Research on MIMO-ISAR High Resolution Imaging Technology

Abstract

The high resolution ISAR two dimensional image is very important for the detection and recognition of long-range non-cooperative targets such as satellites, missiles, aircraft, etc. However, traditional ISAR imaging requires a long imaging time to improve the imaging resolution and usually requires constant velocity motion of the target. To solve the above problems, many researchers have proposed an imaging radar which combines MIMO (Multiple Input Multiple Output) with ISAR (Inverse Synthetical Aperture Radar) technology, which theoretically overcomes the shortcomings of traditional ISAR. Therefore, this paper conclusion MIMO-ISAR high-resolution imaging from three aspects, first summarizes the sub-band synthesis technology to achieve one-dimensional distance image high-resolution. Second, systematically expounds the basic method of Doppler blurring of MIMO-ISAR echo data. Finally, the MIMO-ISAR imaging algorithm is summarized and the performance of the existing methods is evaluated. Based on the analysis of the above three aspects, the further research direction of MIMO-ISAR high resolution imaging technology is prospected.