An Optimized FPGA Implementation of SAR Backprojection Autofocus

verfasst von

Niklas Rother, Christian Fahnemann, Holger Blume

Abstract

Synthetic Aperture Radar on board of small UAVs (“drones”) could enable a new field of applications. Due to their unstable flight path, autofocus processing is often required to generate usable images in this context. To enable real-time on-board processing high performance and energy-efficient hardware is required. This paper reports on an FPGA implementation of the Backprojection Autofocus algorithm using a specialized numeric optimization method called Parallel Autofocus Optimization. The hardware design is analyzed for throughput and power consumption. Results show that autofocus processing requires 36.5× the time and 24.7× the energy on our implementation, compared to Backprojection processing alone.

Organisationseinheit(en)

Fachgebiet Architekturen und Systeme
Institut für Mikroelektronische Systeme

Typ

Aufsatz in Konferenzband

Seiten

44-49

Anzahl der Seiten

6

Publikationsdatum

2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Signalverarbeitung, Instrumentierung