Results 1 to 10 of about 18,409 (254)

Temporal Spectrum Analysis for Multi-Constellation Space Domain Awareness

open access: yes2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Space Domain Awareness (SDA) system has different major aspects including continues and robust awareness from the network that is crucial for an efficient control over all actors in space. The observability of the space assets on the other hand requires efficient analysis on when and how observed space objects can be controlled.
Mansour Naslcheraghi   +1 more
openaire   +3 more sources

A Novel VLSI Architecture for Multi-Constellation and Multi-Frequency GNSS Acquisition Engine

open access: yesIEEE Access, 2019
This paper proposes a novel VLSI architecture of GNSS acquisition engine based on short-time correlation combined with an FFT scheme. The architecture supports multi-constellation systems and multi-frequency satellite signals flexibly by the manner of ...
Yuheng Yang, Xiaohui Ba, Jie Chen
doaj   +1 more source

Research on Covert Communication in Satellite–Ground-Integrated Sensor Networks Based on FH-DL-MPWFRFT

open access: yesSensors
To further enhance the covert communication capability of satellite–ground-integrated sensor networks, a dual-polarization constellation joint modulation scheme based on frequency-hopping double-layer multi-parameter weighted fractional Fourier transform
Lei Ni   +5 more
doaj   +1 more source

Galileo: The Added Value for Integrity in Harsh Environments

open access: yesSensors, 2016
A global navigation satellite system (GNSS)-based navigation is a challenging task in a signal-degraded environments where GNSS signals are distorted by multipath and attenuated by fading effects: the navigation solution may be inaccurate or unavailable.
Daniele Borio, Ciro Gioia
doaj   +1 more source

Fast Screening Algorithm for Satellites Based on Multi-Constellation System

open access: yesElectronics
This paper proposes a fast satellite screening algorithm aimed at the problem of balancing between positioning accuracy and system computing efficiency in a multi-constellation system environment under the Global Navigation Satellite System (GNSS).
Weidong Zhou, Zhiqiang Wu
openaire   +1 more source

Chromaticity-Adaptive Generalized Spatial Modulation for MIMO VLC With Multi-Color LEDs

open access: yesIEEE Photonics Journal, 2019
In this paper, we propose a chromaticity-adaptive generalized spatial modulation (CA-GSM) method for multiple-input multiple-output (MIMO) visible light communication (VLC) systems with quadrichromatic LEDs (QLEDs).
Ye Xiao, Yi-Jun Zhu
doaj   +1 more source

An Innovative Low-Power, Low-Cost, Multi-Constellation Geodetic-Grade Global Navigation Satellite System Reference Station for the Densification of Permanent Networks: The GREAT Project. [PDF]

open access: yesSensors (Basel), 2023
Curone D   +11 more
europepmc   +1 more source

Effects of Equatorial Plasma Bubbles on Multi-GNSS Signals: A Case Study over South China

open access: yesRemote Sensing
Equatorial plasma bubbles (EPBs) occur frequently in low-latitude areas and have a non-negligible impact on navigation satellite signals. To systematically analyze the effects of a single EPB event on multi-frequency signals of GPS, Galileo, GLONASS, and
Hao Han   +12 more
doaj   +1 more source

GNSS Signals Acquisition and Tracking in Unfavorable Environment [PDF]

open access: yesRadioengineering, 2018
In this paper, we propose a method based on applying specific transformations to the Global Navigation Satellite System (GNSS) signals received in unfavorable environment.
S. Chebir   +4 more
doaj  

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