ISAR imaging with linear array-antenna

A linear array-antenna ISAR (LAA ISAR) was concerned in this paper. The imaging geometry and signal model of LAA ISAR were analyzed in detail, and the imaging procedure as well as simulation results were given. Compared with traditional ISAR imaging, the echoes of different antenna element in LAA ISAR should be process before imaging, and a similar digital beam forming method was proposed to solve the problem. After pre-processing, range-Doppler algorithm was adopted to accomplish the imaging process, the minimum entropy criterion (MEC) was used for envelope alignment, and the phase gradient autofocus algorithm (PGA) was adopted to fulfil the phase error correction. Simulations were executed in the end and all results illustrated the effectiveness of the LAA ISAR.