A new strategy of interferogram noise reduction for InSAR

This paper presents a new interferogram noise reduction strategy for InSAR. It emphasizes two aspects: Filtering along fringes using directionally dependent windows selected according to minimum phase differences; Filtering noise adaptively determinated by local noise level, which involves the parameter representing the phase statistics in complex domain. Simulation experiment demonstrated the effectiveness of this strategy by its capabilities in fringe preserving, residue reduction and adaptive noise filtering.