Results 1 to 10 of about 3,647 (110)

Cramér–Rao Lower Bound for Magnetic Field Localization around Elementary Structures [PDF]

open access: yesSensors
The determination of a mobile terminal’s position with high accuracy and ubiquitous coverage is still challenging. Global satellite navigation systems (GNSSs) provide sufficient accuracy in areas with a clear view to the sky. For GNSS-denied environments
Armin Dammann   +2 more
doaj   +2 more sources

Cramer–Rao Lower Bound for SoOp-R-Based Root-Zone Soil Moisture Remote Sensing [PDF]

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Signals of opportunity (SoOp) reflectometry (SoOp-R) is a maturing field for geophysical remote sensing as evidenced by the growing number of airborne and spaceborne experiments.
Dylan Ray Boyd   +7 more
doaj   +2 more sources

Estimation of the Measurement Accuracy of Wireless Passive Resonance Sensors [PDF]

open access: yesSensors
Resonators are passive devices that respond to an excitation signal by oscillating at their natural frequency with exponentially decreasing amplitudes. Physical, chemical and electrical variables can modify the natural frequencies of resonators.
Leonhard M. Reindl   +5 more
doaj   +2 more sources

Localization and ambiguity resolution algorithm for time-difference fusion of three satellites based on observation filtering [PDF]

open access: yesScientific Reports
To address the issues of low accuracy and time-difference ambiguity in the localization and tracking of multiple satellites, we have conducted a thorough study of the localization algorithm and the ambiguity resolution algorithm for the time-difference ...
Yanli Zhang   +5 more
doaj   +2 more sources

Variational Bayesian Algorithms for Maneuvering Target Tracking with Nonlinear Measurements in Sensor Networks

open access: yesEntropy, 2023
The variational Bayesian method solves nonlinear estimation problems by iteratively computing the integral of the marginal density. Many researchers have demonstrated the fact its performance depends on the linear approximation in the computation of the ...
Yumei Hu   +5 more
doaj   +1 more source

Malliavin calculus in statistical inference: Cramer-Rao lower bound for fuzzy random variables [PDF]

open access: yesتصمیم گیری و تحقیق در عملیات, 2020
The Cramer-Rao lower bound is obtained by using integration by parts and the Cauchy-Schwarz inequality.  The integration by parts formulas of Malliavin calculus plays a role in this study. The point estimation problem is very crucial and has a wide range
Hossein Jafari, Mohammad Javad Ebadi
doaj   +1 more source

Cramér-Rao Lower Bound for Fuzzy-Valued Random Variables

open access: yesAustrian Journal of Statistics, 2016
In some point estimation problems, we may confront imprecise (fuzzy) concepts. One important case is a situation where all observations are fuzzy rather than crisp.
Hamzeh Torabi
doaj   +1 more source

T2* quantification using multi-echo gradient echo sequences: a comparative study of different readout gradients

open access: yesScientific Reports, 2023
To quantify T2*, multiple echoes are typically acquired with a multi-echo gradient echo sequence using either monopolar or bipolar readout gradients. The use of bipolar readout gradients achieves a shorter echo spacing time, enabling the acquisition of a
Seonyeong Shin   +2 more
doaj   +1 more source

СRAMER-RAO AND BHATTACHARYYA BOUNDS FOR ACCURACY ESTIMATION OF SUB-PIXEL IMAGE CO-REGISTRATION

open access: yesРадіоелектронні і комп'ютерні системи, 2018
The subject matter of the article is theoretical lower bounds of parameter estimates applied to the problem of image co-registration. The goal is to study and compare the Cramer-Rao and Bhattacharyya bounds.
Виталий Анатольевич Душепа
doaj   +1 more source

The hybrid Cramér-Rao lower bound for simultaneous self-localization and room geometry estimation

open access: yesEURASIP Journal on Advances in Signal Processing, 2021
This paper addresses the problem of tracking a moving source, e.g., a robot, equipped with both receivers and a source, that is tracking its own location and simultaneously estimating the locations of multiple plane reflectors.
Maya Veisman, Yair Noam, Sharon Gannot
doaj   +1 more source

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