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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea Institute of Information and Communication Engineering
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Journal DOI :
The Korean Institute of Information and Commucation Engineering
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Volume & Issues
Volume 15, Issue 12 - Dec 2011
Volume 15, Issue 11 - Nov 2011
Volume 15, Issue 10 - Oct 2011
Volume 15, Issue 9 - Sep 2011
Volume 15, Issue 8 - Aug 2011
Volume 15, Issue 7 - Jul 2011
Volume 15, Issue 6 - Jun 2011
Volume 15, Issue 5 - May 2011
Volume 15, Issue 4 - Apr 2011
Volume 15, Issue 3 - Mar 2011
Volume 15, Issue 2 - Feb 2011
Volume 15, Issue 1 - Jan 2011
Selecting the target year
A Study of HDD Performance Improvement through Filter Driver & NAND FLASH Memory
Kim, Jae-Kyung ; Kim, Woo-Gil ; Kim, Young-Kil ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1635~1641
DOI : 10.6109/jkiice.2011.15.8.1635
In this paper, we research the method for HDD I/O Performance improvement by Filter Driver & NAND FLASH Memory. This paper was started from NAND Flash Memory can not be replaced by HDD because of high cost. So We consider that using NAND Flash Memory as cache for HDD. It can be achieved high HDD Performance through Filter Driver by low cost.
Performance Evaluation for 2.45GHz Antenna used for Container security Device(Con Tracer)
Lee, Eun-Kyu ; Shon, Jung-Rock ; Choi, Sung-Pill ; Moon, Young-Sik ; Kim, Jae-Joong ; Choi, Hyung-Rim ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1642~1646
DOI : 10.6109/jkiice.2011.15.8.1642
In this paper, A Design of 2.45GHz and GPS antenna Integrated Board using Container security Device(ConTracer) for container cargo transportation is proposed and experimentally evaluate. Integrated antenna board include 2.4GHz chip and Ceramic GPS antenna is also consider the impact of RF interference based on simulation for applied to steel container. After a careful comparison and analysis a part of the container door for its best performance, We conduct tests to characterize. The proposed integrated antenna board is suitable for container cargo transportation application in steel container field.
Shielding effectiveness of an Aperture in Infinite Conducting plane Due to HEMP Incidence
Lim, Byoung-Jin ; Seo, Hun-Wook ; Lim, Sung-Min ; Kim, Ki-Chai ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1647~1652
DOI : 10.6109/jkiice.2011.15.8.1647
This paper presents the shielding effectiveness for the IEC 61000-2-9 standard when HEMP source penetrates through an aperture in a planar conducting plane of infinite extent. An integral equation is derived and solved by applying Galerkin's method of moments for calculating the electric shielding effectiveness. The electric shielding effectiveness is examined based on changing the aperture length and width. It is shown that the electric shielding effectiveness is suddenly decreases as the aperture width of 0.4 ~ 0.45
. It is also found that the penetrated electric field for the IEC 61000-2-9 incident field is different from the Bell Laboratory incident field, but the frequency characteristic of the electric shielding effectiveness becomes the same shape.
Miniaturized Microstrip Dual Band-Stop Filter Using Stepped Impedance Resonators
Kim, Gi-Rae ; Park, Young-Bae ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1653~1658
DOI : 10.6109/jkiice.2011.15.8.1653
A novel circuit structure of dual-band bandstop filters is proposed in this paper. This structure comprises two shunt-connected tri-section stepped impedance resonators with a transmission line in between. Theoretical analysis from the equivalent circuit and design procedures are described. We represented graphs for filter design from the derived synthesis equations by resonance condition of circuits. Notably, advantages of the proposed filter structure are compact size in design, wide range of realizable resonance frequency ratio, and more realizable impedances.
Initialization of Fuzzy C-Means Using Kernel Density Estimation
Heo, Gyeong-Yong ; Kim, Kwang-Baek ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1659~1664
DOI : 10.6109/jkiice.2011.15.8.1659
Fuzzy C-Means (FCM) is one of the most widely used clustering algorithms and has been used in many applications successfully. However, FCM has some shortcomings and initial prototype selection is one of them. As FCM is only guaranteed to converge on a local optimum, different initial prototype results in different clustering. Therefore, much care should be given to the selection of initial prototype. In this paper, a new initialization method for FCM using kernel density estimation (KDE) is proposed to resolve the initialization problem. KDE can be used to estimate non-parametric data distribution and is useful in estimating local density. After KDE, in the proposed method, one initial point is placed at the most dense region and the density of that region is reduced. By iterating the process, initial prototype can be obtained. The initial prototype such obtained showed better result than the randomly selected one commonly used in FCM, which was demonstrated by experimental results.
A Generalized Subspace Approach for Enhancing Speech Corrupted by Colored Noise Using Whitening Transformation
Lee, Jeong-Wook ; Son, Kyung-Sik ; Park, Jang-Sik ; Kim, Hyun-Tae ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1665~1674
DOI : 10.6109/jkiice.2011.15.8.1665
In this paper, we proposed an algorithm for speech enhancement of speeches corrupted by colored noise. When there is no correlation between colored noise and speech signal, the colored noise turns into white noise through whitening transformation. This transformed signal has been applied to the generalized subspace approach for speech enhancement. The speech spectral distortion, produced by the whitening transformation as pre-processing, has been restored by using the inverse whitening transformation as post-processing of the proposed algorithm. The performance of the proposed algorithm for speech enhancement has been confirmed by computer simulation. The colored noises used in this experiment were car noise and multi-talker babble. It is confirmed that the proposed algorithm shows better performance from SNR and SSD viewpoint over the previous approach with the data from the AURORA and TIMIT data base.
A Spectrally Efficient Relaying Scheme with Multiple Antennas for Next-Generation Cellular Networks
Jung, Bang-Chul ; Kang, Min-Seok ; Lee, Sang-Wook ; Jeon, Seong-Geun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1675~1686
DOI : 10.6109/jkiice.2011.15.8.1675
We propose a spectrally efficient relaying scheme with multiple antennas for cellular networks which consist of base station (BS), relay station (RSs), and mobile stations (MSs). In general, a BS has more antennas than an RS or an MS. By using multiple antennas, a BS can support another MS with the same frequency resource, where an RS transmits data to a specific MS. In this case, the MS receiving data form an RS also receives the interference form the BS because the BS also uses the same frequency resource at the same time. In this paper, we propose ing and pre-whitening techniques as a pre-coding scheme at the BS for reducing the interference at the MS receiving data from the RS.
Implementation of Digital IF design for a OFDM based WLAN
Park, Chan-Hoon ; Shin, Dong-Woo ; Choi, Youn-Kyoung ; Yang, Hoon-Gee ; Yang, Sung-Hyun ; Park, Jong-Chul ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1687~1694
DOI : 10.6109/jkiice.2011.15.8.1687
In this paper, we propose the design procedure of a digital IF system for the OFDM based WLAN system and examine its performances. Along with the decision procedure of ADC sample rate, NCO frequency and the required decimation ratio, we show the decimation ratio is accomplished through the use of a CIC filter and a MHBF. We also show that the amplitude distortion occurred in the decimation filters can effectively be compensated by a ISOP filter and an additional FIR filter, which leads to the reduction of the overall hardware complexity. Finally, we examine the BER performance of the proposed system and compare it with a theoretical one that excludes filter non-linearities.
Design and Implementation of a Diagnostic System for MOST Network using Wireless LAN
Jang, Si-Woong ; Kim, Kyeoung-Jin ; Jeon, Young-Joon ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1695~1703
DOI : 10.6109/jkiice.2011.15.8.1695
According to increase of the number of electronic devices for user comfort and safety, electronic systems are being constructed by using network to effectively control the devices. In this paper, we design and implement the MOST network diagnostic system by using wireless LAN to diagnose MOST network and the devices connected by the network and to effectively manage them. MOST, which is a vehicle multimedia network standard for the next generation, is being used for construction of car infotainment systems, and enables to develop various devices which are required for them. The wireless diagnostic system implemented in this paper enables to self-diagnose MOST network and also to check errors by diagnosing status of MOST electronic devices. We also can check and manage status of a in-vehicle MOST network system using mobile devices based on wireless LAN.
Image Synthesis and Multiview Image Generation using Control of Layer-based Depth Image
Seo, Young-Ho ; Yang, Jung-Mo ; Kim, Dong-Wook ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1704~1713
DOI : 10.6109/jkiice.2011.15.8.1704
This paper proposes a method to generate multiview images which use a synthesized image consisting of layered objects. The camera system which consists of a depth camera and a RGB camera is used in capturing objects and extracts 3-dimensional information. Considering the position and distance of the synthesizing image, the objects are synthesized into a layered image. The synthesized image is spaned to multiview images by using multiview generation tools. In this paper, we synthesized two images which consist of objects and human and the multiview images which have 37 view points were generated by using the synthesized images.
Upsampling and Downsampling using DCT Coefficients
Park, Il-Chul ; Kwon, Goo-Rak ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1714~1719
DOI : 10.6109/jkiice.2011.15.8.1714
High quality image processing schemes are used more widely than ever according to the development of various visual media. We need a compressed form of image for sending more capacity and a controlling strategy of images for small display devices. In this paper, we propose an image upsampling and downsamplig scheme using DCT coefficients for those purposes. Our scheme is designed to control the size of picture based on the target display media by reducing the data in DCT domain while not increasing the computational burdens. With the power of controlling the resolution in DCT domain, the proposed method shows higher PSNR than other competing methods in experiment.
A New Defense against DDoS Attacks using Reputation
Shin, Jung-Hwa ; Shin, Weon ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1720~1726
DOI : 10.6109/jkiice.2011.15.8.1720
The DDoS attacks which are increasing recently must have many zombie PCs before attacking targeted systems by attacker. A zombie PC is infected by attacker's malignant code and may be operated by the his/her special malicious purposes. But most users generally don't know that their PCs are infected and used as zombies by illegal activities covertly. In this paper, we propose a new scheme that decreases vulnerable PCs and isolates them from Internet before being zombie PCs. The proposed scheme point the reputations of connected PCs and decide whether their Internet connections are keeping continuously or not. Also We show the figures how to infect susceptable PCs to zombie PCs, and analyze the decrease effects of DDoS attacks adapted by the proposed scheme with various experiments.
A Jet Strobe Signal Timing Control of Ink Jet Printer Head for Enhancement of Printing Speed and Quality
Cho, Young-Wan ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1727~1734
DOI : 10.6109/jkiice.2011.15.8.1727
In this paper, a position control scheme of the ink droplet is presented for the high image quality and print speed ink jet printer. The proposed scheme estimates the impact position and compensates it by control of the jet strobe time based on the dynamic equations describing the moving trajectory of the ejected ink droplet. Compared to the conventional jet strobe control which is based on the simple synchronization with the position signal of the ink jet nozzle, the proposed control scheme provides more accurate impact position control while the carrier is moving with accelerated or decelerated speed as well as steady state speed with fluctuations. The availability of printing during the acceleration and deceleration states of the carrier moving enables the print speed up and the frame size down which means the cost down.
USB Device Authentication Protocol based on OTP
Jeong, Yoon-Su ; Kim, Yong-Tae ; Park, Gil-Cheol ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1735~1742
DOI : 10.6109/jkiice.2011.15.8.1735
Now a days, as a mass-storage USB becomes comfortable to carry, function of USB is being developed fast. However, there is a problem that the personal information which is stored in USB could be exposed being used with negative purpose without other certification process. This paper suggests OTP(One-Time Password)-based certification protocol of USB to securely protect personal information stored in USB without additional certification information. The proposed OTP based certification protocol of USB not only demands low calculations but also prevents physical approach of USB of other network and does not allow unnecessary service access of user because it conducts simple action and uses one-way hash function. Therefore, communication overhead and service delay is improved. In the experiment, the proposed protocol compares and evaluates throughput of certification server according to the numbers of USB and delay time of packet certification with a device(USB driver) which simply save device and a device(USB Token) which can calculate by oneself. As a result, it is improved as the number of 12.5% in the certification delay time on average and is improved as the number of 10.8% in the throughput of certification server according to the numbers of USB.
The Efficient Buffer Management for a Multimedia File System
Hong, Chul-Eui ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1743~1749
DOI : 10.6109/jkiice.2011.15.8.1743
The multimedia data for video-on-demand(VOD) service has large, continuous and real time characteristics. The frequent disk I/O operations takes much time and decrease the system performance in multimedia services. Therefore the efficient buffer management is needed in order to reduce the disk accesses to multimedia data. This paper addresses how to increase the buffer hit ratio and the number of users in a multimedia service like VOD by increasing the utility of buffer. This paper also simulated various resource management algorithms and strategies and evaluated, compared and analyzed their performances.
Design and Implementation of the Notification System based on the Event-Profile Model
Ban, Chae-Hoon ; Kim, Dong-Hyun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1750~1755
DOI : 10.6109/jkiice.2011.15.8.1750
Recently, it is possible for users to acquire necessary data easily as the various schemes of the searching information are developed. Since these data rise continuously like stream data, it is required to extract the appropriate data for the user's needs from the mass data on the internet. In the traditional scheme, they are acquired by processing the user queries after the occurred data are stored at a database. However, it is inefficient to process the user queries over the large volume of continuous data by using the traditional scheme. In this paper, we propose the Event-Profile Model to define the data occurrence on the internet as the events and the user's requirements as the profiles. We also propose and implement the filtering scheme to process the events and the profiles efficiently. We evaluate the performance of the proposed scheme and our experiments show that the new scheme outperforms the other on various dataset.
A study on the straight cruise of fish robot according to biological mimic
Park, Jin-Hyun ; Lee, Tae-Hwan ; Choi, Young-Kiu ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1756~1763
DOI : 10.6109/jkiice.2011.15.8.1756
This paper was researched the straight cruise of fish robot according to biological mimic, and it was compared the proposed method which was considered up to 7th order components in fourier series of Liu's tail motion function with the approximate method which was used general sine function by simulation. If fish robot has a large number of links and if the length of tail link is long. The end rotary joint trajectory of tail motion function generally is different from sine function. Therefore The approximate method which expresses tail motion trajectories as fundamental component in fourier series has a problem. Through the computer simulation, the proposed method showed 10% excellent propulsion and velocity than the conventional method.
Doping Profile Dependent Subthreshold Swing for Double Gate MOSFET
Jung, Hak-Kee ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1764~1770
DOI : 10.6109/jkiice.2011.15.8.1764
In this paper, the subthreshold swings for doping distribution in the channel have been analyzed in double gate MOSFET(DGMOSFET). The DGMOSFET is extensively been studying since it can lessen the short channel effects(SCEs) as next -generation nano device. The degradation of subthreshold swing(SS) known as SCEs has greatly influenced on application of digital devices, and has been analyzed for structural parameter and variation of channel doping profile in DGMOSFET. The analytical model of Poisson equation has been derived from nonuniform doping distribution for DGMOSFET. To verify potential and subthreshold swing model based on this analytical Poisson's equation, the results have been compared with those of the numerical Poisson's equation, and subthreshold swing for DGMOSFET has been analyzed using these models.
Superconductor Preparation by use of YBa
Ox powder and BaPbO
Chu, Soon-Nam ; Park, Jung-Cheul ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1771~1776
DOI : 10.6109/jkiice.2011.15.8.1771
In this paper, as an attempt to improve the preparation conditions of
superconducting bulk samples, the properties of
superconductor depending on the particle size of YBCO powder and
as an additive have been investigated, and a study on the effects of additive to the density, grain alignment, and porosity of samples that affect the critical current of superconductor has been performed. In order to prepare superconductor,
powder synthesized by sol-gel method, showing a size distribution of 0.2~1
was used. The
added to promote grain growth and to decrease porosities and weak links between grain boundaries of
superconductors. In the samples prepared by sol-gel synthesized powder with 10, 20, and 30 wt% conductive
additives, the sample with 20 wt%
obtained the highest critical current of 4.74 A, showing 20 wt% higher critical current than that with solid state synthesized powder.
Data Transmission Specific Simulation of Transmission Line using HSTL
Kim, Soke-Hwan ; Hur, Chang-Wu ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1777~1781
DOI : 10.6109/jkiice.2011.15.8.1777
Tosin backplane system design of this study (Backplane) from the HSTL (High-Speed Transceiver Logic) characteristics of the transmit and receive data using the HSPICE simulations and the actual implementation on the FPGA Data transmission characteristics were described by comparing the simulation results. Simulation and measurement criteria for point to point data transmission characteristics of wire length possible to send and receive data about the speed limits were reviewed. Measured point to point connection to send and receive signals at terminal velocity, the factors that affect the electrical noise around the wire length and showed a very important role.
The enhancement of medical image using optimized adaptive contrast method
Shin, Choong-Ho ; Jung, Chai-Yeoung ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1782~1790
DOI : 10.6109/jkiice.2011.15.8.1782
The goal of image processing is to improve the perceptual aspect and visual appearance of images for human viewers. The objectives of image enhancement vary according to its specific application and an image enhancement techniques used for a specific objective may not be accepted in some other applications. In this paper we review some of conventional enhancement techniques, such as histogram shrink, equalization, and the conservative adaptive contrast enhancement filter. And also, The adaptive contrast enhancement filter has optimized the applied values of variables which is configured rightly the medical image field. In the postprocessing, we used the histogram equalization method. As a result, the inputs which used a medical images has enhanced the edges of a result images which has applied the proposed filter. And also, because of the postprocessing, the image outlines has been lightened.
Comparison of temperature dependance between short and long period fiber gratings
Choi, Bo-Hun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1791~1796
DOI : 10.6109/jkiice.2011.15.8.1791
An optical fiber short period grating of 0.7 nm as a 3 dB wavelength linewidth was fabricated using a Gaussian distributed KrF Eximer laser and a phase mask. This grating has temperature dependancy of 0.01 nm/
over the range of -10
and no difference between temperature directions. An optical fiber long period grating of 14.22 nm as a 3 dB linewidth was also fabricated using a amplitude mask and has dependancy of 0.01 nm/
over the same range.
Performance Analysis of MIMO-OFDM System over Nakagami Fading Channel
Kang, Kyung-Sik ; Kim, Won-Sub ; Park, Chun-Ho ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1797~1804
DOI : 10.6109/jkiice.2011.15.8.1797
In this paper, I analyzed array organization of MIMO channel antenna and effect of operation environment by evaluating average BER from linear Space-Time Block Code orthogonal design and suggests designing condition of MT antenna for improved BER and the fading index m. To analyze system performance, I used M-PSK and M-QAM modulation, and to use analysis equations I used integrated by Nakagami fading variable, non-integrated Nakagami fading variable. We can get the organization of channel array by using mathematical calculation on matrix. STBE BER performance will decrease as AOA spreading decrease and such loss can be compensated from extending antenna spacing, and changing array organization.
Complex Bandpass Sampling for SDR front-end
Wang, Hong-Mei ; Kim, Jae-Hyung ; Kim, Hyung-Jung ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1805~1812
DOI : 10.6109/jkiice.2011.15.8.1805
Bandpass sampling technique has an advantage that it uses lower sampling frequency than Nyquist criterion. But special care is required in choosing sampling frequency to avoid self-image overlapping in the first Nyquist region. Recently, the second-order BPS techniques which can suppress possible self-image by using an additional ADC and by employing digital signal processing have been proposed. This paper addresses a complex BPS based SDR front-end. Unlike general second-order BPS, it needs simple FIR filter to compensate delay in the second ADC. We show a method to find proper sampling frequencies to down convert RF signals selected by tunable RF filter operating in arbitrary frequency range.
A study on Location Positioning System using RF Radio and Vision
Kim, Tae-Soo ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1813~1819
DOI : 10.6109/jkiice.2011.15.8.1813
In this research, the location positioning system supposed is concerned with range recognition technology using phase and magnitude of radio wave and adding technology of image histogram by vision. By the proposed technology, we design the radio transmitter and receiver and realize the measurement system, and save the data in disk that is earned from 900Mhz RF signal, middle frequency 450Khz of analog signal. Range information is earned the data through digital signal processing of IF signal. For the estimation of range measured, we analyze the difference between real range and measurement range, and also suggest the method to improve the measurement error using average processing and amplitude properties.
An Energy-Efficient Hybrid Scheduling Technique for Real-time and Non-real-time Tasks in a Sensor Node
Tak, Sung-Woo ;
Journal of the Korea Institute of Information and Communication Engineering, volume 15, issue 8, 2011, Pages 1820~1831
DOI : 10.6109/jkiice.2011.15.8.1820
When both types of periodic and aperiodic tasks are required to run on a sensor node platform with limited energy resources, we propose an energy-efficient hybrid task scheduling technique that guarantees the deadlines of real-time tasks and provides non-real-time tasks with good average response time. The proposed hybrid task scheduling technique achieved better performance than existing EDF-based DVS scheduling techniques available in the literature, the FIFO-based TinyOS scheduling technique, and the task-clustering based non-preemptive real-time scheduling technique.