Imaging Through a Circular Pipe Using Synthetic Aperture Radar

In this paper, we show how synthetic aperture radar techniques used in free space can be adapted to the problem of imaging through an open pipe. By collecting monostatic data along a synthetic aperture and projecting into the matched filter of the pipe channel, a two-dimensional image can be formed. A closed form solution is used to compute the matched filter for a straight circular pipe. The point spread response is subsequently removed using the matching pursuit procedure to reduce sidelobe interference. The imaging methodology is demonstrated through simulation and corroborated with measurement data collected in the laboratory.