Target Detection And Tracking Study Of Distributed MIMO Radar

As a new system radar,MIMO radar was proposed in 2003.It has the advantages of high angle measurement accuracy,strong multi-target tracking ability,strong antiinterference ability and reduced interception probability,which have made MIMO radar become a research hotspot in radar field.The distributed MIMO radar combines the unique array arrangement of radar station and the unique advantages of MIMO radar,which makes the radar system have great potential in anti-jamming,anti radiation,anti low altitude invasion,anti reconnaissance and anti stealth.This thesis studies the performance of distributed MIMO radar system in target detection and tracking filtering under the background of experimental application.The main research work includes the following aspects.Firstly,the principle and composition of distributed MIMO radar experimental system have been introduced,Orthogonal binary code waveform has been designed by using genetic algorithm and the duty cycle of the transmitted waveform has been controlled due to the distance of the blind zone of radar detection,the experiment of transmitting and receiving channel correction has been designed and the principle of array error amplitude and phase correction has been given.Finally,the array error correction has been completed.Secondly,distributed MIMO radar target detection has been studied.The target has been searched by digital multiple-beam forming,then the following processes include matched filter,MTD operation,digital multiple-beam synthesis between nodes has been completed by estimating target delay and phase difference parameter,the synthesis efficiency has been improved to over 90%.The authenticity of the target has been detected by CFAR technology,a focusing the target method in multiple-beam has been given.Finally,the method of single-pulse and differential beam angel-measurement algorithm is used to measure the angle of target.Thirdly,the design of target tracking filter system has been completed,including data association,tracking filter and track management.Data association has been completed by nearest neighbor algorithm and fuzzy clustering algorithm,tracking filter of maneuvering target has been achieved by interactive multiple model algorithm.Finally,the target track management has been completed through five steps: track head,track start,track confirmation,track update and track cancellation.Fourthly,the signal processing scheme of the distributed MIMO radar experimental system and the terminal display interface of target track have been designed.Target detection experiments have been performed using a radar system,target echo processing and track display have been completed by MATLAB programming software.The validity of distributed MIMO radar in target detection and tracking filtering has been verified.