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As ICT has been introduced into the traditional industrial field and the convergence industry environment has been developed, the industrial devices operated as closed networks are exposed to external networks, resulting in increased security vulnerability. If ICT networks with open and bi-directional features control industrial devices using unprotected industrial protocols, the physical and economic...
A fully integrated 3 – 5GHz CMOS transceiver SoC for WBAN is presented in this paper. To achieve the low power and low complexity, OOK receiver architecture and the digital impulse generator are employed. For the rejection of the undesired interferers, the tunable RF notch filter is integrated and measured results show more than 9 dB improvement of the sensitivity. The measured energy efficiency of...
By using radio propagation predictions of Rec. ITU-R P.1546 combined with geographic information, formulations for field calculation and interference analysis are presented in the VHF and UHF bands. To illustrate some computational results for given system parameters, virtual geographic information data are taken into account.
In this paper, performance improvement of MMIC Power Amplifier using InGaP/GaAs HBT process is studied. To meet 3.9G and 4G mobile communications service demand, a power amplifier with improved efficiency and linearity that utilizes the Doherty structure and gain-expansion drive-amplifier is designed and implemented. In the measurement results, proposed amplifier has P1dB of 27.3dBm, efficiency of...
Context-aware U-health services provide health services in which the computer recognizes various contexts that patients may face in real life. To recommend health services, it is necessary to define the context data and identify the data's relationship with exercise service recommendation factors. In this study, we identify the exercise recommendation factors related to context data to provide a U-health...
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