A Novel Method for Parameter Estimation of Space Moving Targets

作者：Tian, J.; Cui, W.^*; Wu, S.

来源：IEEE Geoscience and Remote Sensing Letters, 2014, 11(2): 389-393.

DOI：10.1109/LGRS.2013.2263332

• Keystone transform (KT)
• motion parameter estimation
• Radon-Fourier transform (RFT)
• range migration correction

This letter proposes a novel parameter estimation method based on keystone transform (KT) and Radon-Fourier transform (RFT) for space moving targets with high-speed maneuvering performance. In this method, second-order KT is used to correct the range curvature and part of the range walk for all targets simultaneously. Then, fractional Fourier transform is employed to estimate the targets' radial acceleration, followed by the quadric phase term compensation. Finally, RFT and Clean technique are carried out to correct the residual range walk, and the initial range and radial velocity of moving targets are further obtained. The advantage of the proposed method is that it can overcome the limitation of Doppler frequency ambiguity and correct range curvature for all targets in one processing step, which simplifies the operation procedure. Simulation results are presented to demonstrate the validity of the proposed method.

• 出版日期2014-2
• 单位北京理工大学