Results 71 to 80 of about 17,864 (202)

Neural Network–Assisted Metasurface Retroreflector With Wide‐Angle Adaptivity

Electron, Volume 4, Issue 2, May 2026.
This work proposes a wide‐angle, multi‐polarization, self‐sensing, and self‐adaptive intelligent metasurface retroreflector, with a planar profile and ultrathin thickness. By integrating a pre‐trained artificial neural network (ANN), the metasurface retroreflector can recognize the incident angle and promptly adapt to changes in the incoming wave.
Jing Ning, Xunfan Wang, Kun Duan, Weixu Yang, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng   +7 more
wiley   +1 more source

Joint Estimation of DOA and TDOA of Multiple Reflections by Matrix Pencil in Mobile Communications

IEEE Access, 2019
This paper presents the joint estimation of the direction of arrival (DOA) and the time difference of arrival (TDOA) for multipath signals, which is the central issue for mobile communications.
Yu Zheng, Yongzhi Yu
doaj   +1 more source

Cerebral Hemodynamic Changes During Cardiac Surgery: A Feasibility MR Study in Piglets

NMR in Biomedicine, Volume 39, Issue 5, May 2026.
Congenital heart disease surgery in infants requires cardiopulmonary bypass (CPB), which increases the risk of brain injury. Conventional heart‐lung machines (HLMs) cannot operate inside MRI scanners, limiting real‐time assessment of cerebral changes. We developed an MR‐conditional HLM and tested it in piglets during CPB.
Dominik T. Schulte, Ruth O'Gorman Tuura, Henning Richter, Michael Hofmann, Francesca del Chicca, Tobias Aigner, Christoph Loeschmann, Martina Lentini, Manuela Wieser, Frauke Seehusen, Rima Bektas, Melanie Zeilinger, Martin O. Schmiady, Marianne Schmid Daners   +13 more
wiley   +1 more source

A Novel Direction-of-Arrival Estimation via Phase Retrieval with Unknown Sensor Gain-and-Phase Errors

Sensors, 2019
In signal array processing, high-resolution direction-of-arrival (DOA) estimation algorithms work well on the assumption that the system models are perfect. However, in practicality, there are imperfect system models in which sensor gain-and-phase errors
Lingwen Zhang, Siliang Wu, Ao Guo, Wenkao Yang   +3 more
doaj   +1 more source

Super-resolution diffractive neural network for all-optical direction of arrival estimation beyond diffraction limits

Light: Science & Applications
Wireless sensing of the wave propagation direction from radio sources lays the foundation for communication, radar, navigation, etc. However, the existing signal processing paradigm for the direction of arrival estimation requires the radio frequency ...
Sheng Gao, Hang Chen, Yichen Wang, Zhengyang Duan, Haiou Zhang, Zhi Sun, Yuan Shen, Xing Lin   +7 more
semanticscholar   +1 more source

Selective Range Iterative Adaptive Approach for High-Resolution DOA Estimation

IEEE Access, 2019
In this paper, the problem of direction-of-arrival (DOA) estimation for a uniform linear array with single-snapshot observations is addressed. Two non-parametric DOA estimators are developed, which can be applied in any azimuth range with one snapshot ...
Yuan Chen, Long-Ting Huang, Hing Cheung So   +2 more
doaj   +1 more source

Satellite Interference Source Direction of Arrival (DOA) Estimation Based on Frequency Domain Covariance Matrix Reconstruction. [PDF]

Sensors (Basel), 2023
Yao J, Zhao C, Bai J, Ren Y, Wang Y, Miao J.   +5 more
europepmc   +1 more source

A comprehensive review of metasurface-assisted direction-of-arrival estimation

Nanophotonics
Direction of arrival (DoA) estimation is a key research focus in array signal processing, and numerous progressive direction-finding algorithms have already been developed.
Min Huang, Ruichen Li, Yijun Zou, Bin Zheng, Chao Qian, Hui Jin, Hongsheng Chen   +6 more
semanticscholar   +1 more source

Hybrid TDOA/DOA Multiple PD Localization Using Two Arrays With KPCA-mnc-FastICA and Sparrow Search Algorithm

IEEE Open Journal of Instrumentation and Measurement
Time difference of arrival (TDOA) and direction of arrival (DOA) are, respectively, applied to detect partial discharge (PD) target with ultrasonic signal.
Zeyu Zhang, Xiaojun Tang, Xiaoshan Li, Chongzhi Liu   +3 more
doaj   +1 more source

A Novel Method for DOA and Time Delay Joint Estimation in Multipath OFDM Environment

International Journal of Antennas and Propagation, 2020
Joint time delay and direction of arrival estimation based on uniform linear arrays in Orthogonal Frequency Division Multiplexing (OFDM) systems has to face the problems posed by coherent multipath environments and high computational complexity.
Xiangzhi Li, Weijia Cui, Haiyun Xu, Bin Ba, Yankui Zhang   +4 more
doaj   +1 more source