The Integrated Technologies For Positioning Cooperative And Non-cooperative Objects On The Airport Surface

In the field of airport security,the realization of safe and reliable monitoring of the scene is the basis of maintaining the safe and effective operation of the airport.Aiming at the problem of airport surface surveillance,this thesis designs an integrated positioning system structure of cooperative and non cooperative targets,and uses the combination of radar ranging and positioning algorithm to locate the targets.According to the airport surface monitoring standard,the system is divided into four parts: control center,transmitting station,cooperative receiving station and non cooperative receiving stationThe control center has the function of receiving and processing the information transmitted by cooperative and non cooperative receiving stations,classifying and displaying the target,which is composed of data transmission module,information processing module and display module.The transmitting station has the function of signal generation and transmission.St-lfmcw is used as the transmitting waveform,which is composed of timing module,communication module,signal generation module and signal transmission module.The cooperative receiving station is installed on the cooperative target and has the function of self positioning.It is composed of timing module,communication module,signal generation module and signal receiving and positioning module.In this thesis,a location algorithm of cooperative receiving station is proposed,which uses 2D-FFT radar algorithm to achieve range measurement.After obtaining multiple sets of range measurement values,the target is located by using the TDOA algorithm based on Chan.The influence of distance measurement error,number of participating positioning transmitting stations and range sensitivity on the TDOA location algorithm is analyzedThe non cooperative receiving station has the function of positioning all the active targets in the monitoring area,which is composed of timing module,data transmission module,signal receiving and positioning module.In this thesis,the positioning algorithm of non cooperative receiving station is proposed.The angle,distance and measurement of the target are realized by using beamforming technology and 2D-FFT algorithm.After obtaining the angle,distance and measurement values,the simulation verification of single station TSOA / AOA positioning algorithm and multi station TSOA positioning algorithm is carried out respectively.The influence of distance and angle measurement error on single station positioning algorithm is analyzed and compared The influence of error,number of transmitting stations and range sensitivity on the multi station location algorithm based on Chan and Taylor.Through simulation and experimental verification,the system proposed in this thesis can locate all the active targets on the scene.