Highly Resolved Synthetic Aperture Radar with Beam Steering

The present work deals with a highly resolved radar with a synthetic aperture (synthetic aperture radar - SAR), which uses a beam steering to improve performance. The first part of this work deals with the influence of various effects occurring in the hardware of the High-Resolution Wide-Swath SAR (HRWS SAR) system. A special focus was set to single bit quantization in multi-channel receiver. The second part of this work describes SAR processors for Sliding Spotlight mode

Highly Resolved Synthetic Aperture Radar with Beam Steering

Diese Arbeit beschäftigt sich mit einem hochauflösenden Radar mit synthetischer Apertur. Der erste Teil dieser Arbeit beschreibt mögliche Auswirkungen verschiedener Effekte in dem Empfänger des High-Resolution Wide-Swath SAR (HRWS SAR) Systems. Darüber hinaus wird ein Konzept zu Reduktion von Quantisierungsbits in Systemen mit mehreren Empfangskanälen untersucht. Der zweite Teil der Arbeit betrifft die Datenverarbeitung eines hochauflösenden SAR-Systems in Sliding Spotlight Mode

Noty o książkach

Publikacja dofinansowana przez katedry literaturoznawcze Instytutu Filologii Polskiej Uniwersytetu Łódzkiego

One-Bit Quantization for Synthetic Aperture Radar with DBF

In conventional Synthetic Aperture Radar (SAR) the azimuth resolution and the swath width are two parameters that can not be improved simultaneously. A new concept called High Resolution Hide-Swath (HRWS) has been designed to loose the dependence between those two contradicting parameters. For this purpose Digital Beam-Forming (DBF) algorithms are implemented both in azimuth and in elevation direction. A simulation have been conducted to estimate the performance in elevation of a SAR system with DBF and possible nonlinearities and distortions in receive front-end. The interest of the research is focused on the performance of a system with high number of receive channels. One of the aspects of the simulation is low bit quantization. In this paper the results form HRWS SAR simulation and measurements results of the HRWS demonstrator with one bit quantization are compared

One-Bit Quantization for Synthetic Aperture Radar with DBF

In conventional Synthetic Aperture Radar (SAR) the azimuth resolution and the swath width are two parameters that can not be improved simultaneously. A new concept called High Resolution Hide-Swath (HRWS) has been designed to loose the dependence between those two contradicting parameters. For this purpose Digital Beam-Forming (DBF) algorithms are implemented both in azimuth and in elevation direction. A simulation have been conducted to estimate the performance in elevation of a SAR system with DBF and possible nonlinearities and distortions in receive front-end. The interest of the research is focused on the performance of a system with high number of receive channels. One of the aspects of the simulation is low bit quantization. In this paper the results form HRWS SAR simulation and measurements results of the HRWS demonstrator with one bit quantization are compared

Hybrid Strip-map/SpotlightMode Processing based on Chirp Scaling Processing

The hybrid mode provides radar images with resolution better than in stripmap mode with swath length longer than in the spotlight mode. In the paper described is a processor for hybrid radar data. The algorithm bases on the chirp scaling algorithm. In order to process the hybrid mode data an azimuth filter is applied before the chirp scaling algorithm