Results 21 to 30 of about 4,801,288 (304)

BDS-3 Integrity Risk Modeling and Probability Evaluation

open access: yesRemote Sensing, 2022
Focusing on the global integrity monitoring performance of the BDS-3, the integrity failure model and effect analysis (IFMEA) of the system space segment and the ground control segment were carried out, and the system integrity risk tree model was ...
Lei Chen   +9 more
doaj   +1 more source

A State Optimization Model Based on Kalman Filtering and Robust Estimation Theory for Fusion of Multi-Source Information in Highly Non-linear Systems

open access: yesSensors, 2019
Consistent state estimation is a vital requirement in numerous real life applications from localization to multi-source information fusion. The Kalman filter and its variants have been successfully used for solving state estimation problems.
Muhammad Adeel Akram   +4 more
doaj   +1 more source

Efficient Privacy-Preserving Scheme for Location Based Services in VANET System

open access: yesIEEE Access, 2020
A Vehicular Ad-hoc Network (VANET) is a type of Mobile Ad-hoc Network (MANET) that is used to provide communications between nearby vehicles, and between vehicles and fixed infrastructure on the roadside.
Fifi Farouk, Yasmin Alkady, R. Rizk
semanticscholar   +1 more source

Vector Graph Assisted Pedestrian Dead Reckoning Using an Unconstrained Smartphone

open access: yesSensors, 2015
The paper presents a hybrid indoor positioning solution based on a pedestrian dead reckoning (PDR) approach using built-in sensors on a smartphone. To address the challenges of flexible and complex contexts of carrying a phone while walking, a robust ...
Jiuchao Qian   +4 more
doaj   +1 more source

User location privacy protection mechanism for location-based services

open access: yesDigital Communications and Networks, 2021
With the rapid development of the Internet of Things (IoT), Location-Based Services (LBS) are becoming more and more popular. However, for the users being served, how to protect their location privacy has become a growing concern.
Yan He, Jiageng Chen
doaj   +1 more source

Differentially Private Location Privacy-preserving Scheme withSemantic Location [PDF]

open access: yesJisuanji kexue, 2021
How to realize more reasonable noise addition in location differential privacy-preserving is a hot topic issue.However,adding the same amount of noise in different locations will result in the decrease of service availability and privacy preservation.To ...
ZHANG Xue-jun, YANG Hao-ying, LI Zhen, HE Fu-cun, GAI Ji-yang, BAO Jun-da
doaj   +1 more source

Virtual Location-Based Services: Merging the Physical and Virtual World [PDF]

open access: yes, 2013
Location-based services gained much popularity through providing users with helpful information with respect to their current location. The search and recommendation of nearby locations or places, and the navigation to a specific location are some of the
Hauswirth, Manfred   +2 more
core   +2 more sources

Improvement of Noise Uncertainty and Signal-To-Noise Ratio Wall in Spectrum Sensing Based on Optimal Stochastic Resonance

open access: yesSensors, 2019
Noise uncertainty and signal-to-noise ratio (SNR) wall are two very serious problems in spectrum sensing of cognitive radio (CR) networks, which restrict the applications of some conventional spectrum sensing methods especially under low SNR ...
Di He   +4 more
doaj   +1 more source

Differential Privacy Preservation for Location Semantics

open access: yesSensors, 2023
With the rapid development of intelligent mobile terminals and communication technologies, location-based services (LBSs) have become an essential part of users’ lives. LBS providers upload and share the collected users’ location data.
Liang Yan   +5 more
doaj   +1 more source

Trajectory Representation in Location-Based Services: Problems and Solution [PDF]

open access: yes, 2003
Recently, much work has been done in feasibility studies on services offered to moving objects in an environment equipped with mobile telephony, network technology and GIS.
By, Rolf A. de, Meratnia, Nirvana
core   +3 more sources

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