A5100625169- Advanced Fiber Optic Sensors
- Optical Wireless Communication Technologies
- Magnetic and transport properties of perovskites and related materials
- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Advanced Condensed Matter Physics
- Photonic and Optical Devices
- Multiferroics and related materials
- Energy Harvesting in Wireless Networks
- Advanced MIMO Systems Optimization
- Rare-earth and actinide compounds
- PAPR reduction in OFDM
- Magnetic Properties of Alloys
- Electromagnetic Compatibility and Measurements
- Underwater Vehicles and Communication Systems
- Advanced Measurement and Detection Methods
- Antenna Design and Analysis
- Electromagnetic Compatibility and Noise Suppression
- Semiconductor Lasers and Optical Devices
- Thermal Expansion and Ionic Conductivity
- Wireless Power Transfer Systems
- Integrated Circuits and Semiconductor Failure Analysis
- Refrigeration and Air Conditioning Technologies
- Catalysis and Oxidation Reactions
Xidian University
2012-2025
University of Electronic Science and Technology of China
2024
Northwestern Polytechnical University
2019-2024
Xi’an University
2019-2024
China Electronics Technology Group Corporation
2023-2024
Shenyang University of Technology
2024
Taiyuan University of Technology
2018-2023
PLA Academy of Military Science
2023
Kunming University of Science and Technology
2006-2022
China Electronics Corporation (China)
2017-2021
The optical fiber acoustic sensing system is suitable for long-distance monitoring of the signals generated by external disturbances. According to continuity units, quasi-distributed and distributed technologies are differentiated meet different application requirements. On one hand, recent progress Fabry-Perot interferometer (FPI) focusing on diaphragm material, research hotspots in field continuous Fiber Bragg grating (FBG) array firstly reviewed. other Mach-Zehnder interferometry (MZI),...
Semitransparent perovskite solar cells (PSCs) that possess a high-power conversion efficiency (PCE) and high average visible light transmittance (AVT) can be employed in applications such as photovoltaic windows. In this study, bifacial modification comprising buried layer of [4-(3,6-Dimethyl-9H-carbazol-9-yl) butyl] phosphonic acid (Me-4PACz) surface passivator 2-(2-Thienyl) ethylamine hydroiodide (2-TEAI) was proposed to enhance device performance. When the concentrations Me-4PACz 2-TEAI...
Recently, visible light communication (VLC) based on LEDs has attracted much attention. In order to realize multiusers indoor VLC systems, a reasonable channel model considering random shadowing, which is first proposed the best of our knowledge, significant. Taking nonquantitative obstructions with movement into account, by introducing Poisson process and probability density function, we propose weighting function set up model. The expressions received optical power, horizontal illuminance...
Optical wireless communication is an energy-efficient and cost-effective solution for high-speed highly-secure connections. In this paper, we compare, discuss, analyze three popular optical orthogonal frequency division multiplexing (OFDM) techniques, such as DC-biased OFDM (DCO-OFDM), asymmetrically-clipped (ACO-OFDM), unipolar (U-OFDM), underwater systems. The peak power constraint, bandwidth limit of the light source, turbulence fading channel, channel estimation error are taken into...
The structure and magnetic properties of Y2Al3Fe14−xMnx (x=0–12) compounds have been investigated by means x-ray diffraction magnetization measurements. a hexagonal Th2Ni17-type structure. Their unit-cell volumes increase slowly with increasing x first, then increases rapidly the further x. This implies that there exists positive spontaneous volume magnetostriction in state compounds. X-ray Y2Al3Fe11Mn3 compound from 150 to 300 K shows appears negative coefficient thermal expansion,...
Phase-drift elimination is crucial to vibration recovery in the coherent detection phase-sensitive optical time domain reflectometry system. The phase drift drives whole signal fluctuation as a baseline, and its negative effect obvious when long. In this paper, empirical mode decomposition (EMD) presented extract eliminate adaptively. It decomposes by utilizing characteristic scale of data, baseline eventually obtained. validated theory experiment that deteriorates seriously length region...
There are many modulation methods suitable for optical wireless communication. OOK, PPM adopted widely in communication its high average-power-efficiency. DPPM, DPIM and DH-PIM three new communication, which may be the substitutes of because their better performance power efficiency bandwidth efficiency. In this paper, combination characteristic atmospheric channel, efficiency, transmission capacity, slot error rate typical schemes as PPM, communications analyzed. Theoretical analysis...
The frequency division multiplexing (FDM) is an effective method to improve the detection ability of high-frequency disturbance in phase-sensitive optical time domain reflectometer (ϕ-OTDR). However, as probe channels increase, crosstalk between will be generated. As a result, recovery phase signal-to-noise ratio (SNR) deteriorated, which reduce capability ϕ-OTDR. Therefore, novel for suppressing noise by compressed sensing under multi-frequency ϕ-OTDR proposed this paper. band-limited...
Ultra high frequency radio identification (UHF RFID) systems can use passive tags to reflect the signal from reader's transmitting antenna back receiving for information delivery. This gives a cascaded channel that is product of two fading components. In this work, probability detection, defined as received power above receiver sensitivity, derived when components suffer correlated generalized Rician fading. includes Rayleigh, Rician, and Nakagami-$m$ channels in literature special cases....
Order tracking plays an important role in non-stationary vibration analysis of rotating machinery, especially to run-up or coast down. An instantaneous frequency estimation (IFE) based order machinery is introduced. In which, a peak search algorithms spectrogram time-frequency employed obtain IFE vibrations. improvement proposed, which can avoid strong non-order components noises disturbing the work. Compared with traditional methods tracking, simplified application and only software...
A novel vibration location method with nested pulses for distributed optical fiber sensing system is proposed. The interferometric structure detection and pulse firstly designed. continuous-wave light modulated into a series of periodic in the linear Sagnac interferometer. Each contains certain number sub to locate position signal help envelope derivation threshold judgment. Experimental results show feasibility signals at different positions long-range fiber, positioning error 10m 0.5 km 26...
In this paper, we consider a wireless powered communication (WPC) network consisting of one hybrid access point (H-AP) and K nodes. The H-AP broadcasts energy to nodes in the downlink receives information from abided by TDMA protocol uplink. have harvesting capabilities can harvest other different assigned time slots. We propose two new schemes for WPC that perform among peer first scheme, each node harvests transmitting previous slots, while all second scheme. maximization sum achievable...