Study On Airborne Radar Performance Evaluation And Cooperative Detection Method

The radar is facing more and more complex battlefield environment,an increasing number of targets and target types are present in modern battlefield.In addition,the invisible targets and electronic interference are also serious threats to modern radar.In order to adapt to modern battlefield environment,two methods can be adopted,respectively,to improve the performance of single radar and multi-radar cooperative detection.Therefore,the study of airborne radar performance evaluation and cooperative detection method is of great significance.The system design of the airborne radar is limited by a series of factors such as platform load,installation size,power supply and so on.The design of the system needs to make a compromise between multiple parameters,and the land clutter with Doppler spread will also cause an effect to the detection performance.Therefore,the system design of the airborne radar is more difficult than the design of ground radar.A complete process for the performance evaluation of airborne radar is proposed,which is suitable for airborne radar performance evaluation in clutter background,which has certain reference value for the system design of airborne radar.In the case of the border air defense alert,the area requiring vigilance is usually broad.In order to alert the key areas in real time and seamlessly,multiple radar needs to be coordinated to complete the detection coverage of the key areas.To solve the problem of cooperative area coverage for airborne radar,a path planning algorithm based on angle search is proposed.According to the principle of real-time coverage maximization,the path of airborne radar cooperative detection is given.In addition,two optimization methods are proposed to solve the problem that the coverage of the warning area is reduced due to the direct flight of the aircraft.Finally,the simulation results demonstrate the effectiveness of the proposed method and the optimization methods.The work of this thesis is outlined as follows:1.The research on the method of airborne radar performance evaluation.First,the signal model and simulation method of airborne radar clutter are analyzed.Then,the method of beam position design and radar detection range in noise background is given.Finally,some calculation methods of airborne radar performance parameters are introduced.And the complete process of airborne radar performance evaluation is proposed,illustrated by the 2/4 criterion,evaluates performance improvement in the clutter background.2.The research on cooperative area coverage method of airborne radar.First,it analyzes that the existing path planning algorithms must be applied to the situation that the aircraft has a certain flight destination,and can not be applied to multi-aircraft cooperative area coverage.To solve this problem,a path planning method based on angle search is proposed,which can plan reasonable routes for multiple aerial carriers and can be adjusted in real time in some situations such as exhaustion of fuel load,failure or enemy shooting.Finally,two optimization methods are proposed to solve the problem that the coverage of the warning area is reduced due to the direct flight of the aircraft.And some simulation experiments demonstrate the effectiveness of the proposed method and the optimization methods.3.The study of detection performance under airborne radar cooperative detection.First,the principle and criterion of the traditional distributed detection are analyzed.Then the simulation results show that the traditional distributed detection can effectively improve the detection performance of the whole alert area.Finally,it analyzes and simulates that the distributed detection method based on MIMO can further improve the detection performance.