Results 11 to 20 of about 44,019 (240)

Development and Validation of a Multipath Mitigation Technique Using Multi-Correlator Structures

open access: yesNavigation, 2023
Multipath propagation is a major source of error in global navigation satellite systems (GNSSs), especially in urban environments. This is because conventional GNSS receivers can provide biased range estimates that lead to positioning errors.
Christian Siebert   +2 more
doaj   +1 more source

UTHM water quality classification based on sub index [PDF]

open access: yes, 2020
River or stream at their source is unpolluted, but as water flow downstream, the river or lake is receiving point and non-point pollutant source. Ammoniacal nitrogen (NH3- N) and suspended solids (SS) strongly influences the dynamics of the dissolved ...
Johari, A. H.   +2 more
core   +1 more source

Channel Measurement and Modeling Prototype for IEEE 802.22-Based Regional Area Networks

open access: yesIEEE Access, 2021
During the design and development of a reliable transceiver, its performance and robustness are evaluated using channel models that simulate the propagation channel characteristics in a real-world environment.
Ruiting Ouyang   +3 more
doaj   +1 more source

A spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurements

open access: yesMethodsX, 2023
In measurements and numerical modelling of wave propagation, undesired interference between direct and multipath arrivals can be reduced using Fourier-based signal processing methods.
Eivind Nag Mosland   +2 more
doaj   +1 more source

A particle filtering approach for joint detection/estimation of multipath effects on GPS measurements [PDF]

open access: yes, 2007
Multipath propagation causes major impairments to Global Positioning System (GPS) based navigation. Multipath results in biased GPS measurements, hence inaccurate position estimates.
Calmettes, Vincent   +2 more
core   +4 more sources

Exploiting Ultra-Wideband Channel Impulse Responses for Device-Free Localization

open access: yesSensors, 2022
In radio-frequency (RF)-based device-free localization (DFL), the number of sensors acting as RF transmitters and receivers is crucial for accuracy and system costs.
Marco Cimdins   +3 more
doaj   +1 more source

Performance degradation due to multipath noise for narrowband OFDM systems: channel-based analysis and experimental determination [PDF]

open access: yes, 2015
The performance of OFDM systems over a multipath channel can strongly degrade due to the propagation delay spread. The distortion of the received signal over the fast Fourier transform window is referred to as multipath noise.
Heereman, Frédéric   +4 more
core   +2 more sources

Measurement and Statistical Analysis of Distinguishable Multipaths in Underground Tunnels

open access: yesInternational Journal of Antennas and Propagation, 2020
Compared with the line-of-sight (LOS) condition, the multipath effect is more serious in the non-line-of-sight (NLOS) condition. Therefore, the LOS and NLOS identification is necessary for the multipath analysis of signal propagation.
Junchang Sun   +4 more
doaj   +1 more source

Experimental analysis of dense multipath components in an industrial environment [PDF]

open access: yes, 2013
This work presents an analysis of dense multipath components (DMC) in an industrial workshop. Radio channel sounding was performed with a vector network analyzer and virtual antenna arrays.
Gaillot, Davy P   +4 more
core   +4 more sources

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