syntheticappradar-an-203

syntheticappradar-an-203 - R ealtime Synthetic Aperture...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Realtime Synthetic Aperture Radar Processing on the RACE ® Multicomputer Application Note 203.0 TARGET AUDIENCE System design engineers who are tasked with designing realtime SAR processing systems using the RACE Multicomputer. Software engineers who desire to understand SAR signal processing algorithms and their implementation on the RACE Multicomputer. ABSTRACT This note develops relationships for predicting the memory and computational requirements of realtime SAR processing as a function of radar application parameters such as resolution, swath width, platform velocity, radar wavelength and range, for the simplest case of the range/Doppler stripmap algorithm. No prior knowledge of SAR processing is assumed. Using these general results to determine the processing requirements of a given application, the process of mapping the range/Doppler stripmap SAR processing algorithm onto a RACE Multicomputer is described. This mapping process includes distributing the total processing load among the individual CEs in the multicomputer so as to balance the computational load over all CEs as equally as possible and determining the memory required by each CE. An example of this mapping process is then illustrated for the case of a typical SAR scenario. RACE hardware features that are especially relevant to SAR processing include efficient interprocessor communications and a chained-DMA capability on each CE to facilitate "corner-turning" operations. Corresponding software features include Mercury's Parallel Applications System (PAS) to facilitate the distribution of the SAR processing algorithm over multiple processors. The application note is presented in overhead format with speaker notes. Authored by: Thomas Einstein, Systems Engineering REVISION HISTORY Revision # Description 203.0 Creation RACE and the RACE logo are registered trademarks of Mercury Computer Systems, Inc. Mercury Computer Systems, Inc. believes this information sheet is accurate as of its publication date. Mercury Computers, Inc. is not responsible for any inadvertent errors. This information is subject to change without notice.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Page 1 SAR Processing with the RACE Multi-computer 1 6/1/96 Synthetic Aperture Radar Processing on the RACE Multi-computer
Background image of page 2
Page 2 SAR Processing with the RACE Multi-computer 2 6/1/96 Outline of Presentation » Application: Synthetic Aperture Radar (SAR) Static Description: SAR Signal Processing Dynamic Description: Real-Time SAR Signal Processing Resource Requirements: Processing and Memory Mapping SAR Computations onto RACE
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Page 3 SAR Processing with the RACE Multi-computer 3 6/1/96 Introduction to SAR (Synthetic Aperture Radar) Generates High-resolution aerial photograph-like images – Image Resolution ranges from (50 x 50) m down to (0.5 x 0.5) m Applications (both Military and Commercial) – Ground Surveillance (all weather; day or night) – Terrain Mapping – Object Imaging (Inverse SAR / ISAR) Requires relative motion between radar platform and area being imaged.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/02/2011 for the course EDU 101 taught by Professor Billy during the Spring '11 term at Rio Grande.

Page1 / 64

syntheticappradar-an-203 - R ealtime Synthetic Aperture...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online