High resolution contiguous swath synthetic aperture radar imaging via co-located multiple input multiple output array

Korkmaz, Furkan (2022). High resolution contiguous swath synthetic aperture radar imaging via co-located multiple input multiple output array. University of Birmingham. Ph.D.

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Abstract

The Synthetic Aperture Radar (SAR) is a well-known imaging radar. Whilst its technology is proven, it is, however, subject to improvement as technology improves, just like any other technical system. With the use of multiple antenna, high-resolution wide swath (HEWS) imaging has advanced dramatically, a duty that MIMO radars are currently fulfilling. Parallel to this, co-located, linear MIMO arrays have proliferated; they are already utilised for automobile safety features, and their compact form factor allows them to be deployed on drones. These platforms are unique in that they frequently require contiguous azimuth swaths (for example, aerial field surveying or monitoring road conditions), but they also have the potential to perform high-resolution imaging due to the high operating frequency of commercial MIMO arrays (24 and 77 GHz) and the short stand-off distances. MIMO-SAR systems make use of newly developed SAR systems. A new branch of MIMO-SAR imaging has emerged, utilising high-frequency low-altitude UAV/drones. A novel model, high-resolution contiguous swath could potentially fill a gap in this sector (ARCS). The concept specifically employs Digital Beamforming (DBF) techniques, which are enabled in such systems to give contiguous azimuth imaging, as in stripmap SAR, but with a fine spatial resolution comparable to spotlight SAR. Strip-Spot SAR, which we have devised as a new concept, was initially examined as SAR and MIMO-SAR, after which the concept's key principles were analytically defined and empirically validated under laboratory conditions with calibrated targets and extended targets. It is hoped that it will be able to serve as a model for future research on contiguous swath imaging.

Type of Work:

Thesis (Doctorates > Ph.D.)

Award Type:

Doctorates > Ph.D.

Supervisor(s):