Research And Realization Of Military Frequency Hopping Signal Simulation Platform

The war in the future will be the information-based and electronic-based modern war. Owing to the various electronic equipments slather on the modern battlefield, the electromagnetic signals will become very dense, as a consequence, an extra complicated electromagnetic environment will be formed. Responding to the requirement of modern equipments development, project "XXX" simulates a real-time battlefield communication environment including the instantaneous, wide frequency-band, ample signal patterns, dynamic-controllable electromagnet signal environment and standard and measurable signals. We can apply them inside or outside the proving ground which can be used as appraising, hence to provide authentic technical proof for finalizing the design of equipments and training the army.Based on the interchangeable hardware platform which inspired by the thoughts of wireless software, this thesis presents how to simultaneously and flexibly generate several multi-parameter frequency hoping signals according to the orders in the project "XXX" which can fulfill the requirement of producing multi-parameter frequency hoping signals in complex emulation electromagnetic environment.Firstly, the thesis introduces the background of this research project and the basic theories of frequency hopping communication system. Secondly, the systemic and holistic design proposal will be led in including a brief introduction to chip selection. Then we will come to see the basic principles of frequency hoping sequence and DDS frequency synthesizer. The signal flow of chip AD9957 will be briefly introduced. At last, adopting the design structure of "computer+FPGA+DDS", we program FPGA in the computer. By controlling AD9957, we realize the production of a frequency hoping signal and two orthogonal frequencies hopping signal.