1 Department of Applied Mathematics and Computer Science, Technical University of Denmark2 Embedded Systems Engineering, Department of Applied Mathematics and Computer Science, Technical University of Denmark3 National Space Institute, Technical University of Denmark4 Microwaves and Remote Sensing, National Space Institute, Technical University of Denmark
Synthetic aperture radar, SAR, is a high resolution imaging radar. The direct back-projection algorithm allows for a precise SAR output image reconstruction and can compensate for deviations in the flight track of airborne radars. Often graphic processing units, GPUs are used for data processing as the back-projection algorithm is computationally expensive and highly parallel. However, GPUs may not be an appropriate solution for applications with strictly constrained space and power requirements. In this paper, we describe how we map a SAR direct back-projection application to a multi-core system on an FPGA. The fabric consisting of 64 processor cores and 2D mesh interconnect utilizes 60% of the hardware resources of a Xilinx Virtex-7 device with 550 thousand logic cells and consumes about 10 watt. We apply software pipelining to hide memory latency and reduce the hardware footprint by 14%. We show that the system provides real-time processing of a SAR application that maps a 3000m wide area with a resolution of 2x2 meters.
Lecture Notes in Computer Science: 26th International Conference, Prague, Czech Republic, February 19-22, 2013. Proceedings, 2013, p. 74-85
Main Research Area:
Lecture Notes in Computer Science
26th International Conference on Architecture of Computing Systems (ARCS 2013)Architecture of Computing Systems