A noncoherent system approach to through-the-wall radar imaging

A noncoherent, stepped-frequency, through-the-wall radar system approach, based on a trilateration technique, is presented. This approach involves multiple independent radar units and, as such, provides flexibility in positioning the units with various stand-off distances and inter-element spacing. We demonstrate the proposed noncoherent system approach in an indoor environment using real data. The experimental results show that the radar is able to detect and locate multiple targets behind walls.