Results 71 to 80 of about 9,390,790 (277)

Sub-nyquist sampling techniques [PDF]

, 1990
A number of novel theoretical methods have been developed in an attempt to analyse data produced by sampling a signal at below the Nyquist rate and the limitations of the approaches have been investigated.
Bagshaw, Paul Christopher
core  

Scientist deduced the existence of particles with faster-than-light speeds recently discovered by CERN [PDF]

, 2011
In this paper we present a short survey on Smarandache Hypothesis that there is no speed barrier in the universe and one can construct arbitrary speeds, hypothesis which has been partially confirmed by the recent CERN results of OPERA team led by Dr ...
Patrascu, Ion
core   +1 more source

Low Complexity Message Passing Receiver for Faster-Than-Nyquist Signaling in Nonlinear Channels

IEEE Access, 2018
The modern and future communication systems demand higher data rate exceeds current capabilities. Faster-than-Nyquist (FTN) signaling is a promising technique for the reason it can improve the spectral efficiency.
Xiaojie Wen, Weijie Yuan, Dewei Yang, Nan Wu, Jingming Kuang   +4 more
doaj   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

Novel Intersymbol Interference Cancellation Scheme to Enable Parallel Computational and High-Performance Faster-Than-Nyquist Signaling

IEEE Access, 2017
In this paper, we deal with the intersymbol interference (ISI) cancellation problem induced by the faster-than-Nyquist (FTN) signaling. In the traditional FTN signaling, the detection delay at the receiver depends on the number of states of the ISI ...
Bin Qian, Xiaokang Wang, Jinming Wen, Shengli Zhang, Changsheng Chen   +4 more
doaj   +1 more source

Electro‐Steric Ion Confinement in Polyelectrolyte Networks for Robust Nonvolatile Artificial Synapse

Advanced Functional Materials, EarlyView.
Polyelectrolyte stoichiometry governs ion transport and retention in electrolyte‐gated synaptic transistors. A PSS‐rich network creates electro‐steric ion confinement that suppresses ion back‐diffusion and stabilizes channel doping, enabling robust nonvolatile synaptic memory, linear weight updates, and low‐energy operation.
Donghwa Lee, Jinbo Kim, Myeongjin An, Jisoo Park, Junho Sung, Eunsung Hwang, Suhwan Seok, Seong‐Min Bak, Jeonghun Kim, Eunho Lee   +9 more
wiley   +1 more source

Impact of spectrum sharing on the efficiency of Faster-Than-Nyquist signaling [PDF]

2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014
Capacity computations are presented for Faster-Than-Nyquist (FTN) signaling in the presence of interference from neighboring frequency bands. It is shown that Shannon's sinc pulses maximize the spectral efficiency for a multi-access channel, where spectral efficiency is defined as the sum rate in bits per second per Hertz. Comparisons using root raised
Marwa El Hefnawy, Gerhard Kramer
openaire   +2 more sources

Reduced-Complexity MIMO Faster-Than-Nyquist Signaling Transceiver for OTFS Modulation

IEEE Open Journal of the Communications Society
This paper proposes a novel reduced-complexity detection scheme for multiple-input multiple-output (MIMO)-assisted faster-than-Nyquist (FTN) signaling scheme in the frequency selective fading channels.
Zekun Hong, Shinya Sugiura
doaj   +1 more source

Enhancement of Dielectric Breakdown Strength and Recoverable Energy Density in Three‐Dimensional Heterointerfaces on BaTiO3–PbZrO3–PbTiO3 Films via Room‐Temperature Nano‐Clustering

Advanced Functional Materials, EarlyView.
A room‐temperature aerosol deposition process yields multiphase nano‐clustered dielectric capacitors containing discrete BaTiO3, PbZrO3, and PbTiO3 crystals. This architecture creates three‐dimensional heterointerfaces that induce interfacial charge trapping and effectively inhibit breakdown propagation.
Hyunseok Song, Ke Xu, Donggeon Baek, Dayeong Hur, Minjae Kim, Hyun‐Cheol Song, Dae‐Yong Jeong, Houbing Huang, Jungho Ryu   +8 more
wiley   +1 more source

Unique faster‐than‐Nyquist transceiver of the ACM system

IET Communications, 2018
The link adaptive transmission system chooses the optimum combinations of modulation order and code rate according to the characteristics of wireless channels to make use of the channel resources. To improve the spectral efficiency further, the authors apply the faster‐than‐Nyquist (FTN) signalling to the adaptive coding and modulation (ACM) system ...
Ke Wang 0010, Aijun Liu 0001, Xiaohu Liang, Siming Peng   +3 more
openaire   +1 more source