Results 51 to 60 of about 3,666 (129)

Doppler stretch and delay Cramer-Rao lower bound for signal with large bandwidth

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2016
In this paper Cramer-Rao lower bound of joint Doppler stretch and delay estimation for wideband signal is derived. We use wideband term to denote cases in which narrowband signal model is inappropriate.
I. V. Gogolev
doaj  

Existence of unbiased estimators in discrete quantum systems

open access: yesPhysical Review Research
The Cramér-Rao bound serves as a crucial lower limit for the mean square error of an estimator in frequentist parameter estimation. Paradoxically, it requires highly accurate prior knowledge of the estimated parameter for constructing the optimal ...
Javier Navarro   +2 more
doaj   +1 more source

Modified Cramer-Rao lower bound for symbol width estimation from a phase-shift-keying signal

open access: yesTongxin xuebao, 2009
The modified Cramer-Rao lower bound(MCRB) on symbol width estimation of a phase-shift-keying signal was derived.When calculating the integration of the square of dirac delta function δ(t ), Parseval’s theorem was used to transform the computation from ...
DENG Zhen-miao, LIU Yu
doaj   +2 more sources

Optimal sensing on an asymmetric exceptional surface

open access: yesPhysical Review Research
We study the connection between exceptional points (EPs) and optimal parameter estimation, in a simple system consisting of two counterpropagating traveling wave modes in a microring resonator.
Robert L. Cook   +2 more
doaj   +1 more source

Location Awareness in 5G Networks Using RSS Measurements for Public Safety Applications

open access: yesIEEE Access, 2017
One of the notable aspects of public safety applications in 5G networks is location awareness, which is a feature of contemporary technology that imparts details about a user`s geographical location to another user or application. Mobile users take their
Muhammad Alee Khan   +3 more
doaj   +1 more source

Autonomous Tracking of Intermittent RF Source Using a UAV Swarm

open access: yesIEEE Access, 2018
The localization of a radio-frequency transmitter with intermittent transmissions is considered via a group of unmanned aerial vehicles (UAVs) equipped with omnidirectional received signal strength sensors.
Farshad Koohifar   +2 more
doaj   +1 more source

Cooperative localization algorithm based on time-ofarrival in wireless senor network

open access: yesDianxin kexue, 2019
A novel cooperative location method based on time-of-arrival in wireless senor networks was proposed. Firstly, the optimization problem for the target location was established.
Qianqian LU   +3 more
doaj   +2 more sources

PCRLB for batch discrete‐time estimation through state decoupling

open access: yesElectronics Letters
This letter aims to obtain a closed‐form performance metric using the smoothing posterior Cramér–Rao lower bound (PCRLB) for a class of direct discrete‐time kinematic models.
Xiao‐Chuan Bao, Ji‐An Luo
doaj   +1 more source

Optimizing microseismic sensor networks in underground space using Cramér–Rao Lower Bound and improved genetic encoding

open access: yesUnderground Space
The layout of a sensor network is a critical determinant of the precision and reliability of microseismic source localization. Addressing the impact of sensor network configuration on positioning accuracy, this paper introduces an innovative approach to ...
Yichao Rui   +5 more
doaj   +1 more source

The Extremal Value Analysis of Sea Level in the Gulf of Cádiz and Alborán Sea: A New Methodology and the Resilience of Critical Infrastructures

open access: yesJournal of Marine Science and Engineering
Rising sea levels and increasing storm wave heights are two clear indicators of climate change affecting coastal environments worldwide. Coastal cities and infrastructure are particularly vulnerable to these hazards, highlighting the need for accurate ...
José J. Alonso del Rosario   +7 more
doaj   +1 more source

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