Results 41 to 50 of about 45,007 (228)

JOINT PROCESSING OF ENVELOPE ALIGNMENT AND PHASE COMPENSATION FOR ISAR IMAGING [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Range envelope alignment and phase compensation are spilt into two isolated parts in the classical methods of translational motion compensation in Inverse Synthetic Aperture Radar (ISAR) imaging.
T. Chen, G. Jin, Z. Dong
doaj   +1 more source

Super‐Robust Telecommunications Enabled by Topological Half‐Supermodes

Advanced Science, EarlyView.
Through topological half‐supermode engineering, we realize a valley‐ridge gap waveguide that is directly compatible with conventional waveguides and features topological protection. This design halves the lateral size via a PEC boundary, enabling direct TE₁₀‐mode matching and robust bend‐immune transmission.
Rui Zhou, Xintong Shi, Hai Lin, Yan Ren, Hang Liu, Zihao Yu, Jing Jin, Zhihao Lan, Menglin L. N. Chen   +8 more
wiley   +1 more source

Estimation of radio pulse parameters with linear frequency modulation

Радіоелектронні і комп'ютерні системи
The subject of this article is the process of estimating the parameters of a pulse signal with linear frequency modulation (LFM) used in airborne radar systems, particularly in synthetic aperture radars (SAR).
Volodymyr Pavlikov, Maksym Peretiatko, Volodymyr Trofymenko, Denys Kolesnikov   +3 more
doaj   +1 more source

Non‐Rayleigh Statistics of Ultrasonic Backscattered Echo from Tissues [PDF]

, 1994
The envelope of the backscattered signal from tissues can exhibit non‐Rayleigh statistics if the number density of scatterers is small or if the variations in the scattering cross sections are random. The K distribution which has been used extensively in
Molthen, Robert C., Narayanan, V. Manjo, Reid, J. M., Shankar, P. M.   +3 more
core   +1 more source

Envelope radar cross section analysis of faired composite bodies

Digest on Antennas and Propagation Society International Symposium, 2003
The authors describe a method that is useful for defining realistic looking models of complex scattering structures with faired junctions. The resulting models are also well suited for HF radar cross section (RCS) analysis. It is shown that the envelope technique is particularly useful for efficiently computing and displaying full volumetric RCS ...
B.J.E. Taute, W.D. Burnside, I.J. Gupta
openaire   +2 more sources

Liver Stiffness Rises Early in MASLD and Drives Inflammation, Lipid Dysmetabolism, and Fibrosis via Piezo1–YAP Mechanotransduction

Advanced Science, EarlyView.
Progressive stiffening of the hepatic extracellular matrix and free fatty acid overload activate the mechanosensor Piezo1 in steatotic hepatocytes, inducing calcium influx and nuclear translocation of Yes‐associated protein. YAP‐dependent nuclear signaling further drives inflammatory and fibrotic gene programs, lipid metabolic reprogramming, and ...
Juan Ma, Ning Xie, Ziwei Wang, Xiru Liang, Yulong Han, Qiang Zhao, Ming Wang, Hongwei Lu, Wanyi Kou, William Alazawi, Jinhai Wang, Lu Li, Ning Liu, Na Liu, Haitao Shi, Feng Xu   +15 more
wiley   +1 more source

Towards Dual-functional Radar-Communication Systems: Optimal Waveform Design [PDF]

, 2017
We focus on a dual-functional multi-input-multi-output (MIMO) radar-communication (RadCom) system, where a single transmitter communicates with downlink cellular users and detects radar targets simultaneously.
Li, Ang, Liu, Fan, Luo, Wu, Masouros, Christos, Petropulu, Athina, Zhou, Longfei   +5 more
core   +2 more sources

Citizen Engagement for Social and Technological Innovation in Sustainable Energy Systems

Advanced Energy and Sustainability Research, EarlyView.
This study underscores the potential of citizen participation in the energy transition by providing insights to foster citizen‐driven innovation. An analysis of energy communities, one of the most dynamic innovations in the energy sector, reveals that these models can be citizen‐led initiatives regarding their operational and organizational structure ...
Ana Belén Cristóbal, Cristina Sanz‐Cuadrado, Kiane Alves e Silva, Luis Narvarte   +3 more
wiley   +1 more source

Non-Contact Driver Respiration Rate Detection Technology Based on Suppression of Multipath Interference with Directional Antenna

Information, 2020
Non-contact driver respiration rate detection is a challenging problem in the Internet of Vehicles, because the automobile environment is much narrower, and thus the multipath effect is greater.
Fan Yang, Zhiming He, Shisheng Guo, Yuanhua Fu, Liang Li, Junfeng Lu, Kui Jiang   +6 more
doaj   +1 more source

Using EMD-FrFT filtering to mitigate high power interference in chirp tracking radars [PDF]

, 2011
This letter presents a new signal processing subsystem for conventional monopulse tracking radars that offers an improved solution to the problem of dealing with manmade high power interference (jamming).
Elgamel, Sherif, Soraghan, John
core   +1 more source