Results 21 to 30 of about 28,440,571 (273)

Using CryptoBin Encryption Algorithm in Military Applications [PDF]

open access: yesInternational Journal of Telecommunications, 2021
In recent years, there has been a significant increase in the use of location-based solutions. As a result, data encryption has become increasingly important in order to en-sure privacy and confidentiality, especially in all domains, military and civil ...
Hamed Zied, Ahmed Eltengy
doaj   +1 more source

Wireless Localization Method Using the Distributed Iterative Stochastic-Resonance-Based Signal Spectral Combination

open access: yesIEEE Access, 2022
In this study, a kind of nonlinear stochastic-resonance (SR) signal enhancement technique combined with the distributed receiving array signal power spectrum combination approach is proposed.
Di He   +3 more
doaj   +1 more source

Intelligent Location Models for Next Generation Location-based Services

open access: yes, 2007
To become truly ubiquitous, next generation location-based services (LBS) will have to rely on mobile platforms upon which multiple sensors and measurement systems have been integrated to provide continuous, three-dimensional positioning and orientation.
Winter, Stephan   +2 more
core   +4 more sources

Hall of Mirrors: A Novel Strategy to Address Locality in Geocoded-Based PoI Private Queries

open access: yesIEEE Access, 2022
Location privacy techniques try to protect user’s information by altering, aggregating or generalizing it. Geographical codification techniques, like Geohash, can be used to protect individual locations altering the precision of the location so it
Pedro Wightman   +3 more
doaj   +1 more source

3-D Spatial Spectrum Fusion Indoor Localization Algorithm Based on CSI-UCA Smoothing Technique

open access: yesIEEE Access, 2018
In the indoor wireless localization environment, the non-line-of-sight receiving signal and low signal-to-noise ratio are usually strongly dominant issues due to the heavy existence of multipath signals, which also restrict the final wireless ...
Di He   +5 more
doaj   +1 more source

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

Location-Based Services [PDF]

open access: yes, 2011
This chapter provides an overview of location-based services and insight into the pivotal importance of location-sensitivity to the success of wireless data services. This chapter argues that mass-market adoption of wireless data services will only occur if these services enhance productivity and/or convenience for end-users; transforming novelty into ...
Alexander Zipf, Matthias M. Jöst
  +5 more sources

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

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

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

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