Experimental study on accurate 3-dimensional imaging method based on extended RPM for rotating target

The 3-D reconstruction radar techniques are required for coast-guard patrols. While many 3-D reconstruction methods exploiting ISAR images have been proposed, they assume only pointwise targets. For objects with continuous boundaries, such as a wire, their accuracy is, however, severely degraded owing to scattering centers shifting on target surface. Solving this difficulty, this paper extends RPM (Range Points Migration) method to ISAR model. Numerical and experimental validations demonstrate that our method accomplishes accurate 3-D imaging even for non-point targets.