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Development of Wind-Powered Smart Transition Electric Vehicle Charging Station
Published 2023-01-01“…The power industry is embracing green energy solutions to meet growing demand along with advancement in its technological innovations. …”
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Channel Characteristics of High-Speed Railway Station Based on Ray-Tracing Simulation at 5G mmWave Band
Published 2019-01-01“…Based on the ray-tracing simulation technology, this paper would study wireless channel characteristics of the three-dimensional (3D) model of high-speed railway station at the mmWave band. Key parameters such as path loss exponent, shadow fading factor, delay spread, Rician K-factor, angular spread, power angle spectrum, and spatial correlation are extracted and investigated. …”
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Development of Ultra-Broadband Base Station Antenna for All Mainstream LTE 700/800/900 MHz Frequency Bands
Published 2014-01-01“…In this work, we design and develop a dual-polarized base station antenna supporting 698 MHz to 960 MHz with an azimuth-plan half-power beam width of 90° covering all mainstream LTE 700/800/900 MHz frequency bands representing the widest low frequency range being actively used in the current mobile communication industry. …”
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Interference analysis of TD-LTE downlink signal on S-band pulse radar fuse Abstract:Concerning that the TD-LTE downlink signal and pulse radar fuze signal may be interfered within 2 300 to 2 400 MHz band of S-band,the method of calculating the signal-to-interference ratio at the pulse radar fuse receiver was used.And the isolation distance that the TD-LTE downlink signal did not interfere the pulse radar fuze signal under the condition of other factors determined was obtained.The validity of the conclusion through the link level simulation was verified.At the same time,it was also obtained when the horizontal distance between the two was isolated distance,the transmission power of the base station was increased (or the fuze transmission power was reduced),the ground effective reflection area was reduced,the fuse will also be interfered by TD-LTE downlink signal.
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Research on Protection Distances for Interference Between Earth Stations——Protection Distances for Interference from Fixed-SateIIite Earth Stations to Space Research Earth Stations...
Published 2014-06-01“…Fixed-satellite service earth stations and space research service earth stations parameters in the 8 400~8 500 MHz band were introduced.Then the interference from fixed-satellite earth stations to space research earth stations was examined and the required separation distances for protection of space research earth stations were calculated.For the protection of space research earth stations,both the non-geostationary-satellite and geostationary-satellite systems using maximum equivalent isotropically radiated power spectral density values allowed per“Radio Regulations”were covered.The result shows that required separation distances in the range from 542 km to 582 km around near-earth space research service earth stations would need to be established in order to meet the protection criteria of the near-earth space research earth station.…”
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Harmonic and Supra-Harmonic Emissions of Electric Vehicle Chargers: Modeling and Cumulative Impact Indices
Published 2024-01-01“…Numerical applications are carried out for both individuals and groups of EV chargers at a charging station. Results highlight the need for careful quantification of aggregated EV emissions, showing that supra-harmonic emissions are highly sensitive to variations in the power absorbed by EV chargers. …”
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Research on 5G base station radiation safety and corresponding network planning
Published 2021-09-01“…With the rapid development of 5G network, the radiation safety of base stations is a hot issue of public concern.As 5G has the characteristics of high frequency band and large bandwidth, ultra-dense heterogeneous network applications are becoming more common.The impact of electromagnetic radiation from typical 5G base stations on the human body was analyzed, and the safety distances of base stations with different powers were calculated in detail.Based on various common 5G base station equipment forms such as outdoor macro stations, outdoor pole stations, telephone booth base stations, and indoor micro stations, the safe area of different scenarios was analyzed and theoretically calculated.The results were verified based on field test and specific networking planning recommendations were proposed.…”
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IMT to Satellite Stochastic Interference Modeling and Coexistence Analysis of Upper 6 GHz-Band Service
Published 2023-01-01“…However, due to the presence of the existing satellite (SAT) services in these bands, it is crucial to evaluate the impact of the interference of terrestrial U6G stations to SAT systems. …”
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Compatibility study between IMT and inter-satellite service systems in 25.25~27.5 GHz frequency band
Published 2016-12-01“…In addition, the tradeoff between the total number of IMT BS and its transmission power was analyzed with certain interference margin.These results are useful for designing and deployment of IMT systems in 25.25~27.5 GHz band 5G spectrum planning in the future.…”
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Optimal downlink power allocation schemes for OFDM-NOMA-based Internet of things
Published 2022-01-01“…Second, we construct the downlink transmission rate maximizing problem subject to the total power. Then, to solve this problem, we divide it into three sub-problems: device grouping, inter-sub-band power allocation, and intra-sub-band power allocation problems. …”
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Rare Occasions: Tidal Disruption Events Rarely Power the AGNs Observed in Dwarf Galaxies
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Power Transmission for Millimeter-Wave Indoor/Outdoor Wearable IoT Devices Using Grounded Coplanar Waveguide-Fed On-Body Antenna
Published 2025-01-01“…The used empirical propagation models have shown that using an on-body <inline-formula> <tex-math notation="LaTeX">$9\times 9$ </tex-math></inline-formula> mm-wave rectenna array based on a proposed mm-wave antenna is able to charge IoT devices at a distance of 57 m for line-of-sight (LOS) indoor temporal environment, and at a distance of 10 m for LOS outdoor tropical propagation model using a base station with 53 dBm transmission power. Furthermore, the mm-wave on-body <inline-formula> <tex-math notation="LaTeX">$9\times 9$ </tex-math></inline-formula> rectenna array occupies an area equal to that of a single UHF rectenna, while collecting 17-fold more power. …”
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Millimeter-Wave Underlay D2D Communications: Channel Assignment, Transmission mode Selection and Power Control for Full-CSI and Limited-CSI Scenarios
Published 2024-02-01“…As the optimization problem is mixed-integer-non-linear programming, two heuristic algorithms are proposed, assuming full Channel Side Information (CSI) and limited CSI at Base Station, respectively. Simulation results show the superiority of utilizing FD relays over HD relays and direct transmission, especially for non-line-of-sight links, which is the dominant propagation mechanism in mmWave band. …”
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Design and implementation of NB-IoT based environmental temperature and humidity monitoring system
Published 2021-12-01“…In view of the disadvantages of the traditional environmental monitoring system, such as high power consumption, high maintenance cost and no real-time monitoring, an environmental temperature and humidity monitoring system based on narrow band Internet of things (NB-IoT) technology was developed, which is mainly controlled by singlechip microcomputer.The work flow of the main controller and the working mode of the communication module were optimized to reduce the power consumption of the system.NB-IoT communication technology was utilized for data transmission to the cloud platform through the base station and core network.China Mobile IoT open platform (OneNET platform) was adopted to achieve the connection between the terminal device and the application, and expanded functions provided by the platform was used to design a mobile phone application to achieve the remote real-time monitoring of environmental parameters and improve the user’s convenience.…”
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Electroacupuncture Treatment Alleviates the Remifentanil-Induced Hyperalgesia by Regulating the Activities of the Ventral Posterior Lateral Nucleus of the Thalamus Neurons in Rats
Published 2018-01-01“…Moreover, 2 Hz-EA reversed the RF-induced decrease both in PWT and PWL of rats and also abrogated the RF-induced augmentation of the spontaneous neuronal activity and the power spectral density (PSD) of the theta band oscillation in VPL LFP. …”
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Distributed Compressed Hyperspectral Sensing Imaging Incorporated Spectral Unmixing and Learning
Published 2022-01-01“…Compressed hyperspectral imaging is a powerful technique for satellite-borne and airborne sensors that can effectively shift the complex computational burden from the resource-constrained encoding side to a presumably more capable base-station decoder. …”
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Analysis of Radio Science Data from the KaT Instrument of the 3GM Experiment During JUICE’s Early Cruise Phase
Published 2025-01-01“…During the first payload checkout, the signal power at the KaT input closely matched the value expected at Jupiter, due to a specific ground station setup. …”
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BeiDou Satellites Assistant Determination by Receiving Other GNSS Downlink Signals
Published 2016-01-01“…GNSS’s orbit determinations always rely on ground station or intersatellite links (ISL). In the emergency of satellite-to-ground links and ISL break-off, BeiDou navigation satellite system (BDS) satellites cannot determine their orbits. …”
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Algorithm study of digital HPA predistortion using one novel memory type BP neural network
Published 2014-01-01“…Based on the characteristic analysis of the high power amplifier (HPA) in wide-band CMMB repeater stations,a novel neural network was proposed which can respectively process the memory effect and the nonlinear of power amplifier.The novel model based on real-valued time-delay neural networks(RVTDNN) uses the Levenberg-Marquardt (LM) optimization to iteratively update the coefficients of the neural network.Due to the new parameters w<sup>0</sup>in the novel NN model,the modified formulas of LM algorithm were provided.Next,in order to eliminate the over-fitting of LM algorithm,the Bayesian regularization algorithm was applied to the predistortion system.Additionally,the predistorter of CMMB repeater stations based on the indirect learning method was constructed to simulate the nonlinearity and memory effect of HPA.Simulation results show that both the NN models can improve system performance and reduce ACEPR (adjacent channel error power ratio ) by about 30 dB.Moreover,with the mean square error less than 10<sup>−6</sup>,the coefficient of network for FIR-NLNNN is about half of that for RVTDNN.Similarly,the times of multiplication and addition in the iterative process of FIR-NLNNN are about 25% of that for RVTDNN.…”
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