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

共 51 条记录，以下是1-10 订阅

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InterFusion: Interaction-based 4D radar and LiDAR Fusion for 3D Object Detection

InterFusion: Interaction-based 4D Radar and LiDAR Fusion for...

引用

IEEE/RSJ International conference on Intelligent Robots and Systems (IROS)

作者： Wang, Li Zhang, Xinyu xv, Baowei Zhang, Jinzhao Fu, Rong Wang, Xiaoyu Zhu, Lei Ren, Haibing Lu, Pingping Li, Jun Liu, Huaping Tsinghua Univ State Key Lab Automot Safety & Energy Beijing Peoples R China Tsinghua Univ Sch Vehicle & Mobil Beijing Peoples R China Mogo Auto Intelligence & Telemet Informat Technol Beijing Peoples R China Meituan Inc Beijing Peoples R China Univ Michigan Ann Arbor MI 48109 USA Tsinghua Univ Dept Comp Sci & Technol Beijing Peoples R China Tsinghua Univ State Key Lab Intelligent Technol & Syst Beijing Peoples R China

ISBN: (数字)9781665479271

ISBN: (纸本)9781665479271

Many recent works detect 3D objects by several sensor modalities for autonomous driving, where high-resolution cameras and high-line LiDARs are mostly used but relatively expensive. To achieve a balance between overall cost and detection accuracy, many multi-modal fusion techniques have been suggested. In recent years, the fusion of LiDAR and radar has gained ever-increasing attention, especially 4D radar, which can adapt to bad weather conditions due to its penetrability. Although features have been fused from multiple sensing modalities, most methods cannot learn interactions from different modalities, which does not make for their best use. Inspired by the self-attention mechanism, we present InterFusion, an interaction-based fusion framework, to fuse 16-line LiDAR with 4D radar. It aggregates features from two modalities and identifies cross-modal relations between radar and LiDAR features. In experimental evaluations on the Astyx HiRes 2019 dataset, our method outperformed the baseline by 4.20% mAP in 3D and 10.76% BEV mAP for the car class at the moderate level.

关键词： Point cloud compression Meteorological radar Laser radar Three-dimensional displays Fuses radar detection Object detection

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Remote Moisture Quantification of Concrete using SAR Images and the K-R-I Transform 15

Remote Moisture Quantification of Concrete using SAR Images ...

引用

conference on Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation xv

作者： Alzeyadi, Ahmed Yu, Tzuyang Univ Massachusetts Dept Civil & Environm Engn Kitson 200-TOne Univ Ave Lowell MA 01854 USA

ISBN: (数字)9781510640146

ISBN: (纸本)9781510640146

Moisture content in Portland cement concrete structures is commonly associated with many durability problems (e.g., steel corrosion) and can be used in structural health monitoring and nondestructive evaluation/testing (NDE/T) of concrete structures. While several intrusive techniques are available for quantifying moisture content inside concrete structures, it is a challenging task to estimate the moisture content of concrete in the field without using embedded moisture sensors. In this paper, synthetic aperture radar (SAR) imaging as a nonintrusive technique and the K-R-I (curvature-area-amplitude) transform are applied to concrete panel specimens made of two water-to-cement (w/c) ratios (w/c = 0.4 and 0.5) for moisture determination. Concrete panel specimens with dimensions of 0.3 m-by-0.3 m-by-0.05 m were manufactured and conditioned in a laboratory environment by air-drying for three months. Its time-dependent moisture variation was simultaneously monitored by a 10.5-GHz center frequency SAR imaging sensor inside an anechoic chamber. Quantitative analysis of SAR images was carried out by using the K-R-I transform to understand the simultaneous change of SAR amplitude and distribution (contour shape) at different moisture contents. It was found that SAR amplitude and its distribution increase with the increase of moisture content inside concrete panel specimens. Spatial distribution of SAR amplitudes can be used to indicate subsurface moisture distribution inside concrete. The area-amplitude (R-I) curve of SAR images can be used to quantify the relationship between moisture content and its distribution.

关键词： Moisture content concrete water-to-cement ratio synthetic aperture radar remote sensing K-R-I transform

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Target Localization with a Single-Antenna Monostatic radar via Multipath Exploitation

Target Localization with a Single-Antenna Monostatic Radar v...

引用

conference on radar sensor technology xv

作者： Setlur, Pawan Smith, Graeme. E. Ahmad, Fauzia Amin, Moeness. G. Villanova Univ Ctr Adv Commun Radar Imaging Lab Villanova PA 19085 USA

ISBN: (纸本)9780819485953

In urban sensing and through-the-wall radar, the existence of targets in proximity to walls or buildings results in multipath returns. In this paper, we exploit the multipath from the walls to achieve target localization with a single sensor. We deal with sparse scenes of single targets. A time-of-arrival wall association algorithm is derived to relate target multipath returns to the respective walls, followed by a nonlinear least squares optimization to determine the target location. Simulated and experimental data are used to validate the proposed algorithms.

关键词： Localization through-the-wall radar urban sensing noncoherent localization multipath exploitation

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radar Signature Acquisition using an Indigenously Designed Noise radar System

Radar Signature Acquisition using an Indigenously Designed N...

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conference on radar sensor technology xv

作者： Freundorfer, A. P. Siddiqui, J. Y. Antar, Y. M. M. Thayaparan, T. Queens Univ Kingston ON Canada Royal Mil Coll Canada Kingston ON Canada DRDC Ottawa ON Canada

ISBN: (纸本)9780819485953

A new design of a noise radar system is proposed with capabilities to measure and acquire the radar signature of various targets. The proposed system can cover a noise bandwidth of near DC to 30 GHz. The noise radar signature measurements were conducted for selective targets like spheres and carpenter squares with and without dielectric bodies for a noise band 400MHz-3000MHz. The bandwidth of operation was limited by the multiplier and the antennae used. The measured results of the target signatures were verified with the simulation results.

关键词： Noise radar radar signature

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A computer simulation of a Long Range CWFM radar Showing the Tradeoffs of Performance as a Function of Range

A computer simulation of a Long Range CWFM Radar Showing the...

引用

conference on radar sensor technology xv

作者： Gordy, Robert S. Zoledziowski, Severyn Global Tech Syst St Petersburg FL 33716 USA

ISBN: (纸本)9780819485953

This paper describes a study of the operation of a long range CWFM radar using "System View"(ref1)software for modeling and simulation. The System View software is currently offered by Agilent. The models that were studied include: a model illustrating the basic principle of operation of the CWFM radar, the range resolution of the radar, the effect of long range processing and the resultant approach with the tradeoff of detected range resolution due to Doppler frequency shift as a function of range distance. The study was performed as part of the design of an airborne CWFM radar. The radar can be designed with a single antenna or a dual antenna. The dual antenna approach is presented in this paper.

关键词： Computer simulation CWFM radar

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Noise radar with broadband microwave ring correlator

Noise radar with broadband microwave ring correlator

引用

conference on radar sensor technology xv

作者： Susek, Waldemar Stec, Bronislaw Mil Univ Technol PL-00908 Warsaw Poland

ISBN: (纸本)9780819485953

A principle of quadrature correlation detection of noise signals using an analog broadband microwave correlator is presented in the paper. Measurement results for the correlation function of noise signals are shown and application of such solution in the noise radar for precise determination of distance changes and velocity of these changes is also presented. Results for short range noise radar operation are presented both for static and moving objects. Experimental results using 2,6 - 3,6 GHz noise like waveform for the signal from a breathing human is presented. Conclusions and future plans for applications of presented detection technique in broadband noise radars bring the paper to an end.

关键词： Telecommunications microwave receiver noise radar correlation

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Nonlinear Dynamics Method for Target Identification

Nonlinear Dynamics Method for Target Identification

引用

conference on radar sensor technology xv

作者： Carroll, Thomas L. Rachford, Frederic J. USN Res Lab Washington DC 20375 USA

ISBN: (纸本)9780819485953

One may describe the effect of a radar or sonar target on an incoming signal as a filter which produces a scattered signal. Chaotic signals are very sensitive to the effect of filters, so a radar or sonar target imposes a unique signature on a scattered chaotic signal. In this paper we describe a method that uses the concept of phase space dimension to create a reference from a scattered chaotic signal. This reference becomes part of a library, and comparing an unknown scattered signal to this library can reveal which target caused a particular scattered signal. Because we are not imaging the target, this method can use signal with low range resolution.

关键词： Chaos radar target identification dimension phase space

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Synthetic aperture radar for disaster monitoring

Synthetic aperture radar for disaster monitoring

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conference on radar sensor technology xv

作者： Dunkel, R. Saddler, R. Doerry, A. W. General Atomics Aeronautical Systems Inc. (United States) Sandia National Labs. (United States)

ISBN: (纸本)9780819485953

Synthetic Aperture radar (SAR) is well known to afford imaging in darkness and through clouds, smoke, and other obscurants. As such, it is particularly useful for mapping and monitoring a variety of natural and man-made disasters. A portfolio of SAR image examples has been collected using General Atomics Aeronautical Systems, Inc.'s (GA-ASI's) Lynx (R) family of Ku-Band SAR systems, flown on both operational and test-bed aircraft. Images are provided that include scenes of flooding, ice jams in North Dakota, agricultural field fires in southern California, and ocean oil slicks from seeps off the coast of southern California.

关键词： SAR radar disaster oil spill fire flood earthquake

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Comparison of Three radar Systems for Through-the-Wall Sensing

Comparison of Three Radar Systems for Through-the-Wall Sensi...

引用

conference on radar sensor technology xv

作者： Wang, X. Li, J. Yang, Y. Lu, C. Kwan, C. Ayhan, B. Univ Texas Pan Amer Edinburg TX 78541 USA Towson Univ Towson MD USA Signal Proc Inc Rockville MD USA

ISBN: (纸本)9780819485953

In this paper, we summarize our efforts of using three different radars (impulse radar, swept frequency radar, and continuous-wave radar) for through-the-wall sensing. The purpose is to understand the pros and cons of each of the three radars. Through extensive experiments, it was found that the radars are complementary and multiple radars are needed for different scenarios of through-the-wall target detection and tracking.

关键词： Through-the-wall radar impulse radar swept frequency radar continuous-wave radar

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Visualizing and Displaying radar Micro-Doppler Data

Visualizing and Displaying Radar Micro-Doppler Data

引用

conference on radar sensor technology xv

作者： Tahmoush, Dave Silviousa, Jerry USA Res Lab Adelphi MD 20783 USA

ISBN: (纸本)9780819485953

A time-integrated range-Doppler map shows the micro-Doppler characteristics of targets in radar images that enable an operator to classify different target types and to classify different activities being done by the targets. A time-integrated range-Doppler map is a compilation of range-Doppler maps over time that results in a spectrogram-like characterization of Doppler while maintaining the range information as well. These are compiled from the range-Doppler maps by taking the maximum value for each pixel over a time range. The time resolution is overlapped onto the range resolution, which is in effect a rotation of the traditional spectrogram which compresses range. This type of radar imaging also allows multiple subjects to be viewed simultaneously and avoids tracking issues in spectrogram creation. The display of range-Doppler movies or spectrograms with range extent is also demonstrated.

关键词： radar micro-Doppler

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