Results 31 to 40 of about 316,392 (313)
High Speed Visible Light Communication Using Blue GaN Laser Diodes [PDF]
, 2016 GaN-based laser diodes have been developed over the last 20 years making them desirable for many security and defence applications, in particular, free space laser communications.
Czernecki, R. +15 more
core +2 more sources
Single-Layer Phase Screen With Pointing Errors for Free Space Optical Communication
IEEE Access, 2021 Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, and it is generally used in free space optical communication (FSOC).
Xin Liu +4 more
doaj +1 more source
Adaptive symbol-rate free-space-optical communications [PDF]
2013 Australian Communications Theory Workshop (AusCTW), 2013 Free space optical communications through fading atmospheric channels can achieve improved throughput by using adaptive transmission techniques. This paper considers the use of adaptive symbol-rate and transmit-power methods. We use an idealised model of channel coding that assumes zero errors can be achieved above some SNR threshold and adjust the ...
Cowley, William G. +2 more
openaire +3 more sources
Free Space Optical Polarization De-multiplexing and Multiplexing by means of Conical Refraction [PDF]
, 2012 Polarization de-multiplexing and multiplexing by means of conical refraction is proposed to increase the channel capacity for free space optical communication applications.
Kalkandjiev, Todor K. +3 more
core +3 more sources
Buffer-Aided Max-Link Relaying for Free Space Optical Communication With Delay Constraints
IEEE Photonics Journal, 2022 In this paper, we introduce the concept of buffer-aided cooperative relaying for a free-space optical (FSO) communication system. The proposed FSO system consists of $K$ decode-and-forward(DF) relays, each equipped with a buffer of size $L$. The proposed
Ashish Kant Shukla, Manav R. Bhatnagar
doaj +1 more source
Fading testbed for free-space optical communications [PDF]
SPIE Proceedings, 2016 Free-space optical (FSO) communication is a very attractive technology offering very high throughput without spectral regulation constraints, yet allowing small antennas (telescopes) and tap-proof communication. However, the transmitted signal has to travel through the atmosphere where it gets influenced by atmospheric turbulence, causing scintillation
Amita Shrestha +5 more
openaire +2 more sources
Enhanced Neural Architecture for Real-Time Deep Learning Wavefront Sensing
SensorsTo achieve real-time deep learning wavefront sensing (DLWFS) of dynamic random wavefront distortions induced by atmospheric turbulence, this study proposes an enhanced wavefront sensing neural network (WFSNet) based on convolutional neural networks (CNN).
Jianyi Li +4 more
doaj +1 more source
Drones, 2023 Free-space optical (FSO) communication promises to bring fibre-like speeds to data transmissions between ground, sky and space. This is becoming more important in light of the increasing volume of data collected by aircraft and spacecraft. The University
Skevos F. E. Karpathakis +7 more
doaj +1 more source
Free-Space Quantum Key Distribution
, 2016 Based on the firm laws of physics rather than unproven foundations of mathematical complexity, quantum cryptography provides a radically different solution for encryption and promises unconditional security.
Carrasco-Casado, Alberto +2 more
core +1 more source
Quantum Relay-Assisted Free-Space Optical Communication
IEEE Photonics JournalRelay-based quantum communication utilizes intermediate nodes to extend the transmission distanceof quantum signals and mitigate the masking effect caused by obstacles or turbulence in free-space optical (FSO) channels.
Manav R. Bhatnagar +2 more
doaj +1 more source