Abstract：Since the airborne radar clutter spectrum varies with the range for non-sidelooking arrays, the clutter covariance matrix can not be estimated by the neighboring range cells due to the non-homogenous in range. To resolve the range-dependent clutter non-homogenous problem, especially for the short range cell, an improved Doppler warping algorithm is proposed in this paper, which implemented the space frequency compensation in element-Doppler domain for the Doppler warping compensated data, and results in an improved mainlobe clutter suppression performance. Compared with the original algorithm, the proposed algorithm is also simple and easy to be realized. In addition, it overcomes the performance degradation under big crab angle. Simulation results verify the validity of this method.
2009, Vol. 31 
