Passive synthetic aperture radar imaging of ground moving targets

Abstract

In this paper we present a method for imaging ground moving targets using passive synthetic aperture radar. A passive radar imaging system uses small, mobile receivers that do not radiate any energy. For these reasons, passive imaging systems result in significant cost, manufacturing, and stealth advantages. The received signals are obtained by multiple airborne receivers collecting scattered waves due to illuminating sources of opportunity such as commercial television, radio, and cell phone towers. We describe a novel forward model and a corresponding filtered-backprojection type image reconstruction method combined with entropy optimization. Our method determines the location and velocity of multiple targets moving at different velocities. Furthermore, it can accommodate arbitrary imaging geometries. we present numerical simulations to verify the imaging method.

Incorporation of aircraft orientation into automatic target recognition using passive radar

“…This paper develops ATR algorithms for ‘passive radar’ systems, which are detailed next. Although some work has explored the possibility of forming images with passive radar data [5–9], the limited amount of data available from most passive radar systems renders image formation from passive radar extremely difficult. Hence, passive radar sources naturally lend themselves to the direct approach to ATR.…”