A5027009599- Wireless Communication Networks Research
- Advanced Wireless Communication Techniques
- Power Line Communications and Noise
- PAPR reduction in OFDM
- Radar Systems and Signal Processing
- Advanced Wireless Network Optimization
- Telecommunications and Broadcasting Technologies
- Advanced SAR Imaging Techniques
- Microwave Imaging and Scattering Analysis
- Advanced Optical Network Technologies
- Advanced Measurement and Detection Methods
- Ultrasonics and Acoustic Wave Propagation
- Multimedia Communication and Technology
- Energy Efficient Wireless Sensor Networks
- Internet of Things and Social Network Interactions
- Infrared Target Detection Methodologies
- Geophysical Methods and Applications
- IoT-based Smart Home Systems
- Image Processing Techniques and Applications
- Advanced Data Compression Techniques
- Antenna Design and Optimization
- Digital Filter Design and Implementation
- Optical Network Technologies
- Engineering Applied Research
- Optical Systems and Laser Technology
Chungnam National University
2007-2019
Electronics and Telecommunications Research Institute
2011
National University of Singapore
2003
University of Maryland, College Park
2003
University of Utah
1985-1988
A nonperturbational inverse scattering solution for the integral equation (SIE) is presented. The numerical discretization of SIE performed by moment method (MM) using sine basis functions. Previous algorithms alternating variable (AV) nonlinear iteration with algebraic reconstruction technique (ART) linearizations are shown to diverge high contrast/large size acoustic scatterers. This deficiency alleviated use Gauss-Newton (GN) conjugate gradient (CG) linearizations. Further efficiency...
In electronic warfare support systems, the analysis of PRI (Pulse Repetition Interval) modulation characteristics for a radar pulse signal has attracted much interest because problem identification ambiguity in dense environments. A new method recognizing type is proposed support. The recognizes types using classifiers based on property autocorrelation sequences each type. addition, estimates period with periodicity. Simulation results are presented to show performance method.
The objectives of this study were 1) to evaluate the effects vaccination against foot-and-mouth disease (FMD) on growth performance, nutrient digestibility, hematological parameters, and behavior in a ruminant animal 2) investigate possible strategy for reducing its adverse effect. A total 12 Korean native goats (Capra hircus coreanae; 19.8 ± 2.9 kg) used crossover design with 3 experimental periods treatments, randomized balanced counteracting carry-over effects. treatments control,...
There are some leakage radiations from human body depending on incoming signals to it. As there many noises in the frequency band spanning several MHz, communication (HBC), which is a technique transfer various information through as channel, requires limitation of frequencies and data rates support reliable network that can cope with interference adjacent users electrical devices. This paper proposes selective baseband transmission (FSBT) for HBC. FSBT no RF/IF components or overhearing...
This paper describes an analysis of repeater effects in a CDMA system. The use repeaters is very cost-effective when the service providers want to overcome coverage holes and enlarge area. But acts as new source interference neighboring cells. It may have influence on wireless networks could result lowering quality. Therefore this analyzes effect by positive negative aspect.
Due to the proliferation of technologies and services related with wireless sensor network, various network applications are being appeared on stage a lot testing studied. However, most systems or testbeds have objective for test evaluation protocols. For sensors evaluating signal processing algorithms, it is necessary develop testbed those purposes especially, monitoring high speed sensing data. This paper proposes implements controlling sensors, getting managing real-time data remote sites.
This experiment was conducted to investigate the effects of palm kernel expellers on growth performance, nutrient digestibility, and blood profiles weaned pigs. A total 88 pigs (6.94±0.76 kg body weight [BW]; 28 d old) were randomly allotted 2 dietary treatments (4 pigs/pen; 11 replicates/treatment) in a randomized complete block design (sex as block). The typical nursery diet based corn soybean meal (CON) CON added with 20% (PKE). Pigs fed for 6 wk using 3-phase feeding program declining...
Although historically the Born or Rytov linear approximations have received a great deal of attention, it is now more apparent that only full nonlinear formulation inverse scattering problem, such as those we developed, provide accuracy for quantitative clinical ultrasound imaging. Our solutions been developed to reconstruct images speed sound, density, and absorption using exact Helmholtz wave equation without perturbation approximations. We fast algorithms which are based upon Galerkin...
This paper presents a new economic and effective TPEG (transport protocol experts group) application for location based service (LBS) that can be provided in terrestrial-digital multimedia broadcasting (T-DMB) transmission system. We propose novel point-of-interest (POI) interoperable with protocol, introduce the POI data server/client DMB receiver decoder implemented by using proposed protocol. The stability effectiveness of is verified through experimental broadcasting, pilot commercial...
To increase the spectral efficiency of HFC network, standard digital video broadcasting for cable systems (DVB-C2) was completed in 2010 and products that support DVB-C2 is expected to be released within years. Before making receiver, performance them should investigated under various channel conditions first. Thus, we show proposed structure a pre-FEC receiver considering model including additive white Gaussian noise (AWGN), frequency offset, echo channels provide information about...
This paper studies an automatic gain control (AGC) algorithm used in mobile cellular systems. The AGC design includes the determination of precision quantizer and a circuit to keep input power constant minimize quantization noise generated from analog-to-digital conversion process. proposed illustrates method determine required set parameters system. validity is verified by computer simulation.
In this paper, a new cell-averaging constant false alarm rate (CA-CFAR) detector based on minimum selected cell in sub-reference windows (SRW) is proposed. It takes the cells sliding for rejecting some strong interferences or alleviating clutter-edge effect surrounding test cell, and then it uses general technique to detect target. Under Swerling II target fluctuating model, analytic expressions of P <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
This experiment was conducted to investigate the effects of palm kernel expellers on productive performance, nutrient digestibility, and changes in white blood cells (WBC) lactating sows. A total 14 sows (200±12 kg average body weight [BW]; 2.5 parity) were used moved from gestation room farrowing d 109 gestation. Sows randomly assigned 2 dietary treatments a completely randomized design. The diet based corn soybean meal (CON) CON added with 20% (PKE). fed for 28 days (weaning) after...
We propose a fine phase tuner and rounding processor for numerically controlled oscillator (NCO), yielding reduced error in generating digital sine waveform. By using the presented this paper, when ratio of desired wave frequency to clock is expressed as fraction, an accurate adjustment representing fractional value can be achieved with simple hardware. In addition, proposed reduces effects truncation on output spectrum. Logic simulation results NCO these techniques show that noise spectrum...
Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | 1479-6848 (online)
A two-stage gain-clamped erbium doped fiber amplifier (GC-EDFA) using a pump laser diode and 16 channel wavelength division multiplexing (WDM) with 0.8 nm spacing in C band of <TEX>$1,545{\sim}1,560nm$</TEX> is experimentally demonstrated for burst packet mode optical switching system.
In this paper, we propose a preamble pattern for upstream cable modem and develop the synchronization channel equalization schemes suitable proposed pattern. The consists of concatenation oversample constant amplitude zero autocorrelation code (CAZAC) sequences length 32. Not only provides relatively good frame detection performance due to auto correlation properties CAZAC sequence, can be easily employed in initial automatic frequency control repeated structure.
GPON Extender is required to extend transmission reach in GPON. In this paper, we propose simple activation techniques and a burst reset controller for the extender, discuss experimental results of with CWDM links.
Bolt degradation has become a major issue in the nuclear industry since 1980's. If small cracks stud bolts are not detected early enough, they grow rapidly and cause catastrophic disasters. Their detection, despite its importance, is known to be very difficult problem due complicated structures of bolts. This paper presents method detecting sizing crack root between two adjacent crests threads. The key idea from fact that mode-converted Rayleigh wave travels slowly down face turns...
This paper proposes an efficient AGC scheme before mobile synchronization only using the existing hard-ware engine for after synchronization.
The MPEG-D unified speech and audio coding (USAC) standardization process was initiated by MPEG to develop an codec that is able provide consistent quality for mixed music contents. current USAC reference model structure consists of frequency domain (FD) linear prediction (LPD) core modules controlled using a signal classifier tool. In this letter, we propose LPD single-mode adaptive widowing-based transform-coded excitation module. We tested our system official test items all...