Study On Coherent Jamming And Effect Evaluation Methods Of InSAR

InSAR is new sensing technology developed in the basis of SAR.It not only combines the advantages of traditional SAR technology and interference technology effectively, but also breakthrough the traditional SAR only get two-dimensional imaging. Related to SAR imaging processing,imaging registration,inteferometric phase unwrapping and many steps.InSAR foreground is very wide in military application,it has increasingly becomes an important battlefield reconnaissance sensor development of world military power.A number of milepost meaning InSAR system has put into use. Battlefield survivability for military ground targets constitute a real threat.Therefore, research on new technology of InSAR Jamming is imminent. Under the military circumstance is the dissertation accomplished, and the main achieved research are as follows:Fristly, the basic principles of InSAR jamming are discussed, On the basis of, InSAR date processing flow and several key joint is introduced, at the same time,simulate the joint of the InSAR date processing, and simulation imaging is given. Besides, each image is analysised.In addition,interference imaging use the actual measurement date has been given,imaging impression is preferable.Then, builds the signal model of Cycling Linear Shift Frequency Jamming. Along range and across range imaging characteristics are analysised, accurate and manipulative rectangle striate patch in SAR imaging of Cycling Linear Shift Frequency Jamming is revealed. In addition, rectangle patch, striation number and area size expressions has be deduced.How to get Cycling Linear Shift Frequency Jamming is be given,and analysis the reconnaissance depence of it. On the basis of, analysis the inteferometric phase of InSAR imaging on Cycling Linear Shift Frequency Jamming, points out inteferometric phase is a constant approximately, and the “slope” effect in InSAR imaging of Cycling Linear Shift Frequency Jamming be clarified. Cycling Linear Shift Frequency Jamming parameters can be ignored. The simulation experiment has be given, and agreement with the theoretical analysis.In the next place, analysis of the advantages and disadvantages of evaluation methods as the subjective and the objective evaluation methods. From SAR evaluation methods this paper put forward some InSAR objective evaluation methods, includes the evaluation methods based on Euclid distance space, the evaluation methods based on Correlation coefficient,and the evaluation methods based on Effective points.Then the paper a new method of combination and optimization is proposed. In the end, simulation showed the advantages and disadvantages of every evaluation methods, and enriches the means of jamming evaluation to SAR.Lastly, an InSAR jamming simulation system is developed,and functions of system modules are detailly introduced. The system can simulate three-dimensional terrain and echo, Four kinds of jamming targets including point, line, surface, and cubic targets can be generated, many jamming modes are provided. In addition, InSAR imaging process and results are validated under different jamming modes. Detail interpretation of the functions and principles of each module, as well as a demonstrating example, are given.