The conventional ISAR image is a two-dimensional (2-D) projection of a thre
e dimensional (3-D) object surface. The image (projection) plane is related
to the motion of a target with respect to the line of radar sight (LOS). I
n general, the image plane and the image scale in the cross range direction
can not be determined by the traditional ISAR system with one receiver unl
ess the target motion knowledge is known. In this paper, we propose a new I
SAR system with three receivers. Using the three-receiver ISAR system, 3-D
images of maneuvering targets can be generated, where the knowledge of the
target motion is not required.