Results 191 to 200 of about 20,366 (247)

Temporal Decorrelation of Scattered GNSS Signals

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
The Global Navigation Satellite System Reflectometry (GNSS-R) is an emerging remote sensing technique based on the exploitation of scattered navigation signals for monitoring bio-geophysical parameters of the Earth surface. The receiver is placed onboard of airborne or spaceborne platforms, whose movement can affect the feature of the gathered signals.
Comite D., Pierdicca N.
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Temporal Decorrelation-Robust SAR Tomography

IEEE Transactions on Geoscience and Remote Sensing, 2014
Much interest is continuing to grow in advanced interferometric synthetic aperture radar (SAR) methods for full 3-D imaging, particularly of volumetric forest scatterers. Multibaseline (MB) SAR tomographic elevation beam forming, i.e., spatial spectral estimation, is a promising technique in this framework.
LOMBARDINI, FABRIZIO, CAI, FRANCESCO
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Temporal decorrelation of short laser pulses

Journal of the Optical Society of America B, 1998
We describe a unique approach for extracting the temporal profile of ultrashort laser pulses from typical autocorrelation measurements. The use of the constraint that intensity is a nonnegative quantity enables an iterative numerical algorithm to reconstruct pulse shapes in a one-dimensional procedure.
J. Peatross, A. Rundquist
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Speaker verification using temporal decorrelation post-processing

[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992
A text-dependent method of speaker verification processing which utilizes the statistical correlation between measured features of speech across whole words is described. The correlation is used in a linear discriminant analysis to define uncorrelated world-level features as a metric.
L.P. Netsch, G.R. Doddington
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Temporal backscattering coefficient decorrelation in burned areas

Active and Passive Microwave Remote Sensing for Environmental Monitoring II, 2018
Fire is considered an essential climate variable (ECV) by the Global Climate Observing System (GCOS). Remote sensing is often used to detect the burned areas and subsequently estimate CO2 emissions from wildfires. Most burned area mapping approaches are based on optical images.
Emilio Chuvieco, Angel Fernandez-Carrillo, Mihai A. Tanase, Miguel A. Belenguer-Plomer   +3 more
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Spatial-temporal decorrelation for image/video coding

2012 Picture Coding Symposium, 2012
Modern image/video compression techniques greatly help to store and transmit digital images and video data. Discrete wavelet transform is used in JPEG2000 because of its scalability and tolerable degradation. In H.264/AVC, predictive coding is employed to remove spatial redundancy before discrete cosine transform.
null Miaohui Wang, null King Ngi Ngan, null Long Xu   +2 more
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Temporal Decorrelation in Repeat-Pass Radar Interferometry

[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005
Correlation in pass-to-pass, interferometric radar can be degraded by thermal noise, lack of parallelism between the radar flight tracks, spatial baseline noise, and surficial change. The effects of decorrelation due to thermal noise can be easily evaluated and removed, while those due slight angular changes between flight tracks are negligible for ...
J. Villasenor, H. Zebker
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Effective Interference Suppression Via Spatio-Temporal Block Decorrelation

2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
In this paper, we present an effective method for suppressing spatially and temporally correlated interference. The method treats adjacent temporal samples of the received signal as signal branches coming from additional antennas and uses conventional methods for cancelling spatially correlated interference to decorrelate blocks of spatio-temporal ...
Dennis Hui, Abdulrauf Hafeez
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Radar Imaging From Geosynchronous Orbit: Temporal Decorrelation Aspects

IEEE Transactions on Geoscience and Remote Sensing, 2010
Synthetic aperture radar imaging from geosynchronous orbit has significant potential advantages over conventional low-Earth orbit radars, but it also has challenges to overcome. The baseline mission we consider is an L-band geosynchronous passive (bistatic) radar achieving a spatial resolution of about 100 m with an integration time of 8 h.
Davide Bruno, Stephen E Hobbs
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A Temporal Decorrelation Model for Polarimetric Radar Interferometers

IEEE Transactions on Geoscience and Remote Sensing, 2012
This paper describes a physical model of the temporal changes that occur in vegetated land surfaces observed by a repeat-pass radar interferometer. We assume the temporal changes to be caused by a Gaussian-statistic motion of the vegetation elements, with motion variance changing along the vertical direction.
Marco Lavalle, Marc Simard, Scott Hensley   +2 more
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