Research On Monitoring Capabilities Of Locating Ground Interference By The Scattering Signal From Airplanes

In recent years,with the extensive use of radio technology and the rapid development of civil aviation,the scenario of civil aviation band inferred by ground radio signal become more frequent.However,there are a variety of problems during utilizing traditional solutions,such as a limited range of monitoring,a long time for investigation and so on.Therefore,the project that this paper relies on," Research on Method and Equipment of Locating Ground Interference Sources by the Scattering Signal from Airplanes "(supported by National Natural Science Foundation of China,Grant No.61139001)not only proposes a method of locating interference sources by scattering signals from airplanes,and also studies on fundamental theory and key technologies to solve problems of existing system.This paper has made a research on the monitoring capabilities of this method.It shows benefits on implement of effective monitoring and is instructive for system design.The paper researches on monitoring capabilities from three aspects:monitoring intensity,monitoring duration and monitoring range.My major contributions in this research work are as follow:1.Performed statistical analysis of the state-of-art models of domestic airlines;utilized SolidWorks to model the popular Boeing 737-800 aircraft;simulated and analyzed the scattering characteristic of aircraft in frequency and spatial domain with PO/MOM of FEKO;obtained the distribution characteristics of aircraft RCS and the value of RCS in multi-frequency and multi-angle;fitted the curve of RCS changes with the scattering angle using Matlab Neural Network Toolbox and the fitting error was small.2.Simulated and analyzed the distribution characteristics of monitoring intensity under fixed aircraft position and flight path respectively according to the distribution pattern of RCS and radar equation;proposed an intensity distribution calculation method;analyzed the duration of monitoring based on the dynamic distribution of monitoring intensity,then proposed a method to calculate the distribution of monitoring duration;defined monitoring range and proposed a method to estimate the monitoring range based on the combination of monitoring intensity and monitoring duration.3.Proposed a method of station deployment under known interference source based on radar equation,then simulated and verified;proposed a method of station deployment in full coverage based on the estimation of monitoring range,the verification result can satisfy requirements for certain monitoring intensity,duration and coverage.4.Based on the research achievement above,proposed the method of assessing and optimizing monitoring capabilities from three aspects namely monitoring intensity,duration and range,and it can be applied in system design or optimization.