RCS sequence reconstruction based on ADMM sparse ISAR imaging

Abstract

Aiming at the problem of radar echo missing in azimuth direction and the problem of high costs of radar echo measurement in microwave chamber and in outfield, a method of radar cross section (RCS) sequence reconstruction based on Alternating Direction Method of Multipliers (ADMM) sparse ISAR imaging is developed in this paper. Firstly, the gapped RCS sequence is transformed into high resolution range profile (HRRP). Secondly, the ADMM algorithm is applied to obtain the sparse ISAR image of the target, which is theoretically the same as the real ISAR image. Finally, the 2D-IFFT is conducted to recover the RCS sequence. Benefits of this approach include breaking the Nyquist limit and suppressing the noise interference. Simulation results confirmed the effectiveness of the presented method.