Results 31 to 40 of about 1,422 (172)
IEEE Access, 2021 In the last few years, orthogonal time frequency space (OTFS) modulation has received significant attention as an alternative to OFDM especially for high mobilty scenarios.
Suvra Sekhar Das +3 more
doaj +1 more source
Large amplitude tip/tilt estimation by geometric diversity for multiple-aperture telescopes [PDF]
, 2017 A novel method nicknamed ELASTIC is proposed for the alignment of multiple-aperture telescopes, in particular segmented telescopes. It only needs the acquisition of two diversity images of an unresolved source, and is based on the computation of a ...
Cassaing, F. +2 more
core +2 more sources
Shack-Hartmann wavefront sensing with elongated sodium laser beacons: centroiding versus matched filtering [PDF]
, 2006 We describe modeling and simulation results for the Thirty Meter Telescope on the degradation of sodium laser guide star Shack-Hartmann wavefront sensor measurement accuracy that will occur due to the spatial structure and temporal variations of the ...
Ellerbroek, Brent, Gilles, Luc
core +1 more source
Angewandte Chemie, Volume 138, Issue 16, 13 April 2026.We report a pair of interconvertible palladium(II) cages assembled from an asymmetric ligand, whose switching is triggered by specific counter‐anions, tetrafluoroborate (BF4−) and bis(trifluoromethanesulfonyl)imide (NTf2−). Their complementary guest preferences enable orthogonal, multi‐cycle catch‐and‐release, exemplified by the selective purification ...
Zhe Li +2 more
wiley +2 more sources
Low pilot overhead channel estimation for CP‐OFDM‐based massive MIMO OTFS system
IET Communications, 2022 In high‐speed mobile scenarios, due to the high‐speed relative motion between transmitter and receiver, the high Doppler frequency shift interferes with the inter‐subcarrier orthogonality in orthogonal frequency‐division multiplexing (OFDM) systems ...
Tong Li +4 more
doaj +1 more source
Deep Learning-Based Signal Detection for Underwater Acoustic OTFS Communication
Journal of Marine Science and Engineering, 2022 Orthogonal time frequency space (OTFS) is a novel two-dimensional (2D) modulation technique that provides reliable communications over time- and frequency-selective channels.
Yuzhi Zhang +5 more
doaj +1 more source
4D Frequency Analysis of Computational Cameras for Depth of Field Extension [PDF]
, 2009 Depth of field (DOF), the range of scene depths that appear sharp in a photograph, poses a fundamental tradeoff in photography---wide apertures are important to reduce imaging noise, but they also increase defocus blur.
Anat Levin +5 more
core +3 more sources
Extended GFDM Framework: OTFS and GFDM Comparison
, 2018 Orthogonal time frequency space modulation (OTFS) has been recently proposed to achieve time and frequency diversity, especially in linear time-variant (LTV) channels with large Doppler frequencies.
Chafii, Marwa +3 more
core +1 more source
Survey of channel estimation method in delay-Doppler domain for OTFS
Tongxin xuebao, 2022 In order to provide reliable communication service for high-mobility scenarios, 6G can consider DD (delay-Doppler) domain based OTFS (orthogonal time frequency space) as its modulation scheme.By mapping the transmitted symbols onto DD domain and ...
Wang XING +4 more
doaj +2 more sources
Model-Driven Deep-Learning-Based Underwater Acoustic OTFS Channel Estimation
Journal of Marine Science and Engineering, 2023 Accurate channel estimation is the fundamental requirement for recovering underwater acoustic orthogonal time–frequency space (OTFS) modulation signals.
Yuzhi Zhang +4 more
doaj +1 more source