Efficient and Precise Processing for Squinted Spotlight SAR through a Modified Stolt Mapping. (16th November 2006)

• Record Type: Journal Article
• Authors: Vandewal Vandewal, Marijke Marijke; Speck Speck, Rainer Rainer; Süß Süß, Helmut Helmut
• Other Names: Mecklenbräuker Mecklenbräuker Christoph Christoph Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2007(2007)
• Publication Date: 2006-11-16
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2007/59704
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : Processing of squinted SAR spotlight data is a challenge because of the significant range migration effects of the raw data over the coherent aperture time. Although in theory the (ω, k )-algorithm takes care of these aspects, its digital implementation requires a time-consuming interpolation step. Moreover, the limited precision of this interpolation can introduce distortions at the edges of the final image especially for squinted geometries. A wave number domain processing using a modified Stolt mapping will be developed and analyzed to enhance the quality of the final SAR image. Additionally, the proposed algorithm has a decreased computational load compared to the original (ω, k )-algorithm. Simulation results will validate the focusing and efficiency performances of the modified wave number domain algorithm.