Results 81 to 90 of about 1,422 (172)

Advances in Ligand‐Driven Pd‐Catalyzed C─H Functionalizations: Recent Insights and Updates

open access: yesChemCatChem, Volume 17, Issue 15, August 7, 2025.
The most significant advances in ligand‐driven Pd‐catalyzed organic synthesis over the past two years are presented. Processes involving C─H activation of substrates, avoiding their prefunctionalization are illustrated. Both the activity and selectivity of the catalyst depend on the design of the ligands (pyridones, pyridines, amino acids, phosphines ...
Jesús Moradell   +3 more
wiley   +1 more source

A Survey on Orthogonal Time Frequency Space Modulation

open access: yesIEEE Open Journal of the Communications Society
Orthogonal time frequency space (OTFS) modulation is strongly considered as a promising solution for high-mobility communications. In contrast to conventional modulation techniques, wherein information symbols are multiplexed in a one-dimensional time or
Mahmoud Aldababsa   +3 more
doaj   +1 more source

Modulation Classification for OTFS-NOMA in the presence of HPA Nonlinearity and Impulsive Noise [PDF]

open access: yes
Orthogonal Time Frequency Space (OTFS) is designed for high-speed communication scenarios where high-mobility users strain traditional bandwidth resources.
Bhatia, Vimal   +3 more
core   +1 more source

A Message Passing Detection based Affine Frequency Division Multiplexing Communication System

open access: yes, 2023
The next generation of wireless communication technology is anticipated to address the communication reliability challenges encountered in high-speed mobile communication scenarios.
Lin, Rongping   +4 more
core  

Orthogonal Time-Frequency Space (OTFS) Aided Media-Based Modulation System For 6G and Beyond Wireless Communications Networks

open access: yes2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
6 pages, 8 figures, 1 ...
Ozden, Burak Ahmet   +7 more
openaire   +3 more sources

Performance Analysis of OTFS Framework Over Wideband Time-Varying Channels

open access: yesIEEE Open Journal of the Communications Society
Orthogonal Time Frequency Space (OTFS) modulation has garnered significant attention for its robustness in high-mobility communication scenarios. Existing research predominantly focuses on narrowband time-varying channels, where Doppler effects manifest ...
Ziqiang Gao   +8 more
doaj   +1 more source

Outage analysis of OTFS system over time-varying and block time-varying Rician fading channels

open access: yesResults in Engineering
Orthogonal Time Frequency Space (OTFS) modulation is a potential radio interface technique for integrated terrestrial and non-terrestrial networks due to its resilience against severe Doppler spread and high carrier frequency offsets.
Vangara Saiprudhvi   +1 more
doaj   +1 more source

PAPR analysis in OTFS using the centre phase sequence matrix based PTS method

open access: yesResults in Optics
Orthogonal time–frequency space (OTFS) is a multicarrier modulation technique for high-speed data transfer in wireless communications. In an OTFS system, many subcarriers are used to send the modulated symbols. This makes OTFS signals have a high peak-to-
Arun Kumar   +3 more
doaj   +1 more source

Symbol interferometry and companding transform for PAPR reduction of OTFS signal

open access: yesETRI Journal
This paper presents methods for reducing the peak-to-average power ratio (PAPR) of the orthogonal time frequency space (OTFS) signal. These methods mainly consist of two operations: symbol interferometry (SI) and either μ-law or A-law companding.
Aare Gopal   +2 more
doaj   +1 more source

OTFS: A Potential Waveform for Space–Air–Ground Integrated Networks in 6G and Beyond

open access: yesTelecom
6G is expected to provide ubiquitous connectivity, particularly in remote and inaccessible environments, by integrating satellite and aerial networks with existing terrestrial networks, forming Space–Air–Ground Integrated Networks (SAGINs).
Obinna Okoyeigbo   +3 more
doaj   +1 more source

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