Spaceborne Distributed Sar Moving Target Detection And Speed Measurement

In recent year, people pay more attention to the distributed satellite SAR system. Thismodel system brings forward a new concept SAR system. The micro-satellitescooperate together to accomplish one or more tasks, which has equivalent function witha big satellite. The new model system can provide more baseline and Contribute to datafusion. It has much more advantage than conventional single spaceborne SAR systembecause its baseline selection is agile and alterable.This dissertation mainly researches the Displaced Phase Center Antenna (DPCA)technique in the new system, and the contributions are calculated as following:1. This dissertation set up the model of the micro satellites going with the primary,deduced particularly formula, proved the ADPCA technique can be used in thedistributed satellite system to detect moving target. And some computersimulations illustrate the problem convincingly.2. We compare the detection performance of ground moving target of the ATI andADPCA technique for the new model of distributed spaceborne SAR in detail.Simulation results are presented which illustrate the problem convincingly.3. Analyze the insufficiency of traditional ATI technique to measure the movingtarget speed and proposed a new method unified stretch-chirp processing andshort-time Fourier transforms to measure the moving target's speed, from theclutter to carry on interference.4. Propose a new ADPCA method based on Radon in new model of distributedspaceborne SAR.. Simulation results indicate feasibility and effectiveness ofthe methods5. Propose a new ADPCA method based on FRFT in new model of distributedspaceborne SAR, which can focus and relocate moving targets. Simulationresults indicate feasibility and effectiveness of the methods...