Results 41 to 50 of about 8,556,450 (194)
International Journal of Antennas and Propagation, 2020 The performance of wireless optical MIMO system with multiple pulse position modulation (MPPM) over correlated fading channel is investigated. The combined effects of atmospheric attenuation, atmospheric turbulence, and pointing error are taken into ...
Yue Zhang +3 more
doaj +1 more source
Periodic template compensation phase feeding method for phased array antenna
IET Microwaves, Antennas & Propagation, 2023 To minimise the beam‐pointing error caused by the digital phase shifter in phased array antenna systems, a periodic template compensation (PTC) phase feeding algorithm is proposed in this study.
Renli Zhang +3 more
doaj +1 more source
Optical Wireless Performance Monitoring Using Asynchronous Amplitude Histograms
IEEE Photonics Journal, 2021 Optical performance monitoring (OPM) aims to estimate the amount of distortion in optical networks. Its importance relies on building robust and efficient networks with self and dynamic diagnosis.
Maged Abdullah Esmail
doaj +1 more source
Modelling Error Rates in Temporal Pointing [PDF]
Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems, 2016 We present a novel model to predict error rates in temporal pointing. With temporal pointing, a target is about to appear within a limited time window for selection. Unlike in spatial pointing, there is no movement to control in the temporal domain; the user can only determine when to launch the response.
Oulasvirta, Antti, Lee, Byungjoo
openaire +3 more sources
Spatial Power Combining of DSSS Signals From a Sparse Array
IEEE Access, 2019 This paper generalizes the technique of spatial power combining to modulated signals and applies it to effectively strengthen or deny communications and navigation services in desired area.
Xiaofeng Ouyang +3 more
doaj +1 more source
Machine Learning-Based Beam Pointing Error Reduction for Satellite–Ground FSO Links
ElectronicsFree space optical (FSO) communication, which has the potential to meet the demand for high-data-rate communications between satellites and ground stations, requires accurate alignment between the transmitter and receiver to establish a line-of-sight ...
Nilesh Maharjan, Byung Wook Kim
semanticscholar +1 more source
Impact of angular pointing error on BER performance of underwater optical wireless links.
Optics Express, 2020 Even in clear ocean water, underwater optical wireless communication (UOWC) is impaired not only by absorption and scattering, but also by oceanic turbulence and dynamic pointing errors which result in a fading channel, degrading the bit error rate (BER)
R. Boluda-Ruiz +3 more
semanticscholar +1 more source
IEEE Access, 2023 The use of multiple transmitters in a turbulent free-space optical (FSO) communication link can enhance the systems performance because greater received power can improve receiver sensitivity. Nevertheless, the effect of having more power at the receiver
Jeremiah Oluwatosin Bandele +3 more
doaj +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction Patients requiring long‐term continuous renal replacement therapy (CRRT) generally have poor prognoses. This study evaluated whether adding continuous intravenous sodium infusion (cIVNa) is associated with improved hemodynamics and outcomes in patients undergoing long‐term CRRT for ≥ 7 days.
Akinori Yamaguchi +6 more
wiley +1 more source
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source