Results 131 to 140 of about 18,064 (298)

Joint mitigation of RF interference and ground clutter in an airborne surveillance radar system

, 2022
4 S.Ground Moving Target Indication is a key feature of modern airborne surveillance radar systems. In operational scenarios, the radar echos from moving targets will have to compete not only with ground clutter, but also with (both intentional and ...
Witter, M., Bürger, W.
core  

A Hydrogen Sulfide–Releasing Dynamic Hydrogel Modulates Coordinated Neurovascular, Immune, and Angiogenic Responses for Scar‐Suppressed Diabetic Wound Repair

Advanced Science, EarlyView.
ROS‐Responsive H2S Hydrogel (HAPPF) Coordinated Regeneration for High‐Quality Diabetic Wound Repair.A self‐regulating dynamic hydrogel is developed to deliver a fluorogenic H2S donor in response to excessive ROS. Released H2S acts as a master regulator to resolve chronic inflammation (M2 polarization), restore VEGF‐driven angiogenesis, and rebalance ...
Xuyang Ning, Ziqiang Zhou, Bangming Li, Hong Lu, Haoyang Wen, Zhoulong Huang, Gang Li, Ping Hu   +7 more
wiley   +1 more source

Radar anti-active jamming signal processing algorithm based on sparse reconstruction and deep learning

Dianzi Jishu Yingyong
In order to solve the problem of digital RF signal duplication interference and broadband noise interference threatening radar target detection, this paper proposes an interference suppression algorithm that combines sparse reconstruction and deep ...
Chen Wenrui, Liu Fang, Dai Guangzhao
doaj   +1 more source

Surface‐Spin‐Induced Magnetic Loss Enhancement in Ultralight Electromagnetic Absorbers

Advanced Science, EarlyView.
Fe3O4 nanoparticles with different hollow rates were synthesized to demonstrate the key role of surface moment in magnetic loss process. Using the same volume filling ratio, the 54.1% hollow Fe3O4 absorber represents about 20% enhancement in the imaginary part (μ'') than solid particles due to the coexisting magnetic resonance of inside and outside ...
Ruimin Ren, Ke Yang, Chichong Lu, Song Ma, Bowen Zheng, Zhenhui Ma   +5 more
wiley   +1 more source

MIMO radar array design based on unequal subarrays

四川大学学报. 自然科学版, 2017
The idea of dividing the transmitting array of MIMO radar into unequal subarrays was proposed in the paper. This kind of MIMO radar obtains the coherent processing gain and the waveform diversity gain which the MIMO radar with equal subarrays (called it ...
GU Shuai-Nan, LI Yu-Xiang, Zhao Feng, ZHENG Na-e   +3 more
doaj  

Three‐dimensional interferometric inverse synthetic aperture radar imaging of ship target based on cubic phase signal model

IET Radar, Sonar & Navigation
The interferometric inverse synthetic aperture radar (InISAR) system realises the interferometric processing on the imaging results obtained from three radars on a set of orthogonal baselines and can get the three‐dimensional (3D) imaging for the ship ...
Junting Yang, Yong Wang
doaj   +1 more source

Adaptive Subcarrier Selection With Iterative Refinement Frequency-Domain Interference Cancellation for OFDM-Based Joint Radar-Communication Systems

IEEE Access
This paper investigates a Joint Radar and Communication System that employs a unified Orthogonal Frequency-Division Multiplexing (OFDM) packet to simultaneously support both radar sensing and communication functions.
Thuan Kinh Quang Nguyen, Khuong Ho-van, Quoc Nam Le, Hien Q. Ta, Lap Luat Nguyen   +4 more
doaj   +1 more source

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source