Results 31 to 40 of about 49,696 (296)

Space-Time Multiple-Mode Orthogonal Frequency Division Multiplexing With Index Modulation

open access: yesIEEE Access, 2017
Multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM) improves the spectral efficiency of the conventional OFDM-IM scheme by considering multiple distinguishable constellations for signal modulation.
Jun Li   +3 more
doaj   +1 more source

Sphere‐decoding based equalization for reduced‐zero‐padding orthogonal time frequency space modulation

open access: yesIET Communications, 2023
This work studies the equalization methods for the reduced zero‐padding version of the orthogonal time frequency space modulation. Here, the focus is on applications in low data rate scenarios such as the Internet of Things, and the case where the number
Yuan Zhang, Peng Du
doaj   +1 more source

Improving the chromatic dispersion tolerance in long-haul fibre links using the coherent optical orthogonal frequency division multiplexing [PDF]

open access: yes, 2010
Numerical simulations of the coherent optical orthogonal frequency division multiplexing modems are undertaken to investigate the effect of the adaptive modulation, the number of sub-carriers, the cyclic prefix (CP) length, the clipping ratio ...
Ghassemlooy, Zabih   +5 more
core   +1 more source

Orthogonal Time Frequency Space (OTFS) Modulation for Wireless Communications

open access: yesCoRR, 2022
Orthogonal time frequency space (OTFS) modulation is a recently proposed multi-carrier transmission scheme, which innovatively multiplexes the information symbols in the delay-Doppler (DD) domain instead of the conventional time-frequency (TF) domain. The DD domain symbol multiplexing gives rise to a direct interaction between the DD domain information
openaire   +2 more sources

Space-Time Block Coded and IQ-interleaved TCM, TTCM, BICM and BICM-ID Assisted OFDM [PDF]

open access: yes, 2003
Space-Time Block Coded (STBC) In-phase Quadrature-phase (IQ)-interleaved Coded Modulation (CM) schemes are proposed for Orthogonal Frequency Division Multiplexing (OFDM).
Ng, S.X.   +5 more
core   +1 more source

Hierarchically Guided Residual-Aware Equalization for Orthogonal Time Frequency Space Modulation

open access: yesIEEE Access
With the growing demand for high-mobility next-generation wireless environment, Orthogonal Time Frequency Space (OTFS) has emerged as the best transformative modulation technique due to its unique potential to provide reliable next-generation ...
B. M. Bergyl Jeslin, T. Deepa
doaj   +1 more source

Low-complexity iterative detection for orthogonal time frequency space modulation [PDF]

open access: yes2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018
6 pages, 7 ...
Patchava Raviteja   +4 more
openaire   +2 more sources

Circularly Pulse Shaped Orthogonal Time Frequency Space Modulation

open access: yesCoRR, 2019
Orthogonal time-frequency space (OTFS) modulation is a recently proposed waveform for efficient data transfer in high-speed vehicular scenarios. The use of rectangular pulse shape in OTFS results in high out of band (OoB) radiation, which is undesirable for multi-user scenarios.
Shashank Tiwari, Suvra Sekhar Das
openaire   +2 more sources

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

Cooperative transmission of UAV swarm using orthogonal time–frequency space modulation

open access: yesICT Express
Unmanned aerial vehicles (UAVs) emerge as versatile aerial nodes capable of dynamically filling coverage gaps and enabling mission-critical communication based on their mobile nature.
Usman Iqbal   +4 more
doaj   +1 more source

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