Results 121 to 130 of about 9,390,790 (277)

Spektrale Effizienz und spektrale Umformung von Faster-than-Nyquist Signalen

, 2016
Capacity calculations for Faster-than-Nyquist (FTN) signaling are presented. When using root raised cosine (RRC) pulses, the spectral efficiency decreases monotonically with the roll-off factor.
El Hefnawy, Marwa Mohamed Ali Moustafa
core  

On faster than Nyquist signaling: Computing the minimum distance

, 1990
In this paper we are concerned with the problem of computing the minimum of the L2 norm taken over the interval (−δ, δ), 0 < δ ⩽ 12, and over all non-trivial linear combinations of the functions exp(2πinθ), n = 0, 1, …; the coefficients in the linear ...
Hajela, D
core   +1 more source

Synergistic Se‐Doping and Accompanying S‐Vacancies Drive Lattice Distortion and p‐Band Modulation for Enhanced Sodium Storage in Sulfides

Advanced Science, EarlyView.
Se‐doping in sulfides facilitates the creation of S vacancies. The collaboration of Se‐doping and S vacancies not only induces lattice distortion to weaken the M─S bonds and lift the p‐band center for improved Na+ adsorption, but also increases the number of charge carriers for an improved electronic conductivity.
Chunyang Xu, Jinfeng Liu, Biao Ma, Yawen Liang, Dongdong Wang, Chengcheng Miao, Jianhua Zhu, Liu Wang, Yunfeng Chao, Xinwei Cui   +9 more
wiley   +1 more source

Multicarrier faster-than-Nyquist transceivers: hardware architecture and performance analysis

, 2011
This paper evaluates the hardware aspects of multicarrier faster-than-Nyquist (FTN) signaling transceivers. The choice of time-frequency spacing of the symbols in an FTN system for improved bandwidth efficiency is targeted towards efficient hardware ...
Öwall, Viktor, Deepak Dasalukunte, Fredrik Rusek, Dasalukunte, Deepak, Rusek, Fredrik, Viktor Owall   +5 more
core   +1 more source

A Hybrid Network Integrating MHSA and 1D CNN–Bi-LSTM for Interference Mitigation in Faster-than-Nyquist MIMO Optical Wireless Communications

Photonics
To mitigate inter-symbol interference (ISI) caused by Faster-than-Nyquist (FTN) technology in a multiple input multiple output (MIMO) optical wireless communication (OWC) system, we propose an ISI cancellation algorithm that combines multi-head self ...
Minghua Cao, Qing Yang, Genxue Zhou, Yue Zhang, Xia Zhang, Huiqin Wang   +5 more
doaj   +1 more source

Electronic‐State Polarization Engineering‐Regulated Fluorinated Covalent Organic Framework Nanocables for Fast Lithium‐Ion Storage

Advanced Science, EarlyView.
Electronic‐state polarization engineering is realized by constructing fluorinated COF nanocables on conductive CNTs scaffolds. The polar C─F units generate localized electric fields and strong ion‐dipole interactions, promoting Li+ adsorption and transport.
Kaifu Xu, Jianfei Shi, Yuting Qin, Di He, Chengyin Wang, Tianyi Wang   +5 more
wiley   +1 more source

Highly Robust Sn‐Based MAX Anodes Constructed via Ti6C Octahedral Outer Immobilization and A‐Layer Fe Inner Anchoring for Long‐Life Lithium‐Ion Batteries

Advanced Science, EarlyView.
How can Sn‐based anodes achieve high capacity and long‐life cycling? This work unlocks the potential anode structure by confining Sn in the A layer of MAX phase with Ti6C octahedra as outer immobilization and Fe as inner anchors. The introduction of Fe dramatically strengthens the Ti–Sn bond to enhance structural integrity, modulate interfacial ...
Yu‐ang Lei, Yuchen Guo, Linkai He, Yi Tang, Junhui Zou, Yangyang Xie, Xiaodie Xuan, Zhao Bi, Yu Wang, Ting Liu, Yunqing Kang, Taotao Ai, Yusuke Yamauchi, Chenhui Yang   +13 more
wiley   +1 more source

Electrostatic Potential Complementarity for Thickness‐Tolerant Cathode Interlayers in High‐Efficiency Organic and Tandem Solar Cells

Advanced Science, EarlyView.
Two model molecules — trimesic acid (TMA) and phloroglucinol (PG) — with opposite central electrostatic potential (ESP) distributions are employed to elucidate how molecular electrostatic interactions regulate the cathode interlayer (CIL) PDINN. Electrostatic potential complementarity is revealed as the intrinsic origin of thickness sensitivity in CILs,
Xiaoman Ding, Dana Mukasheva, Jiaxu Che, Guangye Zhang, Xiuze Hei, Haoran Lin, Jie Lv, Patrick Fong, Zhiwei Ren, Annie Ng, Mingjian Yuan, Hongyu Zhang, Gang Li, Hanlin Hu   +13 more
wiley   +1 more source

One‐Step, High‐Removal‐Rate and Low‐Damage Chemical Mechanical Polishing of InP Enabled by Hydrolysis Activated PF6− with In Situ Fluoride Passivation

Advanced Science, EarlyView.
In this work, we propose a CMP method for InP using NH4PF₆, which hydrolyzes under In3+ catalysis to form reactive species. These convert InP into low‐binding‐energy fluorides, facilitating removal and dissolution. The process delivers high material removal rates, smooth surfaces, and fluorine passivation that lowers defect density and improves ...
Shigong Fu, Jianwei Zhou, Chenwei Wang, Yanchao Ge, Chong Luo, Yuhang Qi   +5 more
wiley   +1 more source

Bipolar Covalent Organic Frameworks Crafting Core–Shell Heterostructured Cathode for High–Performance Lithium–Organic Batteries

Advanced Science, EarlyView.
A bipolar CNT@COF core–shell heterostructure cathode constructed via synergistic molecular and microstructural engineering enables rapid electron/ion transport and efficient utilization of electroactive groups for high–performance lithium–organic batteries. ABSTRACT Covalent organic frameworks (COFs) with tunable molecular structures and ordered porous
Yalong Jiang, Nan Jiang, Yu Dou, Zixuan Chen, Yunhai Zhu, Long Chen, Yingkui Yang   +6 more
wiley   +1 more source