A new method based on BP algorithm for measure displacement to ground-based interferometric radar

In this paper, we proposes a new method based on back projection algorithm (BP) to measure displacement for ground-based interferometric radar. The method obtains two images collected at two different times via BP algorithm. And then we can achieve the phase difference of the two obtained images via conjugate multiplication operation. After that, the displacement of the target can be retrieved based on the relationship between displacement and phase difference. Detailed numerical experiments also demonstrate the effectiveness of the proposed method.