Through The Wall Radar Moving Target Detection And Location

By transmiting ultra- wide -band electromagnetic wave which can penetrate the obstacles just like wall, clpboard and so on, Through-the-wall Detecting Radar (TWDR) receives the echo from the targets and analyzes that, then it can detect and locate the objects behind the obstruction.Because of the obstruction, Through-the-wall Detecting Radar has some differences with general radar in detecting and locating the moving targets, to the problem, the primary researching work of this paper:1. The characteristic of electromagnetic wave penetrating the medium which is no metal is analyzed and the means to calculate the reflecting and refraction coefficient is given, the model of echo for TWDR is established and the system of TWDR is analyzed;2. By analyzing the characteristic of the echo arriving straightly and the applicability of the means to reduce it in existence.Given a approach of it's reduction, it is extremum point localization based on characteristic of step frequency TWDR to reduce the echo effectively;3. Researching the basic methods of estimating the time delay of echo, an approach based on Wavelet Transform is given by analyzing the characteristic of the echo of TWDR to estimate the time delay of echo availably;4. By analyzing the refraction phenomena of electromagnetic wave and the error of localization is resulted in this phenomena, an approach based on the refraction theorem and another approach based on different assumed parameters are given to proofread the error in the trilateration scheme by the refraction phenomena;Using simulation and experimental data we validate the validity of the methods.