Through The Wall Imaging Parameters Affect The Analysis And Measurement

Through-wall-imaging-radar can detect and image blocked target by using electromagnetic wave through the wall which can be widely uesd in various areas such as antiterrorists, enforcement, judicature and rescue service. Due to the indetermination or false estimation of wall parameters, the targets may shift from their true positions, the imaging precision may low. So the wall effect should be analysed and compensated.This dissertation mainly researched on the effect of two important parameters: wall thickness and dielectric conatant, and confirmed the measurement of them. The main work is as follow:1,Established the model and algorithms of imaging. Analysing the effect of electromagnetic wave spread path as well as time delay and energy attenuation due to the wall, established the target model, wall model, signal model and through wall imaging model respectively, and chosen the most useful algorithms.2,Researched the effect of wall parameters to the imaging precision. Compensating the spread time delay and illustating the stock-still point target, analysing the effect of wall thickness and dielectric conatant qualitatively.3,Derived the cross-range profile resolution equation。Derived the cross-range profile resolution equation in the present of wall quantificationally.4,Researched the effect of wall parameters to the imaging position. Analysing the effect of wall thickness and dielectric conatant to imaging position quantificationally.5,Established the measurement of wall parameters. With parameters error estimation model, providing the measurement of wall parameters when one parameter is unknown and both parameters are unknown.By emulational illustating the above imaging model, parameters affect analysis and feasibility of measurement. It can provide evidence of improving imaging quality and enhancing imaging presicion.