Results 41 to 50 of about 44,798 (233)

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

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

Noncontact Detection of Respiration Rate Based on Forward Scatter Radar

Sensors, 2019
Bioradar-based noncontact breathing detection technology has been widely studied due to its superior detection performance. In this paper, a breath detection mechanism based on the change in radar cross section (RCS) is proposed by using a forward ...
Fan Yang, Zhiming He, Yuanhua Fu, Liang Li, Kui Jiang, Fangyan Xie   +5 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

From Complex Shaping to Mirror Finish: Additive Manufacturing of Aerospace‐grade Cf/SiC Space Optics

Advanced Science, EarlyView.
An integrated additive manufacturing route combines selective laser sintering, engineered interphases, and optimized silicon infiltration to fabricate complex Cf/SiC composites. The approach enables precise shaping, high mechanical performance, and excellent optical reflectivity, offering a scalable solution for advanced aerospace optics with both ...
Buhao Zhang, Li Wang, Xiao Chen, Yuquan Wei, Huisheng Tian, Zhengren Huang, Xuejian Liu, Zhongming Chen, Jie Yin   +8 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

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

Meteorological balloon Patent [PDF]

, 1967
Aerodynamically stable meteorological balloon using surface roughness ...
Scoggins, J. R.
core   +1 more source

Scattering statistics of rock outcrops: Model-data comparisons and Bayesian inference using mixture distributions [PDF]

, 2019
The probability density function of the acoustic field amplitude scattered by the seafloor was measured in a rocky environment off the coast of Norway using a synthetic aperture sonar system, and is reported here in terms of the probability of false ...
Anthony P. Lyons, Bishop C. M., Crowther P. A., Derek R. Olson, Dong Y., Douglas A. Abraham, Farshchian M., Fossum T. G., Gauss R. C., Gelman A., Lyons A. P., Midtgaard Ø., Oppenheim A. V., Papoulis A., Titterington D. M., Torstein O. Sæbø, Ward K. D.   +16 more
core   +2 more sources