The alignment problem for 3D ISAR imaging with real data

The alignment between the point-like 3D inverse synthetic aperture radar (ISAR) reconstruction produced by 3D ISAR imaging and model of the target is an essential issue in target recognition by 3D ISAR reconstruction, which contains coarse alignment and accurate alignment. The coarse alignment can be accomplished by principal component analysis (PCA). However, PCA may suffer from the 180-degree am...