二次雷達探測建模與仿真研究
[Abstract]:Secondary radar has been widely used in military and civil aviation control systems because of the reports of specific information such as target location, identity, altitude and flight status. With the increase of air traffic flow, The existing air traffic control system can no longer meet the increasingly onerous air traffic control. In the process of air control, because the second radar interrogator of ground station is 1030MHz, and the answering frequency of transponder is 1090MHz, the false target will exist because the target is too close to the same frequency interference. In addition, in the transmission process, the response signal will cause multipath interference due to the presence of reflection. The existence of these disturbances will have a great impact on the work of controllers and the orderly operation of air traffic. It is necessary to identify and suppress the jamming targets of the secondary radar in the air traffic control system. Based on the analysis of the mechanism and signal characteristics of various kinds of jamming, this paper analyzes the synchronous jamming and asynchronous jamming from the A/C/S mode level of the secondary radar data, aiming at the causes of the secondary radar jamming and its influence on the detection results. The influence of multipath interference on the detection results. Combined with engineering practice, a series of modeling and simulation methods are put forward. The signal level detection simulation is transformed into the data stream detection simulation, the target trajectory motion process is established, and the simulation experiment is carried out by using matlab software. The improved adaptive hough transform and logic method are used to deal with the radar track, and the target jamming is demonstrated in the simulation results. The experimental results show that the modeling and simulation research accords with the principle of the secondary radar detection in the actual process, and the modeling process can be used in the development of the subsequent engineering software. It provides powerful support for the development of secondary radar detection simulation software, reduces the expenditure in the process of secondary radar research, and provides reliable data.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TN958.96
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