参差MTI优化设计及硬件实现
[Abstract]:With the development of society and the progress of science and technology, radar has a broad application prospect in military field and daily life. From the angle of war, our requirement for radar is to be able to deal with the target echo signal in time and effectively. In order to realize the real-time, effective search and tracking of mass moving targets, that is, to process the echo signal reasonably, to extract the target parameters that we need, and to suppress the clutter interference information that we do not need, so as to guide the artillery. Missiles and other weapons attack targets. Therefore, whether the radar system can play its due effect in the complex electromagnetic environment has become an urgent problem for military and civilian electronic equipment. Among the echo signals received by radar, in addition to the target signal, there are often all kinds of clutter jamming signals. Clutter such as various ground objects, clouds and rain, waves and metal wire interference from the enemy often accompany the target signal. The most important problem is to extract the relevant parameters and suppress clutter interference. In the suppression of clutter, how to solve the blind velocity effectively to improve the detection ability of clutter suppression signal becomes a core task. In view of this problem, the design and implementation method of staggered MTI filter is presented. In this paper, the following works are carried out: firstly, the types and characteristics of radar clutter are introduced, then the common methods of clutter suppression are introduced, and the model of "blind velocity" problem is given. Then, this paper introduces several optimization algorithms of staggered codes for "blind speed", in which genetic algorithm is used to complete the optimization of staggered codes, and the staggered MTI is designed by using the staggered codes obtained by optimization. To solve the problem of blind velocity and clutter suppression, the filter is designed under different conditions for clutter suppression and target detection in the case of single clutter and multiple clutter. And through the algorithm simulation, the performance of the introduced method is analyzed. Finally, combined with the hardware platform of a radar signal processing system, the structure and composition of radar signal processing hardware platform and the algorithm implementation scheme are introduced. The AMTI filter in staggered MTI is given in the case of single clutter and multiple clutter. The method of clutter suppression is realized. The software design and function realization of the communication controller in the system are emphatically introduced. Finally, the suppression function of AMTI filter in staggered MTI to single clutter and multi-clutter is realized through hardware platform construction and hardware program debugging.
【学位授予单位】:西安电子科技大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:TN957.51
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