Intensity-Only Synthetic Aperture Radar Imaging
Abstract
PI Kim and Co-PI Tsogka have worked on developing and analyzing the performance of efficient and robust algorithms for solving the inverse scattering problem in complex media. The major advances of this work pertain to imaging using intensity-only measurements. By leveraging diversity created by adequate multiple illuminations of the imaging region and using the polarization identity, i.e. an explicit algebraic relation that relates the inner product of two complex vectors to norms of those vectors, intensity measurements are converted to interferometric measurements. Diversity in the illuminations may be created by considering multiple frequencies, plane-waves with different angles of incidence, multiple source locations or combinations of the above. Once the interferometric measurements are recovered, imaging maybe performed using traditional L2-methods, MUSIC, or sparsity promoting L1-minimization. The main advantage of the developed methodology is that there is no need for phase retrieval. Moreover, this approach reconstructs images over the entire imaging region simultaneously. There is no scanning or slicing of the region required. The method is general and should be useful for a broad variety of intensity-only inverse scattering problems ranging from microwave to optical imaging regimes. Major accomplishments of this project are 19 publications of original research with 3 additional manuscripts submitted for publication. The PI and Co-PI also gave numerous presentations of this research at professional conferences and hosted mini-symposia to foster collaborations with other leading researchers. Additionally, this project helped to support a graduate student, Omar DeGuchy, on the application of machine learning to synthetic aperture radar imaging problems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 03, 2020
- Accession Number
- AD1110813
Entities
People
- Arnold D. Kim
Organizations
- University of California