Results 51 to 60 of about 329,290 (236)

Quantum-secured imaging [PDF]

open access: yes, 2012
We have built an imaging system that uses a photon's position or time-of-flight information to image an object, while using the photon's polarization for security.
Mehul Malik   +3 more
core   +3 more sources

Full-Velocity Radar Returns by Radar-Camera Fusion [PDF]

open access: yesarXiv, 2021
A distinctive feature of Doppler radar is the measurement of velocity in the radial direction for radar points. However, the missing tangential velocity component hampers object velocity estimation as well as temporal integration of radar sweeps in dynamic scenes. Recognizing that fusing camera with radar provides complementary information to radar, in
arxiv  

IRCI Free Range Reconstruction for SAR Imaging with Arbitrary Length OFDM Pulse [PDF]

open access: yes, 2013
Our previously proposed OFDM with sufficient cyclic prefix (CP) synthetic aperture radar (SAR) imaging algorithm is inter-range-cell interference (IRCI) free and achieves ideally zero range sidelobes for range reconstruction.
Kong, Lingjiang   +2 more
core   +1 more source

RaPlace: Place Recognition for Imaging Radar using Radon Transform and Mutable Threshold [PDF]

open access: yesarXiv, 2023
Due to the robustness in sensing, radar has been highlighted, overcoming harsh weather conditions such as fog and heavy snow. In this paper, we present a novel radar-only place recognition that measures the similarity score by utilizing Radon-transformed sinogram images and cross-correlation in frequency domain.
arxiv  

Dwell Time Allocation Algorithm for Multiple Target Tracking in LPI Radar Network Based on Cooperative Game

open access: yesSensors, 2020
To solve the problem of dwell time management for multiple target tracking in Low Probability of Intercept (LPI) radar network, a Nash bargaining solution (NBS) dwell time allocation algorithm based on cooperative game theory is proposed.
Chenyan Xue, Ling Wang, Daiyin Zhu
doaj   +1 more source

Broadband LFM Radar Imaging System Based on Microwave Photonic I/Q De-chirping

open access: yesLeida xuebao, 2019
We propose a novel scheme of broadband LFM radar imaging system based on microwave photonic I/Q de-chirping. In the transmitter, a broadband linear frequency modulated signal is generated by photonic frequency-doubling.
YANG Yue   +3 more
doaj   +1 more source

Joint Transmit Power and Dwell Time Allocation for Multitarget Tracking in Radar Networks under Spectral Coexistence

open access: yesLeida xuebao, 2023
For the resource allocation problem of multitarget tracking in a spectral coexistence environment, this study proposes a joint transmit power and dwell time allocation algorithm for radar networks.
Chenguang SHI, Jing DONG, Jianjiang ZHOU
doaj   +1 more source

Radar-Camera Sensor Fusion for Joint Object Detection and Distance Estimation in Autonomous Vehicles [PDF]

open access: yesarXiv, 2020
In this paper we present a novel radar-camera sensor fusion framework for accurate object detection and distance estimation in autonomous driving scenarios. The proposed architecture uses a middle-fusion approach to fuse the radar point clouds and RGB images.
arxiv  

Radar imaging mechanism of marine sand waves at very low grazing angle illumination [PDF]

open access: yes, 2005
The investigations carried out between 2002-2004 during several field experiments within the Op-erational radar and optical mapping in monitoring hydrodynamic, morphodynamic and environ-mental parameters for coastal management project (OROMA) aimed to ...
Hennings, Ingo, Herbers, Dagmar
core  

Multiantenna GPS-Over-Fiber System for Attitude Determination Using Phase-Derived Range Measurement

open access: yesIEEE Photonics Journal, 2019
A multiantenna global positioning system over fiber (GPS-over-fiber) system with real-time line bias monitoring is proposed for attitude determination of vehicles.
Xiangchuan Wang   +3 more
doaj   +1 more source

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