3D Fast Factorized Back-Projection in Cartesian Coordinates

Author(s)

Goes, Juliana A. ; Castro, Valquiria ; Bins, Leonardo Sant'Anna ; Hernandez-Figueroa, Hugo E. ; IEEE

• Document type: Journal article
• Source: 2020 IEEE RADAR CONFERENCE (RADARCONF20); v. N/A, p. 6-pg., 2020-01-01.

Abstract

This paper presents a novel 3D Fast Factorized Back-Projection (FFBP) algorithm that is based on an extension of the quadtree approach. A flexible 3D tree structure is generated from a modified Morton order or Z-order curve, a recursive space-filling curve that is suitable for FFBP algorithms. This paper presents, as well, an original method for defining sub-apertures. The proposed algorithm can be applied to any flight path and is about 90 % faster than the direct back-projection, yielding high-resolution 3D images with low phase errors and high degrees of coherence. (AU)

• FAPESP's process: 17/19416-3 - Drone-borne radar for sugar cane precision agriculture
• Grantee: Hugo Enrique Hernández Figueroa
• Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
• FAPESP's process: 18/00601-8 - Remote sensing radar carried by drone
• Grantee: Dieter Lubeck
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE