Signal Subspace Processing of Uncalibrated MTD-SARs
Abstract
The main achievement of our efforts in this period was to test the proposed signal subspace using realistic Displaced Phase Center Array (DPCA) SAR data. The SAR data were part of a four-channel DPCA database at X band (spotlight mode); the data were provided by the Air Force Research Laboratory at Wright Patterson Base, Ohio. The DPCA-SAR data were collected over a scene that contained various moving and stationary targets on a clear land; there were also moving and stationary targets near an area with man-made structures and dense trees. The data were originally collected for processing through conventional Ground Moving Target Indicator (GMTI) methods. However, Our processing was the first attempt to coherently combine the entire slow-time domain data (approximately 4800 pulses taken over 5 degrees of look angle) for GMTI. A non-overlapping block-based implementation of the signal subspace algorithm was used for processing of the DPCA. Our preliminary results indicate that the proposed signal subspace method can overcome the miscalibration between the two channels of the DPCA over the entire slow-time period, and provide a reliable statistic for GMTI on both a clear land and a foliage region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1999
- Accession Number
- ADA368872
Entities
People
- Mehrdad Soumekh
Organizations
- University at Buffalo