The Detection Modeling And Simulation Of Secondary Surveillance Radar

The secondary radar has been widely used in military and civil aviation control systems because of its specific information on target location,status,altitude and flight status. With the increasing air traffic flow, the existing air traffic control system has can not meet the increasingly heavy air traffic control. And in the air control process, because the ground station secondary radar interrogation machine inquiry frequency is 1030MHz, airborne answering machine response frequency is 1090MHz, therefore, the false target because the target distance is too close to the same frequency interference exists.In addition, the response signal in the transmission process, because there is reflection caused by multipath interference target. The existence of these disturbances will have a great impact on the orderly work of the controller and the orderly conduct of air traffic. It is necessary to identify and suppress the interference targets of the secondary radar in the ATC system.Based on the analysis of the mechanism and signal characteristics of various false targets, this paper analyzes the causes of interference from the secondary radar data A / C / S model and the influence of the secondary radar on the detection results,and analyze the effect of synchronous interference, asynchronous interference, multipath interference and so on on the detection results. Based on the engineering practice, a series of modeling and simulation methods are proposed. The simulation of the signal level is transformed into the simulation of the data flow. The target trajectory motion process is established. The simulation experiment is carried out using Matlab software, and the improved adaptive hough transform and logic method to deal with the radar path, the target interference in the simulation results radar track marked out. The experimental results show that the modeling and simulation research is in good agreement with the secondary radar detection principle in the actual process, so that the modeling process can be used in the development of the subsequent engineering software, and the development of the secondary radar detection and simulation software support, to reduce secondary radar research process spending, to provide reliable data.