Azimuth Resolution Enhancement in MIMO-SAR: Signal Model and Imaging Method (opens in new tab)

Spaceborne synthetic aperture radar (SAR) achieves azimuth high-resolution (HR) imaging using wide-beam transmission and high pulse repetition frequency (PRF). HR in the following text refers to azimuth high resolution, unless otherwise specified. However, the pulse repetition interval (PRI = 1/PRF) narrows as PRF increases, and the swath is reduced, since it is proportional to PRI. To achieve HR imaging with a considerable swath, we propose an HR imaging method for multiple-input and multipl...