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

共 39 条记录，以下是1-10 订阅

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radar Doppler processing with nonuniform PRF 22

Radar Doppler processing with nonuniform PRF

引用

conference on radar sensor technology xxii

作者： Doerry, A. W. Sandia Natl Labs POB 5800MS 0519 Albuquerque NM 87185 USA

ISBN: (纸本)9781510617780

Conventional signal processing to estimate radar Doppler frequency often assumes uniform pulse/sample spacing. This is typically more for the convenience of the processing. More recent performance enhancements in processor capability allow optimally processing nonuniform pulse/sample spacing, thereby overcoming some of the baggage that attends uniform sampling, such as Doppler ambiguity and SNR losses due to sidelobe control measures.

关键词： radar PRF Doppler nonuniform

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Measuring channel balance in multi-channel radar receivers 22

Measuring channel balance in multi-channel radar receivers

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conference on radar sensor technology xxii

作者： Bickel, D. L. Doerry, A. W. Sandia Natl Labs POB 5800MS 0519 Albuquerque NM 87185 USA

ISBN: (纸本)9781510617780

radar receivers with multiple receive channels generally strive to make the receive channels as ideal as possible, and as alike as possible. This is done via prudent hardware design, and system calibration. Towards that end, we require a quality metric for ascertaining the goodness of a radar channel, and its match to sibling channels. We propose a relevant and useable metric to do just that.

关键词： radar multi-channel balance metric

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Analysis of Transmission and Polarization Optimization of Counter-Small UAS (C-SUAS) radar and Noise Jamming 22

Analysis of Transmission and Polarization Optimization of Co...

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conference on radar sensor technology xxii

作者： Thumann, Charles Zhang, Yan (Rockee) Huang, Yih-Ru Dyer, John Univ Oklahoma IART Sch Elect & Comp Engn Norman OK 73019 USA Univ Oklahoma Adv Radar Res Ctr Norman OK 73019 USA

ISBN: (纸本)9781510617780

This study summarizes recent progress on the Drone Detection and Mitigation radar (DDMR) concept, with focus on polarimetric radar signature of small UAS at different frequency bands, micro-Doppler impact, and the optimization of sweeping noise jamming solution of the communication links. New results of measurements are presented and effort to achieve the optimal effectiveness of the sweep jamming is summarized.

关键词： Drone Detection and Mitigation radar (DDMR) sweep jamming hit rate RCS polarimetry

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Data Quality Analysis and Enhancement of an Airborne Weather radar for Scientific and Multi-Mission Operations 22

Data Quality Analysis and Enhancement of an Airborne Weather...

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conference on radar sensor technology xxii

作者： Nepal, Ramesh Zhang, Yan Rockee Zhang, Guifu Ryzhkov, Alexander Blake, William Univ Oklahoma Norman OK 73019 USA Garmin Int Inc Garmin Aviat Weather Radar Grp Olathe KS 66062 USA

ISBN: (纸本)9781510617780

This paper describes the signal processing framework for scientific application of an airborne radar originally used for aviation hazard monitoring. The specific radar being developed is the "PARADOX" radar, which is based on the GSX-70 and GSX-80 radar system hardware from Garmin International. The processing framework is designed to enhance the resolution, improve signal processing, and achieve "research-grade" data quality control for both application domains. The processing framework is also applicable to other multi-mission radars that seek optimal weather measurement performance using hardware designed for other functions. A validation method of the processing framework through case analysis and comparison with ground-based radar measurements is described.

关键词： Airborne Weather radar Data Quality Aviation Multi-Mission

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Signal Processing Technique for Spectrally RF Congested and Restricted Environments Using the US Army Research Laboratory Stepped-Frequency Ultra-Wideband radar 22

Signal Processing Technique for Spectrally RF Congested and ...

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conference on radar sensor technology xxii

作者： Nguyen, Lam H. US Army Res Lab Adelphi MD 20783 USA

ISBN: (纸本)9781510617780

The U.S. Army Research Laboratory (ARL) recently designed and tested a new prototype radar, the Spectrally Agile Frequency-Incrementing Reconfigurable (SAFIRE) radar system, based on a stepped-frequency architecture to address challenges when operating under spectrally congested and spectrally restricted RF environments. SAFIRE is a vehicle-based, low-frequency, ultra-wideband (UWB) synthetic aperture radar (SAR) with frequencies spanning from 300 MHz to 2 GHz, where many frequency bands within this spectrum are either employed by other systems (congested RF environment) or prohibited (spectrally restricted RF environment).

关键词： stepped-frequency radar (SFR) ultra-wideband radar (UWB) synthetic aperture radar (SAR) radio-frequency interference (RFI) spectral recovery missing data

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Aerostat Borne ISAR Autofocus Imaging Based on Phase Retrieval 22

Aerostat Borne ISAR Autofocus Imaging Based on Phase Retriev...

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conference on radar sensor technology xxii

作者： Shi, Hongyin Xia, Saixue Qiao, Zhijun G. Yanshan Univ Sch Informat Sci & Engn Qinhuangdao Peoples R China Univ Texas Rio Grande Valley Sch Math & Stat Sci Edinburgh Midlothian Scotland

ISBN: (纸本)9781510617780

Compared with the ground-based Inverse Synthetic Aperture radar (ISAR), although there are many advantages in the aerostat borne ISAR, but its radar platform is a degree of instability, which will interfere with ISAR imaging. For aerostat borne ISAR autofocus imaging, a high-resolution imaging algorithm based on phase retrieval principle is proposed in this paper. Theoretical analysis shows that the translational motion or vibration of the radar platform does not affect the magnitude of ISAR echo. Therefore, phase retrieval algorithm can eliminate the instability of the radar platform. Compared with the traditional algorithms, the results show that the proposed method in this paper can obtain better imaging results without estimating the motion parameters of the radar platform.

关键词： Inverse Synthetic Aperture radar (ISAR) Aerostat Autofocus imaging Phase retrieval

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Application of the Operator Current to Polarization radar and Three-Dimensional Rotations 22

Application of the Operator Current to Polarization Radar an...

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conference on radar sensor technology xxii

作者： Gray, John E. Addison, Stephen R. Naval Surface Warfare Ctr Sensor Technol Dept Code B-31 Dahlgren VA 22448 USA Univ Cent Arkansas Dept Phys & Astron Conway AR 72035 USA

ISBN: (纸本)9781510617780

In this paper, the concept of a post-selection operator current is introduced that is applicable to remote sensing physics as well as quantum mechanics. The post-selection operator (or cross-correlation for classical applications) current density (PSOCD) is defined in this paper, which also allows an operator current density to be. Both polarization operators and three dimensional operators have explicit Lie algebras, which impose lead to an algebra for the current which we discuss. When there is an evolution equation for signal such as the ambiguity function, the time evolution of a postselected operator can be characterized. The underlying geometry that is implicit with this evolution is also applicable to other evolutionary/transport equations such as the Fokker-Planck equation, Brownian motion, and other equations that are used to model noise.

关键词： Pancharatnam phase sensor operator current weak measurement Aharonov weak energy

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Coherent 24 GHz FMCW radar system for micro-Doppler studies 22

Coherent 24 GHz FMCW radar system for micro-Doppler studies

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conference on radar sensor technology xxii

作者： Rahman, Samiur Robertson, Duncan A. Univ St Andrews SUPA Sch Phys & Astron St Andrews KY16 9SS Fife Scotland

ISBN: (纸本)9781510617780

This paper presents the hardware design of a coherent 24 GHz radar system developed at the University of St Andrews to obtain micro-Doppler data. The system is based on the Analog Devices EV-radar-MMIC2 evaluation board which is based around a chipset of three integrated circuits: a two channel transmitter, a four channel receiver and a fractional-N frequency synthesizer. The evaluation board is combined with a number of other components to enable coherent operation with a PC-based data acquisition card and to boost the output power to increase the operational range. Three identical custom-made smooth-walled conical horn antennas for transmit and co-and cross-polar receive signals were designed and built for the radar system. It is shown that the performance of these high gain (24.5 dBi) antennas agrees extremely well with the design simulations. Finally, field trial results comprising human, bird and drone micro-Doppler data are shown to validate the system performance.

关键词： Micro-Doppler radar K-band FMCW

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Particle Swarm Optimization for radar Binary Phase Code Selection 22

Particle Swarm Optimization for Radar Binary Phase Code Sele...

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conference on radar sensor technology xxii

作者： Li, Bingcheng Lockheed Martin MST Owego 1801 State Route 17CMD0315 Owego NY 13827 USA

ISBN: (纸本)9781510617780

Binary phased codes have many applications in communication and radar systems. These applications, including spread spectrum communication and low probability of intercept radar, require low sidelobes and long code lengths. Many techniques for finding long binary phased codes with low sidelobes have been investigated in literatures. These techniques include exhaust search, neural network, and evolutionary methods, and they all have high computational cost. In this paper, we propose particle swarm optimization (PSO) to select long low sidelobe binary phased codes with reasonable computational cost. We investigate two techniques for initialization: random number approach and linear chirp approach and show that linear chirp initialization performs significantly better than random number approach. By implementing the proposed techniques, we demonstrate that PSO approach with linear chirp initialization can find binary codes with sidelobes equal to or lower than the neural network and genetic algorithm techniques in literatures.

关键词： Binary data Particle swarm optimization Particles Neural networks radar Genetic algorithms Evolutionary algorithms Fluctuations and noise Genetics Telecommunications

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A Thorough Analysis of Various Geometries for a Dynamic Calibration Target for Through-wall and Through-rubble radar 22

A Thorough Analysis of Various Geometries for a Dynamic Cali...

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conference on radar sensor technology xxii

作者： Harner, Michael J. Narayanan, Ram M. Jendzurski, John R. Paulter, Nicholas G. Penn State Univ Dept Elect Engn University Pk PA 16802 USA NIST 100 Bur Dr Gaithersburg MD 20899 USA

ISBN: (纸本)9781510617780

It is common practice to use a metal conducting sphere for radar calibration purposes. The aspect-independence of a sphere allows for a more accurate and repeatable calibration of a radar than using a nonspherical calibration artifact. In addition, the radar cross section (RCS) for scattering spheres is well-known and can be calculated fairly easily using far field approximations. For Doppler radar testing, it is desired to apply these calibration advantages to a dynamic target. To accomplish this, a spherical polyhedron is investigated as the calibration target. This paper analyzes the scattering characteristics for various spherical polyhedral geometries. Each geometry is analyzed at 3.6 GHz in two states: contracted and expanded. For calibration purposes, it is desired that the target have a consistent monostatic RCS over the entirety of its surface. The RCS of each spherical polyhedral is analyzed and an optimized geometry, for calibration purposes, is chosen.

关键词： RCS calibration monostatic through-wall through-rubble human respiration heartbeat radar

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