Results 31 to 40 of about 17,709 (313)
PSF reconstruction for NAOS-CONICA [PDF]
, 2006 Adaptive optics (AO) allows one to derive the point spread function (PSF) simultaneously to the science image, which is a major advantage in post-processing tasks such as astrometry/photometry or deconvolution.
Ageorges, Nancy +9 more
core +6 more sources
Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO [PDF]
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019 Orthogonal time frequency space (OTFS) modulation outperforms orthogonal frequency division multiplexing (OFDM) in high-mobility scenarios. One challenge for OTFS massive MIMO is downlink channel estimation due to the required high pilot overhead.
Wenqian Shen +4 more
semanticscholar +1 more source
IEEE Internet of Things Journal, 2023 The recently developed reconfigurable intelligent surfaces (RISs) are capable of improving the coverage of space–air–ground integrated networks (SAGINs), where the signals can be reflected in the desired direction without relying on power-thirsty radio ...
Chao Xu +7 more
semanticscholar +1 more source
Radar Sensing via OTFS Signaling: A Delay Doppler Signal Processing Perspective [PDF]
ICC 2023 - IEEE International Conference on Communications, 2023 The recently proposed orthogonal time frequency space (OTFS) modulation multiplexes data symbols in the delay-Doppler (DD) domain. Since the range and velocity, which can be derived from the delay and Doppler shifts, are the parameters of interest for ...
Kecheng Zhang +6 more
semanticscholar +1 more source
Characterization of digital dispersive spectrometers by low coherence interferometry [PDF]
, 2017 We propose a procedure to determine the spectral response of digital dispersive spectrometers without previous knowledge of any parameter of the system.
Izquierdo, J. G. +4 more
core +2 more sources
Low complexity LMMSE Receiver for OTFS [PDF]
IEEE Communications Letters, 2019 Accepted for Publication in IEEE Comm ...
Shashank Tiwari +2 more
openaire +2 more sources
Experimental and modeling study of drug release from HPMC-based erodible oral thin films [PDF]
, 2018 In this work hydroxypropyl methylcellulose (HPMC) fast-dissolving thin films for oral administration are investigated. Furosemide (Class IV of the Biopharmaceutical Classification System) has been used as a model drug for in vitro release tests using ...
Adrover, Alessandra +6 more
core +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
OTFS-SCMA: A Downlink NOMA Scheme for Massive Connectivity in High Mobility Channels [PDF]
IEEE Transactions on Wireless Communications, 2023 This paper studies a downlink system that combines orthogonal-time-frequency-space (OTFS) modulation and sparse code multiple access (SCMA) to support massive connectivity in high-mobility environments.
Haifeng Wen +3 more
semanticscholar +1 more source
CoRR, 2020 Orthogonal Time Frequency Space (OTFS) is a $\text{2-D}$ modulation technique that has the potential to overcome the challenges faced by orthogonal frequency division multiplexing (OFDM) in high Doppler environments. The performance of OTFS in a multi-user scenario with orthogonal multiple access (OMA) techniques has been impressive.
Kuntal Deka +2 more
openaire +2 more sources