Results 41 to 50 of about 72,305 (269)

Analysis of LDPC Codes in FSO Communication System Under Fast Fading Channel Conditions

open access: yesIEEE Open Journal of the Communications Society, 2021
The free-space optical (FSO) communication represents a promising futuristic technology due to several benefits, which has attracted significant attention recently for various applications.
Sonali   +2 more
doaj   +1 more source

Mobile WiMAX: impact of mobility on the performance of limited feedback linear precoding [PDF]

open access: yes, 2010
The mobile WiMAX standard (802.16e) uses multiple-input multiple-output (MIMO) limited feedback linear precoding to exploit the channel state information at the transmitter.
Doufexi, A, Nix, AR, Tran, T
core   +2 more sources

Spatial, Spectral, and Polarization Multiplexed Ptychography

open access: yesFrontiers in Optics 2015, 2015
We introduce a novel coherent diffraction imaging technique based on ptychography that enables simultaneous full-field imaging of multiple, spatially separate, sample locations. This technique only requires that diffracted light from spatially separated sample sites be mutually incoherent at the detector, which can be achieved using multiple probes ...
Karl, R.   +11 more
openaire   +3 more sources

Spatial Multiplexing MIMO Visible Light Communications With Densely Distributed LEDs and PDs

open access: yesIEEE Photonics Journal, 2020
Multiple-input multiple-output visible light communications (MIMO-VLC) have been considered as an advanced technique owing to the enhancement of communication capacity and reliability.
Di Zheng, Hongming Zhang, Jian Song
doaj   +1 more source

Downlink Precoding for Massive MIMO Systems Exploiting Virtual Channel Model Sparsity

open access: yes, 2017
In this paper, the problem of designing a forward link linear precoder for Massive Multiple-Input Multiple-Output (MIMO) systems in conjunction with Quadrature Amplitude Modulation (QAM) is addressed.
Ayanoglu, Ender, Ketseoglou, Thomas
core   +1 more source

A measurement based feasibility study of space-frequency MIMO detection and decoding techniques for next generation wireless LANs [PDF]

open access: yes, 2001
This article presents a performance evaluation of various multi-antenna concepts based on OFDM for wireless LAN. The studies are based on state-of-the-art measured channel data.
Canagarajah, CN   +4 more
core   +4 more sources

Function‐driven design of a surrogate interleukin‐2 receptor ligand

open access: yesFEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang   +9 more
wiley   +1 more source

Square-Wave Spatial Optical Orthogonal Frequency-Division Multiplexing

open access: yesIEEE Photonics Journal
Visible light communication (VLC) systems leverage illumination devices, such as light-emitting diodes (LEDs), to serve a dual role as indoor high-speed communication downlinks.
Mohammed S. A. Mossaad   +5 more
doaj   +1 more source

Multiple ETS family transcription factors bind mutant p53 via distinct interaction regions

open access: yesFEBS Letters, EarlyView.
Mutant p53 gain‐of‐function is thought to be mediated by interaction with other transcription factors. We identify multiple ETS transcription factors that can bind mutant p53 and found that this interaction can be promoted by a PXXPP motif. ETS proteins that strongly bound mutant p53 were upregulated in ovarian cancer compared to ETS proteins that ...
Stephanie A. Metcalf   +6 more
wiley   +1 more source

Capacity and coverage enhancements of MIMO WLANs in realistic environments [PDF]

open access: yes, 2006
Recently, there has been an explosion of growth in research on MIMO systems, but little has been published characterising performance in realistic environments.
Beach, MA   +5 more
core   +2 more sources

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