The Generation And Synthesis Of Intermediate Frequency Signal Of Ground And Sea Clutters By DDS

It's necessary for the debugging and testing to Radar, the Radar Simulation Control System can avoid not only the enormous economic wasting of the Real Test,but also the restriction of when and where.The system design an opening environment of realtime simulation and experiment for the simulation of the information of the state of target tarce,of the clutter, of the jamming and so on.All of this made the debugging and testing to Radar done in laboratory easily.What we do is one part of the Radar Simulation Control System.Firstly,this article summarize the function of the Radar Simulation Control System,it show us the function and structure of the system.Then,the article deals with the procedure of clutter simulation in detail and introduce the current distribution models used in clutter simulation,especially, the method of ZMNL used in clutter simulation. And this article simulated the ground and sea clutters in accordance with the requirement on technology of modern radar. On basis of simulation,the article introduce the method of design and maintenance of the databases of ground and sea clutters.What we should do in the simulation of intermediate frequency analog signal of ground and sea clutters is convert the clutter sequence series come from the simulation and computation on to clutter intermediate frequency analog signal.In the second half of this article,it introduce us the development of the hareware module of the generation of intermediate frequency signal of ground and sea clutters in the method of DDS and the synthesis of intermediate frequency signal as well as the design of its software module. The method of simulation the intermediate frequencysignal of ground and sea clutters is the abvious method called DDS——Direct Digitalfrequency Synthesis.This article also showed us the development of the computer application software and the VxWorks driver of the hareware in the angle of system. In the last,the article discuss the application of this system and anlyse the development in future.