| The ground penetrating radar (GPR) and through-wall radar detect and identify a target, by transmitting electromagnetic signals and processing the reflected signal. Migration had been a common method used in radar signal processing to obtain geophysical images and sketch the reflected data in the correct scatering position. In this thesis a study about different imaging and migration techniques, is performed. An improved radar migration imaging technique is then proposed by taking into account the effect of a two media environment in the signal velocity and signal path. The signal reflected coefficients are refocused on a possible target location or locations, ensuring a strong reflection in the presence of a target and a low reflection otherwise. The F-K migration is the baseline technique in our image generation. The F-K will migrate the focused data and obtain a 2-D matrix with the approximate scatering coefficients locations with respect to the depth. This focusing, windowing and F-K process are repeated several times along a grid, allowing us to reconstruct a sectional image which will be filtered using the filtering after backprojection process obtaining a deblurred reconstructed image. |
