Results 81 to 90 of about 19,817 (256)

Joint DOA and frequency estimation with sub‐Nyquist sampling for more sources than sensors

IET Radar, Sonar & Navigation, 2017
Multiple antenna systems with sub‐Nyquist sampling technique have been applied to jointly estimate frequency and direction‐of‐arrival of narrowband far‐field signals.
Liang Liu, Ping Wei
doaj   +1 more source

Optimization Model Based Sub-Nyquist Sampling of Pulses With Various Shapes and Its Application to ECG Signals

IEEE Access, 2018
Recently developed variable pulse width finite rate of innovation (VPW-FRI) theory offers an efficient way for sampling pulse streams with various shapes at the sub-Nyquist rate.
Guoxing Huang, Ning Fu, Liyan Qiao
doaj   +1 more source

Multi‐Ion Doping Controlled CEI Formation in Structurally‐Stable High‐Energy Monoclinic‐Phase NASICON Cathodes for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
The graphical abstract illustrates the synthesis pathway, morphological feature, and thermodynamic feasibility of entropy‐engineered NASICON cathodes for sodium‐ion batteries. Abstract Overcoming the energy density limitations of sodium‐ion batteries (NIBs) requires innovative strategies to optimize cathode materials.
Sharad Dnyanu Pinjari, Vignesh Mahalingam, Purandas Mudavath, Malavika Aarayil, Tasdique Arman, Ipsita Pal, Dipan Kundu, Raghavan Ranganathan, Ashok Kumar Nanjundan, Rohit Ranganathan Gaddam   +9 more
wiley   +1 more source

Sub-Nyquist sampling for short pulses with Gabor frames

EURASIP Journal on Wireless Communications and Networking, 2017
For analog signals comprised of several, possibly overlapping, finite duration pulses with unknown shapes and time positions, an efficient sub-Nyquist sampling systems is based on Gabor frames.
Cheng Wang, Ying Wang, Peng Chen, Chen Meng, Xiangjun Song, Wanling Li   +5 more
doaj   +1 more source

F-region electron density and T_e / T_i measurements using incoherent scatter power data collected at ALTAIR [PDF]

Annales Geophysicae, 2006
The ALTAIR UHF radar was used in an incoherent scatter experiment to observe the low-latitude ionosphere during the Equis 2 rocket campaign. The measurements provided the first high-resolution electron density maps of the low-latitude D- and E ...
M. Milla, E. Kudeki
doaj   +1 more source

Xampling: analog to digital at sub-Nyquist rates

IET Circuits, Devices & Systems, 2011
15 pages, 22 ...
Mishali, Moshe, Eldar, Yonina C., Dounaevsky, Oleg, Shoshan, Eli   +3 more
openaire   +2 more sources

Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr3 Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting

Advanced Functional Materials, EarlyView.
The combination of formamidinium thiocyanate and 1,3‐propane diammonium iodide for bulk and top‐surface passivation, and a ternary fullerene blend to improve energy band alignment, suppresses energy losses in wide‐bandgap FAPbBr3 perovskite solar cells.
Laura Bellini, Daniël Grosfeld, Bruno Branco, Guus J. W. Aalbers, Lana M. Kessels, Willemijn H. M. Remmerswaal, Nicolas Daub, Kunal Datta, Martijn M. Wienk, René A. J. Janssen   +9 more
wiley   +1 more source

Sparse Detection Algorithms Based on Two-Dimensional Compressive Sensing for Sub-Nyquist Pulse Doppler Radar Systems

IEEE Access, 2019
Sub-Nyquist pulse Doppler radar system has received wide attention recently because it can make the sampling rate lower than the Nyquist sampling rate. However, there are still two problems that must be addressed for sub-Nyquist pulse Doppler radar.
Beiyi Liu, Yu Zhao, Xiaomei Zhu, Shinya Matsushita, Li Xu   +4 more
doaj   +1 more source

High‐Entropy Perovskite Nanofibers for Bifunctional Air Electrodes in Reversible Protonic Ceramic Electrochemical Cells

Advanced Functional Materials, EarlyView.
High‐entropy perovskite nanofibers serve as robust and active bifunctional air electrodes in reversible protonic ceramic electrochemical cells. Their compositional complexity stabilizes the lattice, enriches oxygen vacancies, and accelerates surface exchange.
Hyeonggeun Kim, Incheol Jeong, Seeun Oh, Dongyeon Kim, Kang Taek Lee   +4 more
wiley   +1 more source

A signal reconstruction method of wireless sensor network based on compressed sensing

EURASIP Journal on Wireless Communications and Networking, 2020
Compressed sensing (CS) is a new theory for sampling and recovering signal-based sparse transformation. This theory could help us to acquire complete signal at low cost.
Shiyu Zhu, Shanxiong Chen, Xihua Peng, Hailing Xiong, Sheng Wu   +4 more
doaj   +1 more source