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52 篇 会议

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检索条件"任意字段=Conference on Radar Sensor Technology XVII"

共 52 条记录，以下是1-10 订阅

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A Mathematical Observation On Synthetic Aperture radar

A Mathematical Observation On Synthetic Aperture Radar

引用

conference on radar sensor technology xvii

作者： Cao, Yufeng Li, Shuxia Lopez, Juan Martinez, Alex Qiao, Zhijun Univ Texas Pan Amer Dept Math Edinburg TX 78539 USA

A general synthetic aperture radar (SAR) signal model is derived based on the Maxwells equation, and three numerical simulations are analyzed and discussed. With this signal model, compressive sensing is applied to ge... 详细信息

ISBN: (纸本)9780819495051

关键词： compressed sensing SAR Maxwell's equations

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Multitone Harmonic radar

Multitone Harmonic Radar

引用

conference on radar sensor technology xvii

作者： Mazzaro, Gregory J. Martone, Anthony F. US Army Res Lab Adelphi MD 20783 USA

ISBN: (纸本)9780819495051

Nonlinear radar exploits the electronic response from a target whose reflected frequencies are different from those transmitted. Reception of frequencies that are not part of the transmitted probe distinguishes the received signal from a linear return produced by clutter and indicates the presence of electronics. Presented in this paper is a type of nonlinear radar that transmits multiple frequencies and listens for a harmonic of these frequencies as well as other frequencies near that harmonic. A laboratory test-bed has been constructed to demonstrate the multitone radar concept. Measurements of nonlinear responses from RF devices probed by multiple tones are reported.

关键词： multitone harmonic radar detection discrimination radio frequency electronics nonlinear response

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GNSS-Based Passive radar Sensing Using Hybrid-Aperture System

GNSS-Based Passive Radar Sensing Using Hybrid-Aperture Syste...

引用

conference on radar sensor technology xvii

作者： Silver, Randy Zhang, Yan (Rockee) Suarez, Hernan Pan, Yu Huang, Yih-Ru Univ Oklahoma IART Norman OK 73072 USA

ISBN: (纸本)9780819495051

A hybrid-aperture radar system is being developed for passive, GNSS-based sensing and imaging missions. Different from previous work, the real aperture (RA) array has excellent cross-range resolution and electronic scanning capability, and synthetic aperture processing is applied for the dimension along the UAV/aircraft flight path. The hybrid aperture thus provides real-time, combined sensing capability and multiple functions. Multi-level signal synchronization and tracking is used to ensure the signal phase coherency and integrity. The advantages of covert radar sensing and reduced onboard computing complexity of this sensor are being demonstrated through experiments.

关键词： GNSS radar Software Defined Radio /radar (SDR)

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Scattering and Imaging of Nonlinearly Loaded Antenna Structures in Half-Space Environments

Scattering and Imaging of Nonlinearly Loaded Antenna Structu...

引用

conference on radar sensor technology xvii

作者： Liao, DaHan US Army Res Lab Adelphi MD USA

ISBN: (纸本)9780819495051

The electromagnetic scattering responses of nonlinearly loaded antenna structures excited by single-tone or multi-tone incident fields are considered in the frequency domain by employing a combination of the method-of-moments and a harmonic balance technique. Subsequently, standoff detection and localization of the scatterers in the presence of a half space is demonstrated with a subspace imaging procedure by exploiting the harmonic scattering responses.

关键词： Computational electromagnetics harmonic balance linear and nonlinear electromagnetic scattering method-of-moments multistatic radar imaging radiowave propagation remote sensing subspace-based imaging

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New Distributed radar technology Based on UAV or UGV Application

New Distributed Radar Technology Based on UAV or UGV Applica...

引用

conference on radar sensor technology xvii

作者： Molchanov, Pavlo A. Contarino, Vincent M. AMPAC Inc Lexington Pk MD 20653 USA

ISBN: (纸本)9780819495051

Regular micro and nano radars cannot provide reliable tracking of low altitude low profile aerial targets in urban and mountain areas because of reflection and re-reflections from buildings and terrain. They become visible and vulnerable to guided missiles if positioned on a tower or blimp. Doppler radar cannot distinguish moving cars and small low altitude aerial targets in an urban area. A new concept of pocket size distributed radar technology based on the application of UAV (Unmanned Air Vehicles), UGV (Unmanned Ground Vehicles) is proposed for tracking of low altitude low profile aerial targets at short and medium distances for protection of stadium, camp, military facility in urban or mountain areas.

关键词： Distributed radar technology directional antenna array low profile low altitude targets tracking UAV UGV urban mountain area

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Cognitive Processing for Nonlinear radar

Cognitive Processing for Nonlinear Radar

引用

conference on radar sensor technology xvii

作者： Martone, Anthony Ranney, Kenneth Hedden, Abigail Mazzaro, Gregory McNamara, David Army Res Lab Adelphi MD 20783 USA

ISBN: (纸本)9780819495051

An increasingly cluttered electromagnetic environment (EME) is a growing problem for radar systems. This problem is becoming critical as the available frequency spectrum shrinks due to growing wireless communication device usage and changing regulations. A possible solution to these problems is cognitive radar, where the cognitive radar learns from the environment and intelligently modifies the transmit waveform. In this paper, a cognitive nonlinear radar processing framework is introduced where the main components of this framework consist of spectrum sensing processing, target detection and classification, and decision making. The emphasis of this paper is to introduce a spectrum sensing processing technique that identifies a transmit-receive frequency pair for nonlinear radar. It will be shown that the proposed technique successfully identifies a transmit-receive frequency pair for nonlinear radar from data collected from the EME.

关键词： cognitive radar radar cognitive radio spectrum sensing nonlinear radar

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FPGA Implementation of a Software-Defined radar Processor

FPGA Implementation of a Software-Defined Radar Processor

引用

conference on radar sensor technology xvii

作者： Suarez, Hernan Zhang, Yan Rockee Univ Oklahoma Sch Elect & Comp Engn Adv Radar Res Ctr ARRC Intelligent Aerosp Radar Team IART Norman OK 73072 USA

ISBN: (纸本)9780819495051

A unified digital pulse compression processor is introduced as a radar-application-specific-processor (RASP) architecture for the next generation of adaptive radar. Based on traditional pulse compression matched filter and correlation receiver, the processor integrates specific designs to handle waveform diversities, which includes random noise waveforms, as well as digital transceiver self-reconfiguration for adaptive radars. Initial prototype of this processor is implemented with the latest Xilinx FPGA device and tested with an RF spaceborne radar transceiver testbed. Initial validation results show the effectiveness of real-time processing and engineering concepts.

关键词： waveform diversity random noise waveform software-defined radar signal processor FPGA

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Emulation of Forward-Looking radar technology for Threat Detection in Rough Terrain Environments: A Scattering and Imaging Study

Emulation of Forward-Looking Radar Technology for Threat Det...

引用

conference on radar sensor technology xvii

作者： Liao, DaHan Dogaru, Traian US Army Res Lab Adelphi MD USA

ISBN: (纸本)9780819495051

Large-scale, full-wave modeling of multistatic target imaging in a rough ground environment is described. The emulation methodology employs a parallelized three-dimensional "near-field" finite-difference time-domain algorithm in characterizing the electromagnetic scattering from the ground surface and buried and on-surface targets in the form of landmines and unexploded ordnances;subsequent focusing of the scattered fields into an image is obtained with the time-reversal technique. The emphasis of this study is on investigating the detectability of discrete ground targets in the presence of distributed variable ground clutter as relevant to performance prediction for ultra-wideband forward-looking radar applications.

关键词： Computational electromagnetics finite-difference time-domain method forward-looking radar ground surface electromagnetic scattering landmine detection multistatic radar imaging time-reversal imaging

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Three-Dimensional radar Imaging of Buildings Based on Computer Models

Three-Dimensional Radar Imaging of Buildings Based on Comput...

引用

conference on radar sensor technology xvii

作者： Dogaru, Traian Liao, DaHan Le, Calvin US Army Res Lab Adelphi MD 20783 USA

ISBN: (纸本)9780819495051

This paper describes the study of a through-the-wall radar system for three-dimensional (3-D) building imaging, based on computer simulations. Two possible configurations are considered, corresponding to an airborne spotlight and a ground-based strip-map geometry. The paper details all the steps involved in this analysis: creating the computational meshes, calculating the radar signals scattered by the target, forming the radar images, and processing the images for visualization and interpretation. Particular attention is given to the scattering phenomenology and its dependence on the system geometry. The images are created via the backprojection algorithm and further processed using a constant false-alarm rate (CFAR) detector. We discuss methods of 3-D image visualization and interpretation of the results.

关键词： Sensing through-the-wall radar synthetic aperture radar computational electromagnetics

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Tomographic imaging with ultra-wideband noise radar using time-domain data

Tomographic imaging with ultra-wideband noise radar using ti...

引用

conference on radar sensor technology xvii

作者： Shin, Hee Jung Narayanan, Ram M. Rangaswamy, Muralidhar Penn State Univ University Pk PA 16802 USA Air Force Res Lab Wright Patterson AFB OH 45433 USA

ISBN: (纸本)9780819495051

This paper investigates the feasibility of using a noise waveform in an ultra-wideband (UWB) radar system for two-dimensional tomographic imaging of a stationary object with a multistatic tomographic geometry. Multiple UWB transmitters and receivers are positioned along each side of the imaging area. We perform several numerical simulations in time-domain, and the successful imaging of the target is achieved by visual inspection of the formed images.

关键词： Tomographic imaging back projection imaging ultra-wideband noise radar system

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