scholarly journals Transmit power measurement results of configured-maximum-transmit-power-controlled mobile phones in hospital

2021 ◽  
Author(s):  
Ryota Ishioka ◽  
Junji Higashiyama ◽  
Yasunori Suzuki ◽  
Keisuke Nagase
Keyword(s):  
Mobile Phones ◽  
Power Measurement ◽  
Transmit Power ◽  
Measurement Results ◽  
Maximum Transmit Power

scholarly journals Comparative Analysis of Power Measurement Results in the Testing of Sand Mixers

2013 ◽  
Vol 13 (3) ◽  
pp. 119-122
Author(s):  
K. Smyksy ◽  
R. Wrona ◽  
E. Ziółkowski
Keyword(s):  
Power Efficiency ◽  
Energy Input ◽  
Power Measurement ◽  
Manufacturing Processes ◽  
Measurement Equipment ◽  
Power Demand ◽  
Measurement Results ◽  
Wide Variability ◽  
Process Line ◽  
Variable Energy

Abstract Investigations of operating parameters of widely used sand mixers reveal a wide variability range in the values of parameters associated with their power demand. Power efficiency of manufacturing processes has received a great deal of attention lately, which encourages the research efforts to optimise this aspects of operation of machines and installations as well. In the first place these machines and installations have to work properly as a part of the process line- which applies also to moulding sand mixers. Experiments conducted by the authors suggest that the same goal can be achieved at variable energy input levels. To obtain information about the power demands of sand mixers requires the use of highly specialised equipment, methodology and result processing procedures. This study provides a brief characteristic of measurement equipment and results of measurements taken on a unit AG-015 (based on a roller mixer) and a laboratory rotor mixer.

scholarly journals Photon diagnostics at the FLASH THz beamline

2019 ◽  
Vol 26 (3) ◽  
pp. 700-707 ◽  
Author(s):  
Rui Pan ◽  
Ekaterina Zapolnova ◽  
Torsten Golz ◽  
Aleksandar J. Krmpot ◽  
Mihailo D. Rabasovic ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Power Measurement ◽  
Diagnostic Tools ◽  
Narrow Bandwidth ◽  
Spatial Beam ◽  
Measurement Results ◽  
Infrared Spectrometer ◽  
On Line ◽  
Transport Line ◽  
Range Jitter

The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. The unique features of the FLASH THz pulses and the accelerator source, however, bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles. Here, these challenges are discussed and the pulse diagnostic tools developed at FLASH are presented. In particular, a radiometric power measurement is presented that enables the derivation of the average pulse energy within a pulse burst across the spectral range, jitter-corrected electro-optical sampling for the full spectro-temporal pulse characterization, spatial beam profiling along the beam transport line and at the sample, and a lamellar grating based Fourier transform infrared spectrometer for the on-line assessment of the average THz pulse spectra. Corresponding measurement results provide a comprehensive insight into the THz beamline capabilities.

scholarly journals Maximum Transmit Power for UE in an LTE Small Cell Uplink

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 796 ◽  
Author(s):  
Amir Haider ◽  
Seung-Hoon Hwang
Keyword(s):  
Power Control ◽  
Network Performance ◽  
Fractional Power ◽  
Small Cell ◽  
Control Mode ◽  
Small Cells ◽  
Transmit Power ◽  
Lte Networks ◽  
Maximum Transmit Power ◽  
The Impact

To furnish the network with small cells, it is vital to consider parameters like cell size, interference in the network, and deployment strategies to maximize the network’s performance gains expected from small cells. With a small cell network, it is critical to analyze the impact of the uplink power control parameters on the network’s performance. In particular, the maximum transmit power (Pmax) for user equipment (UE) needs to be revisited for small cells, since it is a major contributor towards interference. In this work, the network performance was evaluated for different Pmax values for the small cell uplink. Various deployment scenarios for furnishing the existing macro layer in LTE networks with small cells were considered. The Pmax limit for a small cell uplink was evaluated for both homogenous small cell and heterogeneous networks (HetNet). The numerical results showed that it would be appropriate to adopt Pmax = 18 dBm in uniformly distributed small cells rather than Pmax = 23 dBm, as in macro environments. The choice of Pmax = 18 dBm was further validated for three HetNet deployment scenarios. A decrease of 0.52 dBm and an increase of 0.03 dBm and 3.29 dBm in the proposed Pmax = 18 dBm were observed for the three HetNet deployments, respectively. Furthermore, we propose that the fractional power control mode can be employed instead of the full compensation mode in small cell uplinks.

scholarly journals Relaying Communications in Energy Scavenging Cognitive Networks: Secrecy Outage Probability Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Khuong Ho-Van ◽  
Thiem Do-Dac
Keyword(s):  
Outage Probability ◽  
Cognitive Networks ◽  
Closed Form Expression ◽  
Energy Scavenging ◽  
Secondary Source ◽  
Secrecy Outage Probability ◽  
Transmit Power ◽  
Splitting Factor ◽  
Maximum Transmit Power ◽  
Secrecy Outage

This paper exploits a self-powered secondary relay to not only maintain but also secure communications between a secondary source and a secondary destination in cognitive radio networks when source-destination channel is unavailable. The relay scavenges energy from radio frequency (RF) signals of the primary transmitter and the secondary source and consumes the scavenged energy for its relaying activity. Under the maximum transmit power constraint, Rayleigh fading, the primary outage constraint, and the interference from the primary transmitter, this paper suggests an accurate closed-form expression of the secrecy outage probability to promptly assess the security performance of relaying communications in energy scavenging cognitive networks. The validity of the proposed expression is verified by computer simulations. Numerous results demonstrate the security performance saturation in the range of large maximum transmit power or high required outage probability of primary users. Moreover, the security performance is a function of several system parameters among which the relay’s position, the power splitting factor, and the time splitting factor can be optimized to achieve the minimum secrecy outage probability.

Impact of maximum transmit power limit on the first-order and second-order performance of cognitive opportunistic relaying

2015 ◽  
Vol 12 (5) ◽  
pp. 75-85 ◽  
Author(s):  
Xiangdong Jia ◽  
Pengfei Deng ◽  
Ming Zhou ◽  
Longxiang Yang ◽  
Hongbo Zhu
Keyword(s):  
Second Order ◽  
Opportunistic Relaying ◽  
Transmit Power ◽  
First Order ◽  
Maximum Transmit Power ◽  
Power Limit

scholarly journals A Categorized Resource Sharing Mechanism for Device-to-Device Communications in Cellular Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Jie Chen ◽  
Chang Liu ◽  
Husheng Li ◽  
Xulong Li ◽  
Shaoqian Li
Keyword(s):  
Resource Sharing ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
D2d Communications ◽  
Transmit Power ◽  
Minimization Principle ◽  
The Third ◽  
Key Technologies ◽  
Device To Device ◽  
Maximum Transmit Power

Device-to-Device (D2D) communications are considered one of the key technologies for 5G wireless communication systems. In this paper, a resource sharing mechanism, which applies different policies for different cases (thus being categorized), is proposed. In this scheme, all D2D pairs are divided into three groups by comparing the minimum transmit power with the maximum transmit power of each cellular UE. The proposed mechanism enables multiple D2D pairs in the second group to share the resource with cellular user equipment (UE) simultaneously, by adjusting the transmit powers of these D2D transmitters. At the same time, D2D pairs in the first group and the third group share resource with cellular UE based on the transmit power minimization principle. Simulation results show that the proposed scheme can achieve relatively higher network throughput and lower transmit power consumption of the D2D system.

A Novel Design for the Stackable Piezoelectric Power Generation Devices Conjunction with the Microelectric Energy Saving System

2013 ◽  
Vol 448-453 ◽  
pp. 2143-2148
Author(s):  
Ching Wu Wang ◽  
Ti Chun Yeh ◽  
Po Kai Lin ◽  
Ming Han Hsu ◽  
Kai Chun Lin ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Output Power ◽  
Power Dissipation ◽  
Piezoelectric Materials ◽  
Power Measurement ◽  
Time Duration ◽  
Measurement Results ◽  
Power Generation Device ◽  
Novel Design

An optimal design for the stackable four-layered piezoelectric power generation device and its microelectric energy saving method is presented here. In this work, three different device arrangements for the piezoelectric four-layered power generation devices were firstly deposited and compared for obtaining a greater output power. Measurement results demonstrated that Sample 2 among the three different device arrangements could not only avoid the damage to PZT-5H piezoelectric materials but also achieve a grater instantaneous output power (5.359mW). Subsequently, a novel microelectric energy saving system by constructing a less power dissipation boost converter IC with its proper surrounding circuit was also exhibited. Evidence showed that among the three different IC modules, Case 1 performs an optimal microelectric energy saving system since it could effectively fully charge a 30 mAh Zn-MnO2battery within the shortest time duration (4 hours).

A coaxial HOM coupler for a superconducting RF cavity and its low-power measurement results

2011 ◽  
Vol 35 (3) ◽  
pp. 301-307 ◽  
Author(s):  
An Sun ◽  
Ya-Zhe Tang ◽  
Li-Ping Zhang ◽  
Ying-Min Li
Keyword(s):  
Low Power ◽  
Power Measurement ◽  
Rf Cavity ◽  
Measurement Results ◽  
Superconducting Rf
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