The unmanned aerial vehicle (UAV) assisted transmission can significantly improve the spectrum efficiency and coverage of wireless communication network. paper proposed a cooperative secrecy mechanism, which take advantage transmitter signal primary user (PU) as dedicated radio frequency (RF) source with decode forward (DF) UAV selection energy harvesting (EH) under cognitive Specifically, transmitting PU in network be viewed used to drive secondary (SU) nodes multi-relay send signals. It...

This paper investigated the multiple unmanned aerial vehicle (UAV) relays' assisted network in Internet of Things (IoT) systems enhanced with energy harvesting order to overcome large-scale fading between source and sink as well achieve green cooperative communications, where time switch (TS) power splitting (PS) strategies were typically applied for UAV relays implement transmission, which was also selected via signal noise ratio (SNR) maximization criterion so that terminal node can obtain...

In view of the scarcity spectrum resources in wireless communication, it is studied this paper over two-hop cognitive secrecy transmission scheme decoding and forwarding (DF) unmanned aerial vehicles (UAVs) assisted relay with energy harvesting under Nakagami-m channel. It worth noting that terminal node equipped multiple antennas optimal antenna selection can be adopted for signal reception. Meanwhile, UAV uses time switching (TS) power splitting (PS) techniques adopts capacity scheme....

This paper presents a cost-effective localization method by using received signal strength (RSS) from single wireless access point (AP) that has only three directional antennas. To reduce the requirement for costly database training process, three-step parametric model-based approach is proposed. estimates AP-device angle, distance, and device location analytically making use of path-loss models, antenna radiation patterns, differential RSS. Meanwhile, gain introduced to eliminate need known...

Molten salt from the service environment leaches Y2O3 yttria-stabilized zirconia (YSZ), threatening security of thermal barrier coatings (TBCs). In this study, we compared molten corrosion resistances YSZ prepared via plasma-spraying physical vapor deposition (PS-PVD) before and after laser remelting. At 1000 °C, reacted with particulates in PS-PVD coating infiltrated gaps between quasi-columnar crystals, resulting phase transition column breakage. A dense glazed layer was formed on surface...

New location algorithms using Wi-Fi or/and magnetometer sensors are proposed considering the orientation impact on measurements. The feasibility of alone fingerprint positioning and inference is also assessed with real indoor data. Android smart devices low cost used to build up database along a Gaussian Processes Regression (GPR) model collect independent track test validate results. corresponding performance various solutions such as alone, magnetometer-aided compared. effects user's...

Self-homodyne coherent bidirectional (SHC-BiDi) scheme has gained much attention as a promising coherent-lite solution for datacenter interconnects (DCIs) recently. However, the twofold propagation loss of parallelly delivered signal and remote local oscillator (LO), well power split laser, severely restrict its budget, making it inapplicable metro-DCI networks until now. In this work, we propose reach-extended, cost-efficient SHC-BiDi suitable applications. Thereinto, two bidirectionally...

This paper focuses on a full-duplex (FD) two-way relay network with one base station (BS), FD amplify-and-forward (AF) relay, and user, the BS is equipped massive multiple-input multiple-output (MIMO) antennas. To reduce complexity cost of BS, proposes practical antenna selection way in to complete transmission networks optimize system performance outage probability or bit error ratio (BER). In proposed scheme, can implement transmit (AS) based instantaneous channel state information (CSI),...

Abstract Fast and accurate fault direction criteria are crucial for efficient protection in hybrid multi‐terminal HVDC transmission systems. The current variation method is commonly used to identify direction, but it affected by resistance distributed capacitance. This paper proposes a new criterion based on the backward travelling wave, which has stronger interference from transition operates at faster speed than other methods. Additionally, this provides time‐domain expression of wave...

MIMO (Multiple-Input Multiple-Output) radar is a new system, which can provide more observation channels than traditional array with the same number of elements. Based on far-field approximation, usual will lead to high azimuth grating lobes in near-field imaging. For designing imaging array, this paper analyzed reason area and proposed design method low based adding window transmit array. Finally, validity verified by simulation.

Abstract This paper proposed a system architecture model of two-hop unmanned aerial vehicle (UAV) relay wireless communication and designed an energy harvesting information transmission algorithm based on the harvested by UAV node. The nodes except source node can be obtained all transmitted signals via power splitting. Under advance non-static channel, user were configured with multiple antennas adopted max ratio combination (MRC). Based optimization criterion efficiency maximization,...

A new method to enhance Wi-Fi based indoor Pedestrian Dead Reckoning (PDR) in corridors by fusing uncalibrated security cameras is proposed this paper. An algorithm using infer a user's heading developed. Android devices and camera system are used build up an experimental platform for field data collection development/assessment. Experimental results have shown that incorporating estimates from cameras, the PDR performance improved.

In order to reduce the power consumption of receivers in coherent optical communication system during digital signal processing (DSP), a low complexity equalization scheme DSP flow 400Gb/s-DP-16QAM has been proposed. This is based on Fermat number transform (FNT), which sequentially performs static (SE) and dynamic (DE) domain. For different distances, proposed finds optimal solution under condition that length data bitwidth are mutually restricted transmission while achieving performance....

Accurate channel state information (CSI) is a primary prerequisite for intelligent reflecting surface (IRS) to achieve best performance in wireless communication systems. However, estimation IRS system challenging problem due high dimensions. In this article, we propose new network architecture estimating CSI IRS-aided systems based on condition generative adversarial (cGAN) with ResUnet. Specifically, ResUnet incorporated into cGAN reduce noise the process, expectation of obtaining more...

In practice, the modeling and analysis of nonlinear rotor-bearing systems are difficult due to nonlinearity complexity. previous studies, finite element simulation mathematical methods mostly adopted conduct analysis. However, time-consuming problem in lack sufficient prior knowledge modeling, traditional method is establish representation model. order overcome this issue, study, a data-driven model referred as NARX (Nonlinear Auto-Regressive with exogenous inputs) introduced system. The...

In this study, a new type of Al-TiO2-C-Er2O3 refiner was prepared by exothermic dispersion, and the added to ZL205 alloy investigate effect on refinement corrosion resistance alloy. The results reveal that, with increase in Er2O3 content, refining is first enhanced then reduced. best observed addition 6% Er2O3, which refined grain size from 147 μm 103.9 μm, 72% led improved bias agglomeration CuAl2 phase at boundaries reduced sensitivity alloy; moreover, α-Al nucleation temperature...

Fast and accurate fault direction criteria is crucial for efficient protection in hybrid multi-terminal HVDC transmission systems. The current variation method commonly used to identify but affected by resistance distributed capacitance. This paper proposes a new criterion based on the backward traveling-wave, which has stronger interference from transition operates at faster speed than other methods. Additionally, this provides time-domain expression of traveling wave after multiple...

By awakening the sensing capability of fractional Fourier transform (FrFT) synchronization pilot in digital subcarrier multiplexing (DSCM) coherent transmission systems, we realize 100-Gb/s 16QAM with a distributed acoustic (DAS) sensitivity 70 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{p}\varepsilon/\sqrt{\text{Hz}}$</tex> at spatial resolution 5 m.

&lt;p&gt;We propose an unsupervised blind fusion network that operates on a single HSI and RGB image pair requires neither known degradation models nor any training data. Our method takes full advantage of unrolling coordinate encoding to provide state-of-the-art reconstruction. It can also estimate the parameters relatively accurately through neural representation implicit regularization model.&lt;/p&gt;