Results 41 to 50 of about 24,612 (214)
On the Attainment of the Cramer-Rao Lower Bound
The Annals of Statistics, 1976 It is often stated that the variance of an unbiased estimator of a function of a real parameter can attain the Cramer-Rao lower bound only if the family of distributions is a one-parameter exponential family. A rigorous proof of this statement, subject to certain regularity conditions, has been given by Wijsman.
openaire +3 more sources
An improper Cramer-Rao lower bound [PDF]
Applicationes Mathematicae, 1987 The author gives lower bounds for the risks of regular estimates. These bounds are of the Cramér-Rao type but do not depend on the bias of the estimates. It is shown by examples how the bounds can be applied to obtain results on minimaxity or efficiency of estimates.
openaire +2 more sources
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 more
wiley +1 more source
Comparison of estimation limits for quantum two-parameter estimation
Physical Review ResearchMeasurement estimation bounds for local quantum multiparameter estimation, which provide lower bounds on possible measurement uncertainties, have so far been formulated in two ways: by extending the classical Cramér-Rao bound (e.g., the quantum Cramér ...
Simon K. Yung +4 more
doaj +1 more source
On the Attainment of the Cramer-Rao Lower Bound
The Annals of Statistics, 1973 A rigorous proof is given of the often stated fact that if the variance of an unbiased estimator of a function of a real parameter attains the Cramer-Rao lower bound then the family of distributions must be a one-parameter exponential family.
openaire +2 more sources
Bounds for estimation of covariance matrices from heterogeneous samples [PDF]
, 2008 This correspondence derives lower bounds on the mean-square error (MSE) for the estimation of a covariance matrix mbi Mp, using samples mbi Zk,k=1,...,K, whose covariance matrices mbi Mk are randomly distributed around mbi Mp.
Besson, Olivier +2 more
core +2 more sources
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT This article investigates the Soret–Dufour cross‐diffusion effects on radiation‐absorptive unsteady free‐convection of magnetized nanofluids (TiO2–water$$ {\mathrm{TiO}}_2\hbox{--} \mathrm{water} $$ and Cu–water$$ \mathrm{Cu}\hbox{--} \mathrm{water} $$) flow over a vertical moving permeable plate.
B. Prabhakar Reddy +2 more
wiley +1 more source
Angle-of-Arrival Assisted GNSS Collaborative Positioning
Sensors, 2016 For outdoor and global navigation satellite system (GNSS) challenged scenarios, collaborative positioning algorithms are proposed to fuse information from GNSS satellites and terrestrial wireless systems.
Bin Huang +3 more
doaj +1 more source
Geolocation a known‐altitude moving source by TDOA and FDOA measurements
Electronics Letters, 2022 Source altitude information, if known or can be measured by an altimeter, can greatly improve localisation performance. In this letter, a novel algebraic solution for known‐altitude moving source geolocation using time difference of arrival and frequency
Yuhao Pei, Guizhou Wu, Fucheng Guo
doaj +1 more source
On the Estimation of Nonrandom Signal Coefficients from Jittered Samples [PDF]
, 2010 This paper examines the problem of estimating the parameters of a bandlimited signal from samples corrupted by random jitter (timing noise) and additive iid Gaussian noise, where the signal lies in the span of a finite basis.
Goyal, Vivek K, Weller, Daniel S.
core +5 more sources