Results 71 to 80 of about 186,820 (284)

Characteristics of the indoor propagation channel in 1.9 GHz band

Journal of Telecommunications and Information Technology, 2001
This paper presents results of propagation measurements carried out in the frequency range 1.8;nbsp;-
Krzysztof Kurek, Dariusz Janusek, Tomasz Kosiło   +2 more
doaj   +1 more source

Extending the impulse response in order to reduce errors due to impulse noise and signal fading [PDF]

A finite impulse response (FIR) digital smearing filter was designed to produce maximum intersymbol interference and maximum extension of the impulse response of the signal in a noiseless binary channel.
Rolls, Andrew J., Sirisena, H. R., Webb, Joseph A.   +2 more
core   +1 more source

Establishing a Model Precursor System: Over a Decade of Research on Carbon Dots from the Citric Acid‐Urea System

Advanced Functional Materials, EarlyView.
The citric acid/urea (CA‐Urea) precursor system offers a versatile, scalable route to carbon dots with tunable luminescence and multifunctionality. Mechanistic insights into precursor chemistry and reaction parameters have enabled doping, surface modification, and hybridization strategies, yielding CDs for luminescent devices, sensing, catalysis ...
Yupeng Liu, Zhiqi Cai, Xiangxin Sun, Hanyi Zhang, Yiming Hao, Jun Wu, Zekun Yan, Xue Wu, Yiqi Liang, Liming Wang, Songnan Qu   +10 more
wiley   +1 more source

Parameter Determination in Basis Pursuit Denoising via Stein’s Unbiased Risk Estimate for Underwater Acoustic Communication With Orthogonal Signal Division Multiplexing

IEEE Access
This paper proposes a novel method for determining parameters in underwater acoustic (UWA) communication using orthogonal signal division multiplexing (OSDM) combined with basis pursuit denoising (BPDN).
Ryoichi Ishijima, Tadashi Ebihara, Naoto Wakatsuki, Yuka Maeda, Koichi Mizutani   +4 more
doaj   +1 more source

Nonlinear Channel Estimation for OFDM System by Complex LS-SVM under High Mobility Conditions

, 2011
A nonlinear channel estimator using complex Least Square Support Vector Machines (LS-SVM) is proposed for pilot-aided OFDM system and applied to Long Term Evolution (LTE) downlink under high mobility conditions.
Charrada, Anis, Samet, Abdelaziz
core   +2 more sources

Multi‐Scale Interface Engineering of MXenes for Multifunctional Sensory Systems

Advanced Functional Materials, EarlyView.
MXenes, as two‐dimensional transition metal carbides and nitrides, demonstrate remarkable capabilities for multifunctional sensing applications. This review systematically examines multi‐scale interface engineering approaches that enhance sensing performance, enable diverse detection functionalities, and improve system‐level compatibility in MXene ...
Jiaying Liao, Sin‐Yi Pang, Jianhua Hao
wiley   +1 more source

Performance Analysis of the Anchor-free Localization Algorithm with Low-Complexity Method for Node Distance Estimation Enhancement Using ToA [PDF]

Journal of Electrical and Electronics Engineering, 2013
The Ultra Wide-Band (UWB) communication technology is used in ToA and these systems are capable resolving individual multipath components in the received Channel Impulse Response and determining their time of their arrival very precisely. In this article
CIPOV Vladimír, DOBOŠ Lubomír, PAPAJ Ján   +2 more
doaj  

Blind user detection in doubly-dispersive DS/CDMA channels

, 2009
In this work, we consider the problem of detecting the presence of a new user in a direct-sequence/code-division-multiple-access (DS/CDMA) system with a doubly-dispersive fading channel, and we propose a novel blind detection strategy which only requires
Buzzi, Stefano, De Maio, Antonio, Venturino, Luca, Zappone, Alessio   +3 more
core   +1 more source

Achieving High ON State Current through Ferroelectric Polarization‐Dependent Interfacial Resistance Switching in Undoped Orthorhombic HfO2 Films

Advanced Functional Materials, EarlyView.
Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand, Nuno Estrócio, Ji S. Kim, Babak Bakhit, Marian C. Istrate, Corneliu Ghica, Tiago Rebelo, Nives Strkalj, Abin Varghese, Bernardo Almeida, Luís S. Marques, Bipin Rajendran, Judith L. MacManus‐Driscoll, José P. B. Silva   +13 more
wiley   +1 more source

Bank Loan Supply and Monetary Policy Transmission in Germany: An Assessment Based on Matching Impulse Responses [PDF]

, 2005
This paper addresses the credit channel in Germany by using aggregate data. We present a stylized model of the banking firm in which banks decide on their loan supply in the light of expectations about the future course of monetary policy. Applying a VAR
Hülsewig, Oliver, Mayer, Eric, Wollmershäuser, Timo   +2 more
core   +2 more sources