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Design of a Real-time High Quality SAR Processor
Presented at SPIE (Orlando, Florida) 1994.
Cite this paper as:
Gordon Pryde, Keith Beckett, L. M. Delves, Chris Oliver and Richard White,
`Design of a real-time high quality SAR processor',
in Algorithms for Synthetic Aperture Radar Imagery,
edited by D. A. Giglio,
Proc. SPIE 2230 (1994) pp148-159.
Abstract
Research at the DERA, Malvern, has resulted in a series of algorithms
which are capable of yielding focused, undistorted SAR
imagery. Unfortunately these can only be implemented in a fraction of
a percent of real-time on a standard workstation. In parallel with
the algorithm development, therefore, has been research into a
real-time implementation on a parallel computer (the Meiko CS1). This
paper outlines the principles behind the software architecture design
to achieve the desired speed. Processing functions considered include:
initial motion compensation (based on accelerometer data), autofocus
with phase correction, final processing and an intensity segmentation
stage. Real-time processing rates of about 10 MBytes/s are now routinely
achieved. We indicate the compromises between processor power, available
local memory and communications bandwidth needed to achieve real-time
operation. Detailed timings derived from the implementation will be
presented together with a discussion of the manner in which this could
be varied for different SAR configurations.
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