Results 101 to 110 of about 6,360,179 (406)
Gridless sparsity-based DOA estimation for sparse linear array
The Journal of Engineering, 2019 A novel two-stage gridless sparsity-based method for sparse linear array direction-of-arrival (DOA) estimation is presented. First, the covariance matrix gridless sparse representation method based on atomic norm minimisation is proposed for ...
Yu Zhang +3 more
doaj +1 more source
OFDM Synthetic Aperture Radar Imaging with Sufficient Cyclic Prefix [PDF]
, 2014 The existing linear frequency modulated (LFM) (or step frequency) and random noise synthetic aperture radar (SAR) systems may correspond to the frequency hopping (FH) and direct sequence (DS) spread spectrum systems in the past second and third ...
Xia, Xiang-Gen, Zhang, Tian-Xian
core +1 more source
Optics Express, 2018 Extracting precise target characteristics from microwave image is needed and calls for high-resolution microwave imaging radar systems. In this paper, a Ka-band ultra-wideband microwave photonic (MWP) imaging radar is developed and experimentally ...
Anle Wang +11 more
semanticscholar +1 more source
CMOS‐Compatible Short‐Wave Infrared Linear Arrays of Ge‐on‐Si Avalanche Photodiodes
Advanced Photonics Research, EarlyView.The fabrication and characterization of a new type of surface‐illuminated Si‐based avalanche photodiode array operating in the short‐wave infrared region using germanium as the absorber and silicon as the multiplier is reported. The demonstration of an avalanche gain of 24 at a temperature of 378 K allows the devices to operate in outdoor environments.
Mrudul Modak +15 more
wiley +1 more source
Algorithms, 2018 This paper presents a fast algorithm for texture-less object recognition, which is designed to be robust to cluttered backgrounds and small transformations.
Hancheng Yu, Haibao Qin, Maoting Peng
doaj +1 more source
Chip-based photonic radar for high-resolution imaging
, 2019 Radar is the only sensor that can realize target imaging at all time and all weather, which would be a key technical enabler for future intelligent society.
Cong, Rong +8 more
core
3-D Microwave Imaging for Breast Cancer [PDF]
, 2012 We introduce a novel microwave imaging technique for breast cancer detection. Our approach provides a one-pass inverse image solution, which is completely new and unprecedented, unrelated to tomography or radar-based algorithms, and unburdened by the ...
Cheng, G. G., Grzesik, J., Zhu, Y.
core +2 more sources
Generalized radar/radiometry imaging problems
13th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2000. Conference Proceedings (IEEE Cat. No.00EX428), 2001 In the paper the results of spatio-temporal imaging simulation based on radar, synthetic aperture radar (SAR) and radiometry systems are presented. The analytical relationship between object scattering/emitting and the formed image is given and the general approach for the description of imaging system by means of Frendholm equation solution is ...
Prudyus, I. +4 more
openaire +4 more sources
Optical Chaos Generation and Applications
Advanced Photonics Research, EarlyView.This review comprehensively examines optical chaos generation via feedback, injection, and optoelectronic methods, emphasizing bandwidth enhancement and time‐delay suppression. Applications include chaos‐synchronized secure communication, physical random number generation, chaotic lidar for cm‐level detection, distributed fiber sensing, and terahertz ...
Wenhui Chen +8 more
wiley +1 more source
Advanced Theory and Simulations, EarlyView.This study explores machine learning‐driven prediction of fiber length characteristics in sustainable yarn blends made from recycled cotton and Lyocell. By analyzing empirical data through models like Random Forest and Gradient Boosting, and interpreting results with SHAP, key fiber length features from the Staple Diagram and Fibrogram are identified ...
Tuser Tirtha Biswas +2 more
wiley +1 more source