A5032021587- Telecommunications and Broadcasting Technologies
- PAPR reduction in OFDM
- Microwave Engineering and Waveguides
- Electromagnetic Simulation and Numerical Methods
- Multimedia Communication and Technology
- Advanced Wireless Communication Techniques
- Energy Harvesting in Wireless Networks
- Radio Frequency Integrated Circuit Design
- Thin-Film Transistor Technologies
- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Electromagnetic Compatibility and Noise Suppression
- Gyrotron and Vacuum Electronics Research
- Wireless Body Area Networks
- Full-Duplex Wireless Communications
- Electrospun Nanofibers in Biomedical Applications
- Electrochemical sensors and biosensors
- Power Line Communications and Noise
- Conducting polymers and applications
- Video Coding and Compression Technologies
- Silicon and Solar Cell Technologies
- Advancements in PLL and VCO Technologies
- Advanced X-ray and CT Imaging
- Lubricants and Their Additives
- Antenna Design and Optimization
Korea Maritime and Ocean University
2017-2024
University of Michigan
2013-2021
Korea Aerospace University
2017
LG (United States)
2010
Chung-Ang University
2004-2006
Soonchunhyang University
1995-2002
This paper provides performance evaluations of two state-of-the-art terrestrial broadcasting systems, ATSC 3.0 and 3GPP Rel-17 5G broadcast, in terms physical layer capability, network deployment operating costs. The performances are evaluated the mobile environment, considering practical implementations handheld terminals. Extensive simulation results demonstrate that outperforms because well-designed bit interleaved coded modulation (BICM) time interleaver can mitigate deep signal fades....
This paper presents a fully-integrated IR-UWB radio, designed to operate within the limits of mm-scale micro-battery for cubic-mm sensor nodes. It includes an RF front-end, battery current limiter, baseband modem with I2C interface, and temperature-compensated relaxation oscillator frequency generation without crystal. The peak draw from modern must be <;100 μA, below radio's active power consumption. Thus, duty-cycling radio only at packet level is not option, so this integrated which...
Left-handed material (LHM) exhibiting negative permittivity and permeability in certain band has dispersive medium property varying with frequency. The effective function of this have a similar form Lorentz model. Piecewise linear recursive convolution (PLRC) technique for finite difference time domain (FDTD) method is applied to simulate the propagation characteristic LHM effectively. Modified anisotropic perfectly matched layer (APML) proposed absorbing boundary condition LHM. simulation...
This paper demonstrates new systematic approaches to equivalent circuit model extraction for defected ground structure (DGS) directly from full-wave frequency domain simulation. The DGS circuits being modeled may be either lossy or lossless. Adaptive sampling (AFS) is used minimize the computational effort of electromagnetic (EM) simulation while critically assisting in determining cutoff and attenuation pole location circuits. A simple without any optimization lumped element component...
This paper proposes an improved decoding scheme of emergency alert wake-up bits in Advanced Television Systems Committee (ATSC) 3.0. When a broadcast service is being provided, bootstrap signal ATSC 3.0 includes the minimal essential information that does not change at least for two consecutive physical layer frames. Then, received can be further assumed to binary modulated according each bit, so as achieve performance well reduced complexity. The simulation results show proposed obtain...
This article analyzes the capacities of various layered-division multiplexing (LDM)-based multiple physical layer pipe (M-PLP) configurations in Advanced Television Systems Committee (ATSC) 3.0. Further, this proposes an extended multi-layer LDM that consists a core and one or more enhanced layer(s) combined with different injection levels. The proposed can be time-division (TDM) and/or frequency division (FDM) to multiplex than two PLPs. provides structures transmitter receiver for M-PLP...
This paper presents feasibility verification of the Advanced Television Systems Committee (ATSC) 3.0 MIMO system for 8K-UHD terrestrial broadcasting services. For a reliable performance evaluation, computer simulation, laboratory test, and field trial are conducted, tests’ results compared with same metrics. Several physical layer configurations various data rates from 63 Mbps to 113 verified. The confirm that ATSC can support up within 6 MHz bandwidth.
This paper presents a complete, autonomous, wireless temperature sensor, fully encapsulated in 10.6mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> volume. The sensor includes solar energy harvesting with an integrated 2 μAh battery, optical receiver for programming, microcontroller and memory, 8GHz UWB transmitter, miniaturized custom antennas range of 7 meters. Full, stand-alone operation was demonstrated the first time system this...
A significant part of broad band sunlight remains unabsorbed in a simple structured amorphous silicon solar cell. This absorption can be enhanced by adopting light-trapping scheme with the help textured front surface and back reflector. For this purpose, honeycomb-type texture was fabricated on glass chemical etching. 3 μm×3 μm honeycomb patterned optical-mask used to create an image-pattern etch-mask surfaces. We 0.5% hydrofluoric acid (HF) as etchant solution optimized etching time ranging...
This paper derives a maximum-likelihood decision rule to detect the signaling information conveyed by bootstrap for an ATSC 3.0 system and proposes iterative detection scheme improve performance. The proposed iteratively averages channel estimates two consecutive symbols exploiting previously detected symbol. simulation results show that can obtain signal-to-noise ratio gain of approximately 2.0 dB at frame error rate 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A modified genetic algorithm, which we call the algorithm coupled with sensitivity analysis (GACS), is proposed in comparison (GA) and optimization process using design (DSA). The GACS reduces computing time by appending DSA to algorithm. As an example, a waveguide T-junction designed for purpose of minimizing reflected power. tool two dimensional vector finite element method (VFEM), does not generate spurious solutions having fatal effect on process, used. power shows characteristic less...
This paper presents performance comparison between layered division multiplexing (LDM) and time (TDM) based mobile services in the Advanced Television System Committee (ATSC) 3.0 standard. The has been performed through extensive computer simulations, leveraging full-chain simulator entirely compliant with A/322. simulation results demonstrate that LDM can significantly lower signal-to-noise ratio (SNR) requirement compared to TDM a given scenario while maintaining same (or analogous...
This paper analyzes capacities for various layered division multiplexing (LDM)-based multiple-physical layer pipe (M-PLP) configurations in Advanced Television Systems Committee 3.0. Also, this proposes transmitter and receiver structures multi-layer LDM. The proposed LDM consists of one core or more enhanced layer(s) that can be combined with different power levels. simulation results show an appropriate injection level improve the capacity M-PLP compared to TDM-based PLP configurations.
Abstract In this letter, an optimal calibration factor for mutual information effective signal‐to‐interference‐plus‐noise ratio (SINR) mapping (MIESM) scheme in fifth‐generation new radio (5G NR) is provided. By applying the to MIESM scheme, estimation accuracy of SINR can be improved. The minimizes mean squared error (MSE) difference between estimated and required SNR under additive white Gaussian noise (AWGN) at a block rate (BLER) 10%. Simulation results show that optimized outperforms...
This paper proposes a deep neural network (DNN)-based calibration factor estimation for an effective signal-to-interference-plus-noise ratio (SINR) mapping in channel quality indicator (CQI) selection of fifth-generation new radio (5G NR). In 5G NR, receiver can report CQI to transmitter, and adaptive modulation coding (AMC) is performed the transmitter. The be selected using SINR (ESM) scheme receiver. ESM compress received SINRs into SINR. Further, required improve accuracy ESM. optimal...
This paper presents an impact of cross-polarization discrimination (XPD) for the ATSC 3.0 MIMO system. Laboratory tests are carried out to analyze system performance with different XPD environments. The laboratory test results show that can provide reliable above 10 dB.
Shape optimization of high voltage direct current (HVDC) joint using shape design sensitivity analysis considering nonlinear conductivity is presented in this paper. The electric field distribution HVDC devices a resistive field. Also, the expressed terms temperature and distribution. In paper, formula derived, conductor geometry for relaxing concentration
This paper presents a new lattice representation for ATSC 3.0 MIMO which transforms 2×2 complex channel model into 4×4 real-valued linear system. It provides better understanding of the precoding and allows design simple decoding algorithms. Based on representation, maximum-likelihood (ML) algorithm is derived. Also, sub-optimal based successive interference cancellation proposed. The simulation results show that ML achieves similar performance to conventional decoder. Furthermore, can...
The shapes of waveguide structures are optimized for the uniform electromagnetic field illumination. vector finite element method is used as an analysis method. As design algorithm, we employ shape optimization with a sensitivity analysis. Performance measure function representing uniformity defined in this paper and calculation sensitivity. procedure applied to H-plane rectangular cavity structure feeder E-plane two plates waveguide.
In this paper, a non-uniform finite-difference time-domain (FDTD) method is incorporated with design-sensitivity optimization technique to design harmonic rejection microstrip low-pass filter (LPF) defected ground. The proposed LPF features ground plane obtain high impedance on the line and perform broad rejection. process initializes application of developed FDTD solver study geometric parameters for analysis. modifies parameter values structure analyzed again until performance meets...