Simulation of Raw Digital Signals Received by Space-Based Synthetic Aperture Radar for use in Jamming Studies

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Authors
  1. Thomson, A.D.
Corporate Authors
Defence Research and Development Canada, Ottawa Research Centre, Ottawa ON (CAN)
Abstract
A simulation of digital signals produced by a space-based Synthetic Aperture Radar (SAR) receiver is developed to provide a source of raw signal data that can be used to assess the vulnerability of space-based SAR to jamming and to investigate protection measures that may allow space-based SAR to operate in a contested electromagnetic environment. Key features of the simulation are a flexible time-domain approach, rotating spheroidal Earth geometry, calculation of absolute signal magnitudes, and the ability to generate large scenes. These are required so that jamming signals with specific quantitative properties (e.g., transmitted power) can be easily introduced into the simulation environment for specific geometries of interest and so that the effects of the jamming can be properly assessed in a quantitative fashion. The simulation uses the metadata of an actual space-based SAR collection to define the geometry for a given case. The image data corresponding to the real SAR collection is used to define the Earth surface reflectivity field that is measured by the simulated space-based SAR. Signal data corresponding to the surface of the earth, radar system noise, and test targets are generated, coherently combined, and converted into digital signals that can be processed using SAR image formation algorithms. An option to decompress and scale real, raw, range-compressed signals, measured by the RADARSAT-2 MODEX mode and combine them with test target signals is also developed. T

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Keywords
Space based Radars;Synthetic Aperture Radar (SAR);signal;modelling & simulations
Report Number
DRDC-RDDC-2018-R297 — Scientific Report
Date of publication
01 Jun 2019
Number of Pages
117
DSTKIM No
CA004962
CANDIS No
810420
Format(s):
Electronic Document(PDF)

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