control module.The suppressive jamming signal model is divided into functional modules such as Signal-Synthesis module,Doppler-Frequency-Synthesis module,Noise-Synthesis module,and Complex-Multiplication module.Secondly,the design of functional module in the modular design has been completed.In this thesis,multiple circuits of functional modules are designed by System Generator.Due to the problem that the delay accuracy of current DRFM jamming is low,a solution which has the advantage of accuracy has been proposed.In order to increase the universality of the jamming models,in this thesis,functional modules are designed as a multi-channel parallel structure,and the same function modules are encapsulated into one packaged model that can specify the number of parallel channel of the current module through the parameters setting interface.Finally,the modular design of the jamming signal has been completed,and the modular design method has been proved to be practical.In this thesis,a variety of DRFM jamming signal models and suppression jamming signal models are built based on functional modules.In order to prove the practicability further of the modular design method,the radar transmitting signal model required for testing the jamming model is first established through the functional modules.Then the functional simulation and hardware co-simulation of various DRFM jamming signal models and suppressing jamming signal models are performed combined with the radar transmitting signal model.Finally the jamming effect of the jamming models are analyzed from the simulation data.In summary,the innovation of this thesis is to combine the synthesis of jamming signal with the modular design propose a modular design of jamming signal,and provide a high-precision DRFM delay solution.In this thesis,the design of jamming models are effectively proved to be successful by simulating and analyzing the jamming model.The effectiveness of modular design and high-precision DRFM jamming signal is validated further through hardware co-simulation of jamming signal models.What this thesis researched has certain significance to engineering realization the jamming signals. |
