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

共 24 条记录，以下是1-10 订阅

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Motion measurement impact on synthetic aperture radar (SAR) geolocation 25

Motion measurement impact on synthetic aperture radar (SAR) ...

引用

conference on radar sensor technology xxv

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

ISBN: (纸本)9781510643222

Often a crucial exploitation of a Synthetic Aperture radar (SAR) image requires accurate and precise knowledge of its geolocation, or at least the geolocation of a feature of interest in the image. However, SAR, like all radar modes of operation, makes its measurements relative to its own location or position. Consequently, it is crucial to understand how the radar's own position and motion impacts the ability to geolocate a feature in the SAR image. Furthermore, accuracy and precision of navigation aids like GPS directly impact the goodness of the geolocation solution.

关键词： radar SAR geolocation motion measurement

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Bird Micro-Doppler Simulation for Bird versus UAV Recognition 25

Bird Micro-Doppler Simulation for Bird versus UAV Recognitio...

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conference on radar sensor technology xxv

作者： Tahmoush, Dave Johns Hopkins Appl Phys Lab 11100 Johns Hopkins Rd Laurel MD 20723 USA

ISBN: (纸本)9781510643222

Birds and UAVs have similar radar Cross Section and speed, making birds confusers when trying to detect and track UAVs. Birds can have micro-Doppler features in their signatures, but collecting bird data at multiple angles and directions can be expensive. An alternative is using micro-Doppler simulations of birds. Accurate simulations are made of a single bird, but can also be used to produce flocks of birds as potential confusers. The bird simulation was analyzed for its similarity to drone or UAV rotor radar micro-Doppler. Using these simulations, the effect of the flight angle relative to the radar beam was analyzed for the amount of observable micro-Doppler, allowing the analysis of track angles and the enhanced probability of a false alarm from a bird. This paper shows the differences in bird micro-Doppler returns simulated over angles and compares them to a micro-Doppler model of a UAV rotor.

关键词： Micro-Doppler Bird UAV radar

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Comments on rendering synthetic aperture radar (SAR) images 25

Comments on rendering synthetic aperture radar (SAR) images

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conference on radar sensor technology xxv

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

ISBN: (纸本)9781510643222

Once Synthetic Aperture radar (SAR) images are formed, they typically need to be stored in some file format which might restrict the dynamic range of what can be represented. Thereafter, for exploitation by human observers, the images might need to be displayed in a manner to reveal the subtle scene reflectivity characteristics the observer seeks, which generally requires further manipulation of dynamic range. Proper image scaling, for both storage and for display, to maximize the perceived dynamic range of interest to an observer depends on many factors, and an understanding of underlying data characteristics. While SAR images are typically rendered with grayscale, or at least monochromatic intensity variations, color might also be usefully employed in some cases. We analyze these and other issues pertaining to SAR image scaling, dynamic range, radiometric calibration, and display.

关键词： radar SAR image scaling

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Symbolic Dynamics for radar Target Maneuver Detection 25

Symbolic Dynamics for Radar Target Maneuver Detection

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conference on radar sensor technology xxv

作者： Singerman, Paul G. O'Rourke, Sean M. Narayanan, Ram M. Rangaswamy, Muralidhar Penn State Univ University Pk PA 16802 USA AFRL RYAP Air Force Res Lab Wright Patterson AFB OH 45433 USA AFRL RYMF Air Force Res Lab Wright Patterson AFB OH 45433 USA

ISBN: (纸本)9781510643222

In radar target tracking, knowledge of the true dynamics of target motion is paramount for accurate state estimates. In this paper, we propose a method of target maneuver detection utilizing symbolic dynamics. We demonstrate its ability to compete with other commonly used maneuver detectors. This is done through simulations performing target maneuver detection.

关键词： radar symbolic dynamics maneuver detection target tracking information elasticity

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Moving target S-Band radar data for Doppler and micro-Doppler analysis using a scale-model helicopter measured in a 100GHz compact radar range 25

Moving target S-Band radar data for Doppler and micro-Dopple...

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conference on radar sensor technology xxv

作者： Goyette, Thomas M. Dickinson, Jason DeMartinis, Guy Gatesman, Andrew Molhoek, Charles Univ Massachusetts Lowell 175 Cabot StSuite 130 Lowell MA 01854 USA US Army Natl Ground Intelligence Ctr 2055 Boulders Rd Charlottesville VA 22911 USA

ISBN: (纸本)9781510643222

Generation of moving target (Doppler and micro-Doppler) radar data on a scale-model helicopter with an arbitrary flight path is described. Fully-polarimetric micro-Doppler radar signatures of a 1/35th scale helicopter at S-Band were measured using a 100GHz compact range and are examined under several different situations. The motion of the rotor and blades are analyzed using standard range-doppler spectrograms. In particular, the effect of radial motion toward or away from the radar is considered and the consequences this motion will have on the range/doppler spectrogram of the radar data. It is found that a helicopter exhibiting no radial velocity will experience a degeneracy of signals from the rotation of the helicopter blades. This degeneracy is lifted when a non-zero radial motion is experienced. The effect of varying the radar pulse repetition frequency will be examined.

关键词： Scale Modeling Compact Range radar Micro-Doppler Moving Target Helicopter

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Sudoku based phase-coded radar waveforms 25

Sudoku based phase-coded radar waveforms

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conference on radar sensor technology xxv

作者： Munson, Nicholas R. Bufler, Travis D. Narayanan, Ram M. Penn State Univ Dept Elect Engn University Pk PA 16802 USA Penn State Appl Res Lab State Coll PA 16801 USA

ISBN: (纸本)9781510643222

radar waveform design is a long standing area of interest and research in the radar community. Recently, radar waveform design has been paired with Sudoku, a logic puzzle that has been popular worldwide since the 1980s. The combination of the two has spurred a new area of radar research: Sudoku based radar waveform design. In this paper, we compare Sudoku based Multicarrier Phase-Coded (MCPC) signals to both Costas codes and random codes for different transmitted pulse structures. We provide computational results in the form of statistical analysis for the autocorrelation function and analytical ambiguity function analysis, as well as measurements of the Peak Side Lobe Level (PSL) of their Autocorrelation Function (ACF). We then assess the closeness of the resulting ambiguity function to the ideal thumbtack response.

关键词： Sudoku phase-coded Multicarrier Phase-Coded MCPC ambiguity function waveform design

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Rotorcraft-borne 3-D forward-looking MIMO SAR autofocusing 25

Rotorcraft-borne 3-D forward-looking MIMO SAR autofocusing

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conference on radar sensor technology xxv

作者： Ren, Jiaying Li, Jian Nguyen, Lam H. Univ Florida Dept Elect & Comp Engn Gainesville FL 32611 USA US Army Res Lab RF Signal Proc & Modeling Branch Adelphi MD 20783 USA

ISBN: (纸本)9781510643222

This paper considers the autofocusing problem for a rotorcraft-borne forward-looking multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) system. Autofocusing is critically important for forward-looking MIMO SAR imaging, since the radar position errors due to the limited precision of navigation systems can severely degrade the imaging quality. In this paper, we propose a novel autofocusing method to address the radar position errors, resulting from both translational and rotational motion errors, for forward-looking MIMO SAR imaging. The effectiveness and efficiency of the proposed autofocusing algorithm are demonstrated by using several numerical experiments.

关键词： Rotorcraft-borne forward-looking multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) translational and rotational motion errors autofocusing motion compensation SAR imaging

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Time-Frequency Manifold Representation for Separating and Classifying Frequency Modulation Signals 25

Time-Frequency Manifold Representation for Separating and Cl...

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conference on radar sensor technology xxv

作者： Li, Bing C. Lockheed Martin RMS Owego 1801 State Route 17CMD0315 Owego NY 13827 USA

ISBN: (纸本)9781510643222

In high density communication and radar environments, radio frequency (RF) signal processing for receivers faces significant challenges. Receivers may receive the overlapped or pulse-on-pulse (POP) RF signals transmitted by cochannel and co-site RF emitters. Detecting, separating, and classifying these POP signals are valuable, but difficult due to the overlapping in time and frequency. In this paper, we propose a time-frequency manifold representation to solve these challenging problems. Using time frequency analysis, we show that a frequency modulation RF (FMRF) signal can be represented as a one dimensional manifold embedded in a two dimensional time frequency space. Using graph theory, we propose a path finding approach to extract this time frequency manifold. With both theoretical analysis and experiments, we show that the proposed approach can extract both simple single and complicated pulse-on-pulse FMRF signals.

关键词： Time-frequency analysis Frequency modulation Receivers Signal processing Fourier transforms radar RF communications Signal detection

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Ultra-compact ultra-wideband radar for high-speed target tracking 25

Ultra-compact ultra-wideband radar for high-speed target tra...

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conference on radar sensor technology xxv

作者： Fusselman, Jakob Gilliam, Matthew Shrestha, Yunish Zhang, Yan (Rockee) Kelly, Keith Univ Oklahoma Adv Radar Res Ctr Sch Elect & Comp Engn Intelligent Aerosp Radio Team IART 3190 Monitor Ave Norman OK 73019 USA Agile RF Syst LLC 4316 Beverly Dr Berthoud CO 80513 USA

ISBN: (纸本)9781510643222

Using ultra-wideband (UWB) impulse radar for detecting and tracking fast-moving small targets over the ocean surface has been considered before with limited applications. The challenges of deploying such radar sensors on small, unmanned marine platforms are addressed in this study. The first challenge is the stringent size and weight requirement to allow a tracking radar sensor to be fitted into the payload of a small unmanned surface vehicle (USV). For the first time, we implemented a design that is based on a single chip UWB radar sensor operating at X-band, which effectively achieves the size and weight requirement for a small USV payload. The second challenge is range extension and range ambiguity resolution. With the UWB radar operating various high-PRF modes, we developed a novel approach that stitches together range profiles from multiple PRFs, to extend the effective non-ambiguous range at the cost of scan speed. The third challenge is developing a low-cost, ultra-wideband planar antenna and front-end, which is also part of the USV payload and needs to be able to perform either sector scanning, or even electronic scanning, with a very low profile. We have successfully designed and implemented one such antenna using a dipole array design. By integrating the solutions into a complete system, we have performed a series of lab and outdoor tests of the UWB radar sensor and obtained some promising target data. Simulations are also being developed for testing the potential target signatures and tracking effectiveness of moving targets over ocean surface clutter environments.

关键词： UWB radar radar high PRF

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Tripartite Correlation Performance for use in Quantum radar Systems 25

Tripartite Correlation Performance for use in Quantum Radar ...

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conference on radar sensor technology xxv

作者： Bowell, Rory A. Brandsema, Matthew J. Narayanan, Ram M. Howell, Stephen W. Dilger, Jonathan M. Penn State Univ Dept Elect Engn University Pk PA 16802 USA Penn State Univ Appl Res Lab University Pk PA 16802 USA Naval Surface Warfare Ctr NWSC Crane Div Crane IN 47522 USA

ISBN: (纸本)9781510643222

In recent years, quantum radar has focused entirely on using bipartite squeezed states of light as a mechanism for target detection. This paper studies the performance of a quantum radar that uses a tripartite squeezed state, whereby two signal beams are sent out towards the target which both correlate with the idler. It is found that for very low signal strengths, the bipartite has better performance. As the signal strength increases however, the tripartite becomes dominant. This result suggests that quantum radar (declared useful only in the low SNR regime) may possess more possibilities of increased performance at higher SNRs when different states are used for correlation. The bottleneck, of course, is the ability to generate transmit powers necessary to utilize.

关键词： Quantum radar covariance tripartite quantum enhancement entanglement

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