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

共 6000 条记录，以下是171-180 订阅

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Comparative Analysis of mmWave radar-based Object Detection in Autonomous Vehicles

Comparative Analysis of mmWave Radar-based Object Detection ...

引用

2024 IEEE International conference on Consumer Electronics, ICCE 2024

作者： Sharifisoraki, Ziaaddin Amini, Marzieh Rajan, Sreeraman Carleton University School of Information Technology Ottawa Canada Carleton University System and Computer Engineering Department Ottawa Canada

ISBN: (纸本)9798350324136

Millimeter-wave radar technology is gaining popularity as a perception sensor in autonomous vehicles. This is due to its ability to detect nearby objects in adverse weather conditions, such as rain, snow, or fog, as well as its cost-effectiveness. In this paper, we explore the impact of different backbones and object detector heads on the performance of radar-based object detection algorithms. More specifically, we employ the RADDet dataset and its object detection algorithm which provides the entire Range-Azimuth-Doppler spectrum and incorporates an automatic annotation approach. We examine different backbones and object detector heads to identify optimal model combinations for autonomous driving applications. Our results show that using a YOLOv4 head integrated with a modified ResNet backbone leads to the highest mean average precision, reaching 66.3% with an intersection over union (IoU) of 0.1, and 43.6% with an IoU of 0.3. This observation will help to advance radar-based object detection, thereby enhancing safety and reliability in diverse environmental conditions. © 2024 IEEE.

关键词： mmWave radar Object Detection ResNet VGG YOLO

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A High-Power Dual-Screen Frequency Selective Surface Flat Plate Radome for radar Cross Section Reduction 16

A High-Power Dual-Screen Frequency Selective Surface Flat Pl...

引用

16th International conference on Microwave and Millimeter Wave technology, ICMMT 2024

作者： Liu, Xuan Zhang, Qiang Sun, Yunfei Zhang, Quan Yuan, Chengwei National University of Defense Technology High Power Microwave Technology Research Institute China

A symmetrically structured dual-screen frequency selective surface (FSS) unit cell is designed to investigate the influence of screen spacing on electromagnetic transmission characteristics. The dual-screen FSS unit cell has a wider bandwidth, flatter in-band response, and better out-of-band steepening characteristics than the single-screen FSS unit cell. The power capacity of the dual-screen FSS unit cell can reach a gigawatt level at multiple frequency points after arraying. The dual-screen FSS radome has an obvious radar cross section (RCS) reduction effect at 8-10 GHz, and the average RCS reduction in this frequency range can reach 10.4 dB. © 2024 IEEE.

关键词： radar cross section

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Synergy between radar and Radiometer Observations of Precipitation from Space 17

Synergy between Radar and Radiometer Observations of Precipi...

引用

17th European conference on Antennas and Propagation (EuCAP)

作者： Chandrasekar, V. Reising, Steven C. Radhakrishnan, Chandrasekar Colorado State Univ Elect & Comp Engn Ft Collins CO 80523 USA

ISBN: (纸本)9788831299077

This paper is a tribute to Prof Frank Marzano's legacy. The objective of this study is to cross-validate radar (active sensor) and radiometer (passive sensor) satellite observations over tropical cyclones, typhoons and hurricanes. To accomplish this, Global Precipitation Measurement (GPM) Dual-frequency Precipitation radar (DPR) observations are compared with GPM Microwave Imager (GMI) and Temporal Experiment for Storms and Tropical Systems Demonstration (TEMPEST-D) CubeSat observations over precipitating systems. The purpose of this paper is twofold: first, to demonstrate a methodology to show consistency between DPR and GMI, and second, to apply this method to demonstrate consistency between DPR and TEMPEST-D CubeSat observations. This paper also develops a Pearson correlation coefficient (r) metric between parameters derived from radar and radiometer observations. The corresponding correlation between DPR and GMI, as well as between TEMPEST-D and DPR, are 0.90 and 0.85, respectively.

关键词： GPM-GMI GPM-DPR TEMPEST-D CubeSat microwave radiometry radar instrument calibration

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Detecting Road Tunnel-Like Environments Using Acoustic Classification for sensor Fusion with radar Systems 8th

Detecting Road Tunnel-Like Environments Using Acoustic Class...

引用

8th International conference on Engineering of Computer-Based Systems, ECBS 2023

作者： Stojkov, Nikola Tirnanić, Filip Luković, Aleksa Faculty of Technical Sciences Novi Sad Serbia Novi Sad Serbia

ISBN: (纸本)9783031492518

radar systems equipped with Misalignment Monitoring and Adjustment (MM &A) face challenges in accurately functioning within complex environments, particularly tunnels. Standard radar system design assumes constant background activity of the MM &A throughout a host vehicle’s ignition cycle, monitoring for misaligned radar sensors and mitigating issues associated with faulty radar measurements. However, the presence of tunnels and other unfavorable driving conditions can influence MM &A, thereby affecting its performance. To address this issue, it is crucial to develop a reliable method for detecting tunnel-like environments and appropriately adjusting the MM &A system. This research paper focuses on the novel acoustic sensing system called SONETE (Sonic Sensing for Tunnel Environment) for classification of acoustic signatures recorded by pressure zone microphone to accurately identify tunnel environments. The study aims to explore acoustic features and classification algorithms to distinguish between road and tunnel environment and using a sensor fusion with radar systems, suspend the MM &A system accordingly. By tackling this problem, the research contributes to the advancement of intelligent transportation systems by enhancing radar technology’s robustness in complex environments and ensuring effective MM &A adjustments in tunnels. Overall, this paper demonstrates the potential of using acoustic signatures as a complementary sensor for tunnel detection in vehicles where traditional sensors have limitations. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： radar measurement

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Estimation of Water Surface Velocity Using FMCW radar with On-Chip Antenna

Estimation of Water Surface Velocity Using FMCW Radar with O...

引用

2024 Asia-Pacific Microwave conference

作者： Chen, Jintao Hung, Wing-Hung Wu, Ke-Li Chinese Univ Hong Kong Dept Elect Engn Hong Kong Peoples R China

ISBN: (纸本)9798350363555;9798350363548

This paper introduces a methodology for estimating surface water velocity utilizing Frequency Modulated Continuous Wave (FMCW) millimeter-wave (mmWave) radar technology operating at 60 GHz. The study leverages the IWR6843AOP radar sensor to obtain high-resolution data on water surfaces. By employing 1TX 1RX configuration, this method achieves an extensive beam width without compromising accuracy due to the specially designed algorithm for precise velocity estimation. This non-contact technique serves as an efficient and reliable alternative to conventional methods, offering enhanced safety and accessibility. Experimental results substantiate the efficacy of our approach, demonstrating significant promise for widespread application in environmental monitoring and water management systems.

关键词： Water flow velocity FMCW radar Millimeter-wave radar Surface velocity estimation non-contact measurement Signal processing algorithm Environmental monitoring Water resource management

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Research on Sag Monitoring technology of Transmission Line Based on Millimeter Wave radar 4

Research on Sag Monitoring Technology of Transmission Line B...

引用

4th International conference on Energy Engineering and Power Systems, EEPS 2024

作者： Zhang, Minghao Ma, Xiao Li, Mengxuan Tang, Haitao China Electric Power Research Institute Transmission and Transformation Engineering Research Department Beijing China

ISBN: (纸本)9798350366914

Monitoring wire distance to ground has important reference significance for dynamic capacity increase and safety distance confirmation of transmission lines. The traditional sag monitoring uses temperature, mechanics and other monitoring parameters, combined with tower design parameters to calculate the distance to the ground indirectly, the accuracy is difficult to evaluate. With the rapid development of low power radar ranging technology, a new idea is provided for the measurement of wire distance to ground in the transmission line scenario. In this paper, the hardware system and waveform design are carried out based on the millimeter wave radar chip in the 80GHz band, and the radar echo signal is screened and feature extracted based on the CA-CFAR algorithm to realize the location confirmation of the ground low-reflectivity target. At the same time, based on the six-axis attitude sensor, an attitude solution algorithm is proposed to further improve the accuracy of ground distance monitoring. Compared with the previous methods, the direct measurement of the distance between the conductor and the ground will promote the development of the sag monitoring technology to the low power consumption, low cost and large-scale application. © 2024 IEEE.

关键词： Condition monitoring

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An Integrated Structure with functions of Fabry-Perot Antenna and Wideband Liquid Absorber 16

An Integrated Structure with functions of Fabry-Perot Antenn...

引用

16th International conference on Microwave and Millimeter Wave technology (ICMMT)

作者： Zou, Yukun Kong, Xiangkun Nanjing Univ Aeronaut & Astronaut Key Lab Radar Imaging & Microwave Photon Minist Educ Nanjing 210016 Peoples R China

ISBN: (纸本)9798350389968

This work proposes an integrated construction that combines the functions of a high-gain antenna with a wideband liquid absorber. A high-gain antenna has first been created. Next, an ethanol-based absorber has been created. Two structures are finally connected together. The antenna has a gain of up to 21.5 dBi and operates in the 100 MHz range, according to the simulation findings. The absorber's absorption band spans from 2 GHz to 18 GHz, and its absorption bandwidth exceeds 124% when ethanol is added.

关键词： Fabry-Perot interferometers

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radar Stealth Structure Design Method for Aircraft Target Based on NURBS Modeling 16

Radar Stealth Structure Design Method for Aircraft Target Ba...

引用

16th International conference on Microwave and Millimeter Wave technology (ICMMT)

作者： Ding, Xinyu Zhang, Haijun Tao, Shifei Nanjing Univ Sci & Technol Sch Elect & Opt Engn Nanjing 210094 Peoples R China

ISBN: (纸本)9798350389968

A stealth aircraft is constructed by Non-Uniform Rational B-Splines(NURBS), which surface can be controlled flexibly by changing the parameters of curves. By selecting the control point coordinates of NURBS reasonably, the aircraft structure is made up of only two surfaces. Therefore, the calculation amount of electromagnetic simulation is reduced. Then, the method of changing the weight with iterations is used to solve the limitation that the traditional optimization algorithm is easy to converge to the boundary. The RCS of aircraft is further reduced by using the improved optimization algorithm from -25.86dBsm to -38.86dBsm.

关键词： Aircraft models

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Design and Verification of a Two-Chip-Cascaded 4D mm-Wave Imaging radar for Indoor SLAM 21

Design and Verification of a Two-Chip-Cascaded 4D mm-Wave Im...

引用

21st European radar conference, EuRAD 2024

作者： Zhang, Wogong Palffy, Andras Baratam, Srimannnarayana Szekeres, Balazs Li, Nannan Kasper, Erich Chuhang Technology GmbH Germany Perciv B.V. Netherlands Nanjing Chuhang Technology Co. Ltd. China University of Stuttgart Falculty05: Computer Science Electrical Engineering and Information Technology Germany

ISBN: (纸本)9782874870798

Since the concept of simultaneous localization and mapping (SLAM) was proposed and investigated in 1980s, it has been attracting continuous attention in robotics regime. The sensor types applied for perception in SLAM are usually stereo or RGB cameras, also lidars based on point clouds output with high density and accuracy. Driven by the autonomous driving in the automobile industry emphasizing both performance and cost, the 4D millimeter-wave imaging radar becomes a new alternative for the SLAM perception. This work focuses on a SLAM oriented solution merely using the implemented mm-wave 4D imaging radar for an indoor demonstration. The two-chip cascaded 4D radar offers totally 6 transmitting and 8 receiving physic channels in RF front-end. By applying sparse antenna array and multi-input multi-output (MIMO) technique, 48 virtual channels can be emulated, which achieve angle separation each of 1.5°on the azimuth and 3°on the elevation plane. An indoor 3D SLAM demonstration has been also done based on real-Time point clouds output of the implemented 4D imaging radar. © 2024 European Microwave Association (EuMA).

关键词： radar imaging

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Deep Learning-based Anomaly Detection in radar Data with radar-Camera Fusion 28

Deep Learning-based Anomaly Detection in Radar Data with Rad...

引用

28th Asia-Pacific conference on Communications (APCC)

作者： Ning, Dian Han, Dong Seog Kyungpook Natl Univ Sch Elect & Elect Engn Daegu South Korea

ISBN: (纸本)9798350382617

sensors such as cameras, lidars, and radars are crucial to understanding driving situations in autonomous vehicles. These sensors are susceptible to external and internal abnormalities, potentially leading to severe traffic accidents. A radar sensor is inevitably affected by the obstruction caused by small objects, which can cause the system to malfunction. This paper presents a deep learning approach for detecting anomalies in radar data. The accuracy of anomaly detection is improved by using radar-camera fusion. Our proposed model detects the data anomaly by calculating the deviation from the standard radar cross section (RCS) range. The result demonstrates that the model is capable of identifying the normal range of radar signal and anomaly signal under several different obtained features situations. It enables the detection of potential hazards and warns of dangers to drivers and higher-level control systems, creating a more resilient environment for ensuring autonomous driving safety.

关键词： Anomaly Detection radar Cross Section (RCS) sensor Fusion

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