Results 271 to 280 of about 12,611,004 (335)
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Applied Optics, 1994
A laser radar whose resolution is greater than 1 µm is reported. We present the radar results when they are used for such purposes as determining the size of a void inside a silicon wafer, profiling a cross-sectional pattern of an optical fiber, studying the birefringence of a lithium-niobate crystal, or finding a fault in an optical guide in an ...
K, Lizuka, S, Fujii
openaire +2 more sources
A laser radar whose resolution is greater than 1 µm is reported. We present the radar results when they are used for such purposes as determining the size of a void inside a silicon wafer, profiling a cross-sectional pattern of an optical fiber, studying the birefringence of a lithium-niobate crystal, or finding a fault in an optical guide in an ...
K, Lizuka, S, Fujii
openaire +2 more sources
Analysis of UWB Radar Sensor Networks
2010 IEEE International Conference on Communications, 2010Radar sensor networks (RSNs) are gaining importance in the context of passive localization and tracking. The performance of RSNs is affected by disturbances, system's parameters, network topology, and the number of radar elements. In this paper, we derive a unified analytical framework that takes all this aspects into account and allows the ...
Stefania Bartoletti +2 more
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A Millimeter-Wave MIMO Radar Network for Human Activity Recognition and Fall Detection
International Radar ConferenceFalling is a major risk for elderly people. To enable independent living, fall detection and activity monitoring are desirable. Radar is a sensor principle that offers the possibility to detect falls in a contactless, privacy-preserving fashion ...
Ann-Christine Froehlich +6 more
semanticscholar +1 more source
Sensor Radar Networks for Indoor Tracking
IEEE Wireless Communications Letters, 2014Sensor radars (SRs) are important for a variety of applications requiring passive tracking of moving targets. The accuracy of passive tracking is severely degraded by wireless propagation impairments such as multipath, clutter, and non line-of-sight conditions, especially in indoor environments.
Stefania Bartoletti +3 more
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VRNet: A Vivid Radar Network for Precipitation Nowcasting
IEEE Transactions on Geoscience and Remote SensingRadar echo extrapolation, as a widely used approach for precipitation nowcasting, plays a pivotal role in severe convective weather warnings. Previous studies have encountered the dilemma of extrapolation ambiguity, which leads to low availability of ...
Wei Fang, Liang Shen, Victor S. Sheng
semanticscholar +1 more source
Multipath Exploitation for Human Activity Recognition Using a Radar Network
IEEE Transactions on Geoscience and Remote SensingIn this study, the problem of multipath in radar sensor networks for human activity recognition (HAR) has been examined. Traditionally considered as a source of additional clutter, the multipath is being investigated for its potential to be exploited ...
R. Guendel +3 more
semanticscholar +1 more source
Informative Radar Selection for Tracking in Radar Networks
IET International Radar Conference 2015, 2015In radar networks, radar selection has played a more and more important role. Many radar selection methods have been proposed. Recently a novel method which is based on sparsity-aware matrix decomposition has been proposed to identify informative sensors for target tracking. However, this method had stringent constraints and was under the assumption of
Xueting Li Xueting Li +5 more
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Game-Theoretic Strategy Design of Multistatic MIMO Radar Network and Jammer
IEEE Transactions on Aerospace and Electronic SystemsThis article investigates the game-theoretic strategy design problem between multistatic multiple-input–multiple-output (MIMO) radar network and jammer. We consider a radar network organized into multiple statistical MIMO radars. The conflict between the
Gangsheng Zhang +2 more
semanticscholar +1 more source
IEEE Sensors Journal, 2020
In order to simultaneously enhance the low probability of intercept (LPI) performance and resource utilization of distributed radar network system, an LPI-based collaborative power and bandwidth allocation (CPBA) strategy is developed for multi-target ...
C. Shi +4 more
semanticscholar +1 more source
In order to simultaneously enhance the low probability of intercept (LPI) performance and resource utilization of distributed radar network system, an LPI-based collaborative power and bandwidth allocation (CPBA) strategy is developed for multi-target ...
C. Shi +4 more
semanticscholar +1 more source
2007 Conference Record of the Forty-First Asilomar Conference on Signals, Systems and Computers, 2007
In this paper the coverage performance of a radar network is examined in which four different forms of processing concept are applied to the same data collected. It is found that the coverage performance can be strongly dependent on the form of the processing concept used and on the number of the nodes (for a given false alarm rate).
P.F. Sammartino +2 more
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In this paper the coverage performance of a radar network is examined in which four different forms of processing concept are applied to the same data collected. It is found that the coverage performance can be strongly dependent on the form of the processing concept used and on the number of the nodes (for a given false alarm rate).
P.F. Sammartino +2 more
openaire +1 more source