Results 21 to 30 of about 250,256 (245)

Modified Blind Equalization Algorithm Based on Cyclostationarity for Contaminated Reference Signal in Airborne PBR

open access: yesSensors, 2020
In airborne passive bistatic radar (PBR), the reference channel toward the opportunity illuminator is applied to receive the direct-path signal as the reference signal. In the actual scenario, the reference signal is contaminated by the multipath signals
Shuai Guo, Jun Wang, Hui Ma, Jipeng Wang
doaj   +1 more source

Applicability of the ultra-high radio frequency band (UHF) for hydrometeor detection by phase difference method

open access: yesContributions to Geophysics and Geodesy, 2021
Hydrometeors (rain, fog and ice crystals) affect the transmission of electromagnetic signals. Previous research showed that alterations in the signal (amplitude and phase) are affected by the composition of the atmosphere, e.g.
Peter FABO   +4 more
doaj   +1 more source

Effects of Cancer Treatment on Somatosensory and Nociceptive Processing in Children and Adolescents: A Systematic Review

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Chemotherapy‐induced peripheral neuropathy remains a major complication in pediatric cancer, with disrupted somatosensory and nociceptive processing being a key aspect. This review synthesizes empirical studies on alterations in somatosensory and nociceptive processing in children and adolescents with cancer.
Julia Schweiger   +4 more
wiley   +1 more source

Fusion of SoOp, photogrammetry and 3D map for indoor positioning system on smart devices

open access: yesAlexandria Engineering Journal
The growing demand for Indoor Location-Based Services (ILBS) highlights the need for accurate and infrastructure-free Indoor Positioning Systems (IPS), as traditional Global Navigation Satellite Systems (GNSS) usually lack accessibility indoors.
Yuan Yang, Charles Toth
doaj   +1 more source

Receiver architectures for positioning with low earth orbit satellite signals: a survey

open access: yesEURASIP Journal on Advances in Signal Processing, 2023
Positioning, Navigation and Timing (PNT) are services generally provided by Global Navigation Satellite Systems (GNSS). GNSS reside in medium to high orbital altitudes from the Earth’s surface, resulting in weak signal reception.
Christina Pinell   +3 more
doaj   +1 more source

Testing and Evaluation of Wi-Fi RTT Ranging Technology for Personal Mobility Applications

open access: yesSensors, 2023
The rapid growth in the technological advancements of the smartphone industry has classified contemporary smartphones as a low-cost and high quality indoor positioning tools requiring no additional infrastructure or equipment.
Manos Orfanos   +6 more
doaj   +1 more source

Exploring Preferences for a Digital Single‐Session Intervention for Adolescent Siblings of Youth With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Adolescent siblings of children with cancer are at elevated risk for psychosocial problems. Unfortunately, various barriers such as limited family time and resources, conflicting schedules, and psychosocial staffing constraints at cancer centers hinder sibling access to support.
Christina M. Amaro   +10 more
wiley   +1 more source

A research on low-earth-orbit signal-of-opportunity interference suppression algorithm based on adaptive signal iterative subspace projection technique

open access: yesFrontiers in Physics
Signal-of-Opportunity (SOP) positioning based on Low-Earth-Orbit (LEO) constellations has gradually become a research hotspot. LEO satellite SOP positioning possess strong anti-jamming capabilities due to their large quantity, wide spectral coverage, and
Lihao Yao   +10 more
doaj   +1 more source

Inter-frame Ambiguity Analysis and Suppression of LTE Signal for Passive Radar

open access: yesLeida xuebao, 2018
Long Term Evolution (LTE) is a new type of illuminators of opportunity for passive radars, with the advantages of broad bandwidth, high coverage, and strong generality.
Wang Benjing   +3 more
doaj   +1 more source

Navigation GPS/GLONASS in the Arctic and aurora [PDF]

open access: yesVestnik MGTU, 2016
The correspondence of the time-spatial distribution of the radiances of the aurora oval and time-spatial changes in the parameters of the navigation satellites' signal has been shown.
Chernouss S. A.   +3 more
doaj   +1 more source

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