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Author : Ossowska, Alicja
Publisher : KIT Scientific Publishing
Page : 258 pages
File Size : 50,9 Mb
Release : 2015-02-12
Category : Electronic
ISBN : 9783731503156
Author : Alicja Ossowska
Publisher : Unknown
Page : 252 pages
File Size : 46,6 Mb
Release : 2020-10-09
Category : Technology & Engineering
ISBN : 1013283945
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. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Author : May Abo Elhassan
Publisher : GRIN Verlag
Page : 276 pages
File Size : 50,6 Mb
Release : 2022-07-07
Category : Technology & Engineering
ISBN : 9783346675286
Doctoral Thesis / Dissertation from the year 2020 in the subject Electrotechnology, , language: English, abstract: In this thesis, a PSO optimization algorithm is applied using a developed technique to synthesize the radiation patterns required for high-resolution land imaging SAR and satellite communications using planar rectangular or concentric circular arrays. The goal of the PSO algorithm is to get the excitation coefficients of the array elements, which are, then, Microstrip patch antennas with linear or circular polarization are proposed to construct the synthesized-beam arrays required for the considered application. A wide band rectangular patch antenna with U-slot is proposed for planar arrays with linear polarization. A square patch antenna with four truncated corners and four axial slots is designed for planar rectangular and circular arrays. Finally, a square patch antenna with two L-shaped slots inserted at diagonally opposite corners is designed for planar concentric circular arrays. Turnstile arrays of either dipole elements or U-slotted microstrip patch antennas excited with circulating phase shift are proposed to construct planar arrays with circular polarization for land-imaging SAR systems and satellite communications. Synthetic Aperture Radar (SAR) is used for remote sensing to create two-dimensional images of land covers on the earth’s surface. Such a land-imaging system has a great importance in many civilian and military applications. The SAR uses the radar antenna to scan a ground area to provide microwave images with fine spatial resolution. The SAR is typically mounted on an aircraft or spacecraft, and usually has a form of side-looking radar. It uses the Doppler and time delay information of the ground reflected wave to generate a two-dimensional image with the desired azimuth resolution (direction of motion) and range resolution (normal to the direction of motion), respectively. The SAR operation requires a physical antenna of radiation pattern with foot print of high aspect ratio and a mechanism capable of achieving beam steering and beam shaping. The SAR antenna array should be rigid, planar, deployable, and as lightweight as possible. A side-looking SAR system requires an antenna with a flat-topped beam pattern in the plane of the azimuth direction and a cosecant-squared beam shape in the plane of the range direction. For satellite communications with the ground stations, an isoflux beam is required for uniform coverage and continuity during the communication session.
Author : Abadpour, Sevda
Publisher : KIT Scientific Publishing
Page : 194 pages
File Size : 43,7 Mb
Release : 2023-11-20
Category : Electronic
ISBN : 9783731513162
During the evolvement of autonomous driving technology, obtaining reliable 3-D environmental information is an indispensable task in approaching safe driving. The operational behavior of automotive radars can be precisely evaluated in a virtual test environment by modeling its surrounding, specifically vulnerable road users (VRUs). Such a realistic model can be generated based on the radar cross section (RCS) and Doppler signatures of a VRU. Therefore, this work proposes a high-resolution RCS measurement technique to determine the relevant scattering points of different VRUs.
Author : Diewald, Axel
Publisher : KIT Scientific Publishing
Page : 190 pages
File Size : 51,5 Mb
Release : 2023-08-15
Category : Electronic
ISBN : 9783731512967
Radar target simulators (RTSs) deceive a radar under test (RuT) by creating an artificial environment consisting of virtual radar targets. In this work, new techniques are presented that overcome the rasterization deficiency of current RTS systems and enable the generation of virtual targets at arbitrary high-precision positions. This allows for continuous movement of the targets and thus a more credible simulation environment.
Author : Jianyu Yang
Publisher : Elsevier
Page : 342 pages
File Size : 52,5 Mb
Release : 2022-01-20
Category : Technology & Engineering
ISBN : 9780128224601
Bistatic Synthetic Aperture Radar covers bistatic SAR in a comprehensive way, presenting theory, method and techniques, as well as the most recent research and near-future applications. The book begins with imaging principles and characteristics of monostatic SAR, moving on to common and novel problems before presenting theories, methods and experimental system design. The title presents the design of experimental systems, research results and experimental verification. It gives key knowledge from a leading research group, including one of the earliest bistatic side-looking SAR experiments and the first bistatic forward-looking SAR experiment in the world that used two aircraft. Six chapters cover imaging theory, imaging algorithms, parameter estimation, motion compensation, synchronization and experimental verification. The book describes physical concepts simply and clearly and provides concise mathematical derivations. Presents comprehensive theory and methods for bistatic SAR, including the design of experimental systems and verification Considers different configurations, including translational variant bistatic SAR and bistatic forward-looking SAR Gives insights based on a world-leading research program into bistatic SAR, including practical tips on theory and method Covers novel experiments, including the first bistatic forward-looking SAR experiment using two aircraft Offers researchers clear descriptions of physical concepts and concise mathematical derivations to help master bistatic SAR
Author : Visentin, Tristan
Publisher : KIT Scientific Publishing
Page : 190 pages
File Size : 41,6 Mb
Release : 2019-04-10
Category : Electronic
ISBN : 9783731508885
Author : Ninos, Alexandros
Publisher : KIT Scientific Publishing
Page : 164 pages
File Size : 43,8 Mb
Release : 2022-10-27
Category : Technology & Engineering
ISBN : 9783731512257
The aim of this work is the development of a Radar system for consumer applications. It is capable of tracking multiple people in a room and offers a touchless human-machine interface for purposes that range from entertainment to hygiene.
Author : John J. Kovaly
Publisher : Artech House Publishers
Page : 366 pages
File Size : 43,5 Mb
Release : 1976
Category : Technology & Engineering
ISBN : UOM:39015006410529
Author : Girma, Mekdes
Publisher : KIT Scientific Publishing
Page : 178 pages
File Size : 46,5 Mb
Release : 2019-11-21
Category : Technology & Engineering
ISBN : 9783731509387
Author : Sit, Yoke Leen
Publisher : KIT Scientific Publishing
Page : 262 pages
File Size : 45,8 Mb
Release : 2017-04-10
Category : Electronic
ISBN : 9783731505990
Author : Wen-Qin Wang
Publisher : CRC Press
Page : 470 pages
File Size : 42,7 Mb
Release : 2017-07-12
Category : Technology & Engineering
ISBN : 9781351832366
Synthetic aperture radar (SAR) is a well-known remote sensing technique, but conventional single-antenna SAR is inherently limited by the minimum antenna area constraint. Although there are still technical issues to overcome, multi-antenna SAR offers many benefits, from improved system gain to increased degrees-of-freedom and system flexibility. Multi-Antenna Synthetic Aperture Radar explores the potential and challenges of using multi-antenna SAR in microwave remote sensing applications. These applications include high-resolution imaging, wide-swath remote sensing, ground moving target indication, and 3-D imaging. The book pays particular attention to the signal processing aspects of various multi-antenna SAR from a top-level system perspective. Explore Recent Extensions of Synthetic Aperture Radar Systems The backbone of the book is a series of innovative microwave remote sensing approaches developed by the author. Centered around multi-antenna SAR imaging, these approaches address specific challenges and potential problems in future microwave remote sensing. Chapters examine single-input multiple-output (SIMO) multi-antenna SAR, including azimuth and elevation multi-antenna SAR, and multiple-input multiple-output (MIMO) SAR. The book details the corresponding system scheme, signal models, time/phase/spatial synchronization methods, and high-precision imaging algorithms. It also investigates their potential applications. Introductory Tutorials and Novel Approaches in Multi-Antenna SAR Imaging Rigorous and self-contained, this is a unique reference for researchers and industry professionals working with microwave remote sensing, SAR imaging, and radar signal processing. In addition to novel approaches, the book also presents tutorials that serve as an introduction to multi-antenna SAR imaging for those who are new to the field.
Author : Bhutani, Akanksha
Publisher : KIT Scientific Publishing
Page : 254 pages
File Size : 41,8 Mb
Release : 2019-10-17
Category : Technology & Engineering
ISBN : 9783731509455
Author : Jalilvand, Malyhe
Publisher : KIT Scientific Publishing
Page : 184 pages
File Size : 44,6 Mb
Release : 2017-08-01
Category : Electronic
ISBN : 9783731506645
Author : Kowalewski, Jerzy
Publisher : KIT Scientific Publishing
Page : 182 pages
File Size : 52,9 Mb
Release : 2020-06-08
Category : Technology & Engineering
ISBN : 9783731509974