Results 41 to 50 of about 2,512,899 (272)
IEEE Access, 2020 In recent years, wideband spectrum sensing combined with sub-Nyquist sampling and compressed sensing technology in the field of cognitive radio has received widespread attention.
Jiai He, Wei Chen, Lu Jia, Tong Wang
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Defect-Engineered LiYO<sub>2</sub> Interlayers Enabling Fast Interfacial Li<sup>+</sup> Transport in All-Solid-State Batteries. [PDF]
Adv Sci (Weinh)Defect‐engineered LiYO2 interlayers are designed through aliovalent Zn2+ and Zr4+ substitution to regulate Li+ point‐defect chemistry in Ni‐rich cathodes. Compared with Li‐excess‐type LYZnO, Li‐vacancy‐type LYZrO enables faster Li+ transport, suppresses Li6PS5Cl decomposition, lowers interfacial resistance, and mitigates polarization growth, thereby ...
Kim S +6 more
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Impedance Spectroscopy Analysis of Perovskite Solar Cell Stability
Energies, 2023 The aim of this work is to investigate the degradation of perovskite solar cells (PSCs) by means of impedance spectroscopy, a highly sensitive characterization technique used to establish the electrical response of a device in a nondestructive manner. In
Ilaria Matacena +12 more
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B-Site Multi-Element Micro-Doping Engineered Air Electrodes With Fast Oxygen Kinetics for Reversible Protonic Ceramic Electrochemical Cells. [PDF]
Adv Sci (Weinh)Mo‐tuned multi‐element micro‐doping regulates redox chemistry, oxygen nonstoichiometry, hydration, and interfacial kinetics in PBSCF‐derived air electrodes for reversible protonic ceramic electrochemical cells. The cell with optimized PBSCFMNM03 air electrode delivers 1.10 W cm−2 in fuel cell mode and 1.88 A cm−2 at 1.3 V in electrolysis mode at 650 °C,
Yang W +9 more
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High-Fidelity Compressive Heart Rate Tracking
IEEE Access, 2023 Recently, photoplethysmography sensors in smart watches have been frequently used to monitor heart rate. Because a photoplethysmography sensor flashes light on the skin and measures the reflected light, the rate of flashing and sampling is directly ...
Seungyoon Nam +2 more
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Impact of Groundtrack Pattern of a Single Pair Mission on the Gravity Recovery Quality
Geosciences, 2018 For future gravity satellite missions, aliasing of high frequency geophysical signals into the lower frequencies is one of the most challenging obstacles to recovering true gravity signals, i.e., to recover the truth.
Siavash Iran-Pour +3 more
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Power Scalable Angle of Arrival Estimation Using Pilot Design With Orthogonal Subsequences
IEEE Open Journal of the Communications Society, 2021 Energy efficient array processing is critical to implement feasible solutions for directional communication in a mmWave channel. MmWave channels are highly susceptible to blockage and require frequent angle of arrival (AoA) estimation.
Mahbuba S. Ullah +2 more
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Xampling: analog to digital at sub-Nyquist rates
IET Circuits, Devices & Systems, 2011 15 pages, 22 ...
Moshe Mishali +3 more
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Blind sub-Nyquist GNSS signal detection [PDF]
2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2016 A satellite navigation receiver traditionally searches for positioning signals using an acquisition procedure. In situations, in which the required information is only a binary decision whether at least one positioning signal is present or absent, the procedure represents an unnecessarily complex solution.
Ondrej Daniel +6 more
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Sub-Nyquist Radar via Doppler Focusing [PDF]
IEEE Transactions on Signal Processing, 2014 We investigate the problem of a monostatic pulse-Doppler radar transceiver trying to detect targets, sparsely populated in the radar's unambiguous time-frequency region. Several past works employ compressed sensing (CS) algorithms to this type of problem, but either do not address sample rate reduction, impose constraints on the radar transmitter ...
Omer Bar-Ilan, Yonina C. Eldar
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