Results 11 to 20 of about 337,357 (338)

Design and Implementation of Opportunity Signal Perception Unit Based on Time-Frequency Representation and Convolutional Neural Network

Sensors, 2021
The traditional signal of opportunity (SOP) positioning system is equipped with dedicated receivers for each type of signal to ensure continuous signal perception. However, it causes a low equipment resources utilization and energy waste. With increasing
Zhongliang Deng, Hang Qi, Yanxu Liu, Enwen Hu   +3 more
doaj   +4 more sources

Positioning Using IRIDIUM Satellite Signals of Opportunity in Weak Signal Environment

, 2019
In order to get rid of the dependence of the navigation and positioning system on the global navigation satellite system (GNSS), radio, television, satellite, and other signals of opportunity (SOPs) can be used to achieve receiver positioning.
Zizhong Tan, H. Qin, L. Cong, Chao Zhao
semanticscholar   +2 more sources

Forest canopy scattering properties with signal of opportunity reflectometry: theoretical simulations

Geoscience Letters, 2021
In recent years, signal of opportunity reflectometry (SoOp-R) has become a promising remote sensing technique. This emerging technique employs the reflected signals from existing Global Navigation Satellite System (GNSS) or communication satellites to ...
Xuerui Wu, Andrés Calabia, Jin Xu, Weihua Bai, Peng Guo   +4 more
doaj   +2 more sources

Signals Of Opportunity In Mobile Radio Positioning

, 2012
Publication in the conference proceedings of EUSIPCO, Bucharest, Romania ...
Dammann, Armin, Sand, Stephan, Raulefs, Ronald   +2 more
openaire   +5 more sources

A Study on an Anti-Multiple Periodic Frequency Modulation (PFM) Interference Algorithm in Single-Antenna Low-Earth-Orbit Signal-of-Opportunity Positioning Systems

Remote Sensing
Signal-of-Opportunity (SOP) positioning based on Low-Earth-Orbit (LEO) constellations has gradually become a research hotspot. Due to their large quantity, wide spectral coverage, and strong signal power, LEO satellite SOP positioning exhibits robust ...
Lihao Yao, Honglei Qin, Hao Xu, Deyong Xian, Donghan He, Boyun Gu, Hai Sha, Yunchao Zou, Huichao Zhou, Nan Xu, Jiemin Shen, Zhijun Liu, Feiqiang Chen, Chunjiang Ma, Xiaoli Fang   +14 more
doaj   +3 more sources

Weak signal detection: A discrete window of opportunity for achieving ‘Vision 90:90:90’?

SAHARA-J, 2016
Introduction: UNAIDS’ Vision 90:90:90 is a call to ‘end AIDS’. Developing predictive foresight of the unpredictable changes that this journey will entail could contribute to the ambition of ‘ending AIDS’.
Christopher J. Burman, Marota Aphane, Peter Delobelle   +2 more
doaj   +2 more sources

Overview of the system-level anti-jamming capability and developmental challenges of low-earth-orbit signal-of-opportunity

Frontiers in Physics
Signal-of-Opportunity (SOP) navigation based on Low-Earth-Orbit (LEO) satellite constellations has increasingly become a research hotspot. Due to the large number of LEO satellites, wide spectrum coverage, and strong signal power, LEO satellite Signal-of-
Lihao Yao, Lihao Yao, Bin Fan, Honglei Qin, Deyong Xian, Mengli Wang, Boyun Gu, Sumin Chen, Sumin Chen, Changhong Wang, Changhong Wang, Xuyu Wang, Jiemin Shen, Dongfang Jiang, Heng Wei, Haoyuan Yu, Bingjie Liu, Shuai Shao   +17 more
doaj   +2 more sources

A Study on Anti-Jamming Algorithms in Low-Earth-Orbit Satellite Signal-of-Opportunity Positioning Systems for Unmanned Aerial Vehicles

Drones
Low-Earth-Orbit (LEO) satellite Signal-of-Opportunity (SOP) positioning technology has gradually matured to meet the accuracy requirements for unmanned aerial vehicle (UAV) positioning in daily scenarios.
Lihao Yao, Honglei Qin, Boyun Gu, Guangting Shi, Hai Sha, Mengli Wang, Deyong Xian, Feiqiang Chen, Zukun Lu   +8 more
doaj   +3 more sources

Autonomous Integrity Monitoring for Vehicular Navigation With Cellular Signals of Opportunity and an IMU

IEEE transactions on intelligent transportation systems (Print), 2022
A receiver autonomous integrity monitoring (RAIM) framework for ground vehicle navigation using ambient cellular signals of opportunity (SOPs) and an inertial measurement unit (IMU) is developed.
Mahdi Maaref, Z. Kassas
semanticscholar   +1 more source

Practical Use of Starlink Downlink Tones for Positioning

Sensors, 2023
The large availability of Low Earth Orbit (LEO) satellite systems makes them useful beyond their original purposes, such as in positioning, where their signals can be passively used.
Nabil Jardak, Ronan Adam
doaj   +1 more source