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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Institute of Electronics and Information Engineers
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The Institute of Electronics Engineers of Korea
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Volume & Issues
Volume 53, Issue 9 - Sep 2016
Volume 53, Issue 8 - Aug 2016
Volume 53, Issue 7 - Jul 2016
Volume 53, Issue 6 - Jun 2016
Volume 53, Issue 5 - May 2016
Volume 53, Issue 4 - Apr 2016
Volume 53, Issue 3 - Mar 2016
Volume 53, Issue 2 - Feb 2016
Volume 53, Issue 1 - Jan 2016
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Nonlinear Effect on the BER and Spectrum Shape of OFDM, UFMC and FBMC for 5G Mobile Communication
Lee, Dong-Hyung ; An, Changyoung ; Kung, Kyung-Lok ; Kim, Byeongjae ; Ryu, Heung-Gyoon ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 3~14
DOI : 10.5573/ieie.2016.53.6.03
Recently, researches for new waveforms have been carried in order to satisfy KPI for 5G mobile communication system. UFMC and FBMC are well known as ways to reduce OOB power. In this paper, we analyze spectrum of OFDM, UFMC, and FBMC system under nonlinear HPA environment. And then we evaluate and analyze performance of these systems under the same environment. As simulation results, OOB power of OFDM, UFMC, and FBMC increases with HPA nonlinearity increasement. Especially, OOB power of FBMC is the largest increase due to HPA nonlinearity. Also, BER performance of these systems is degraded by increasement of HPA nonlinearity. Therefore, In this paper, we can confirm that a system with low-complexity and high-speed processing is advantageous, because BER performance and OOB power characteristic of these systems are degraded to similar level, when these systems are implemented in real world.
A Coherent Phase Sequence Detection Scheme for SLM-based OFDM Systems without Side Information
Ryu, Chang Su ; Joo, Jung Suk ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 15~20
DOI : 10.5573/ieie.2016.53.6.015
In this paper, we consider selective mapping (SLM) based OFDM systems without side information, where SLM is one of the promising peak-to-average power ratio (PAPR) reduction techniques due to its simplicity and no distortion in the transmitted signal. First, we construct a new phase sequence where a part of phase sequence is replaced by an orthogonal sequence. Based on the proposed phase sequence, we propose a new scheme for detecting coherently the index of the phase sequence used in transmitter without side information. Computer simulation shows that the proposed detection scheme performs well in SLM-based OFDM systems, and specifically outperforms the existing ones when channel variation is relatively small between sub-carriers used in phase sequence detection.
Cooperative Communication Scheme Based on channel Characteristic for Underwater Sensor Networks
Ji, Yong-Joo ; Choi, Hak-Hui ; Lee, Hye-Min ; Kim, Dong-Seong ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 21~28
DOI : 10.5573/ieie.2016.53.6.021
This paper presents a cooperative transmission scheme for underwater acoustic sensor networks to improve packet transmission rate and reduce energy consumption. Source node transmits duplicated information relayed by distributed antennas called a virtual antenna array. Destination node combines that information to reduce packet error rate. The suggested cooperative scheme enhances the reliability by providing high diversity gains through intermediate relay nodes to overcome the distinct characteristics of the underwater channel, such as high transmission loss, propagation delay, and ambient noises. It is suggested that the algorithm select destinations and potential relays from a set of neighboring nodes that utilize distance cost, the residual energy of each node and local measurement of the channel conditions into calculation. Simulation results show that the proposed scheme reduces average energy consumption, response time, and increases packet delivery ratio compared with the SPF(Shortest Path First) and non-cooperative scheme using OPNET Moduler.
Optimal Design of Contending-type MAC Scheme for Wireless Passive Sensor Networks
Choi, Cheon Won ; Seo, Heewon ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 29~36
DOI : 10.5573/ieie.2016.53.6.029
A wireless passive sensor network is a network which, by letting separate RF sources supply energy to sensor nodes, is able to live an eternal life without batteries. Against expectations about an eternal life, however, a wireless passive sensor network still has many problems; scarcity of energy, non-simultaneity of energy reception and data transmission and inefficiency in resource allocation. In this paper, we focus on a wireless passive sensor network providing a packet service which is tolerable to packet losses but requires timely delivery of packets. Perceiving the practical constraints, we then consider a contending-type MAC scheme, rooted in framed and slotted ALOHA, for supporting many sensor nodes to deliver packets to a sink node. Next, we investigate the network-wide throughput achieved by the MAC scheme when the packets transmitted by geographically scattered sensor nodes experience path losses hence capture phenomena. Especially, we derive an exact formula of network-wide throughput in a closed form when 2 sensor nodes reside in the network. By controlling design parameters, we finally optimize the contending-type MAC scheme as to attain the maximum network-wide throughput.
Impact of Substrate Size on the Radiation Characteristics of an H-plane 5-Elements Linear Aperture Coupled Microstrip Patch Array Antenna
Bak, Hye-Lin ; Kim, Jae-Hyun ; Kim, Boo-Gyoun ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 37~45
DOI : 10.5573/ieie.2016.53.6.037
The effect of substrate size on the radiation characteristics of an H-plane 5-elements linear array antenna with an aperture coupled microstrip patch antenna (ACMPA) as unit element is investigated. The distance between the patch center and the substrate edge on the E-plane (
) and that on the H-plane (
) at which the maximum broadside gain of an H-plane 5-elements linear array antenna occurs are the same to those of single ACMPA using a unit element. Besides,
at which the minimum broadside gain of an H-plane 5-elements linear array antenna occurs are almost the same to those of single ACMPA using a unit element. The edge effect on the radiation characteristics of an H-plane 5-elements linear array antenna is mainly determined by
. The optimum substrate size for the radiation characteristics of an H-plane linear array antenna could be obtained from that of single ACMPA using a unit element of an H-plane linear array antenna.
Interference Cancellation for QO-STBC with EVD
Kim, Dong Jin ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 46~52
DOI : 10.5573/ieie.2016.53.6.046
Quasi-Orthogonal STBC (QO-STBC) scheme is proposed conventionally achieving approximate full rate and full diversity in more than 3 transmit antenna and open-loop environmen.. But, conventional QO-STBC has disadvantage that performance degradation by interference terms of detection matrix and high decoding complexity. Recently, this interference cancellation scheme of low decoding complexity by multiplying specific rotation matrix is proposed. We propose more general interference cancellation scheme by using EVD(Eigenvalue Decompostion).
Robust Placement Method for IR Drop in Power Gating Design
Kwon, Seok Il ; Han, Tae Hee ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 55~66
DOI : 10.5573/ieie.2016.53.6.055
Power gating is one of effective techniques for reducing leakage current in semiconductor chip. However, power gating cell (PGC) which is used to switch the power source causes performance degradation and the associated reliability problem by increasing IR drop. However, the newly raised problem caused by different scaling properties between gates and metal wires demands additional considerations in power gating design. In this paper, we propose a robust cell placement based power gating design method for reducing the area for power gating cell and metal routing thus to meet IR drop requirement. Experimental results by applying the proposed techniques on the application processor for smartphone fabricated in 28nm CMOS process show that power gating cell area is reduced by 16.16% and maximum IR drop value is also decreased by 8.49% compared to existing power gating cell placement techniques.
Forecast System for Security Incidents
Lee, Dongkun ; Lim, Jong In ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 69~79
DOI : 10.5573/ieie.2016.53.6.069
If the security incidents are occurred then, the company concentrates on the quick reaction to security incidents, reports the reason of incidents, it`s problem, the result of measure to the top management team. There will be the case that actively finding problems and taking it`s actions with linking the internal problems whenever external security incidents are occurred or that having only interest of problems at the moment. It is important that lasting the preventing action to prevent security incidents than not concentrating on only the security incidents are occurred. To do this, the systematical and consistent method for this should be provided. In this paper, we will provide a security incident forecast system. The security incident forecast system updates the incident induction factor which helping to forecast the potential security incidents on the database inferred from the direct security incidents which are occurred inside the company as well as the indirect security incidents which are occurred outside the company and makes interact with the incident experience and the measure process systematically. The security incident forecast system is the efficient measure about the potential security incidents in taking precaution.
Performance Analysis of a Parallel Mesh Smoothing Algorithm using Graph Coloring and OpenMP
Shin, Myeonggyu ; Kim, Jibum ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 80~87
DOI : 10.5573/ieie.2016.53.6.080
We propose a parallel mesh smoothing algorithm using graph coloring and OpenMP library for shared memory many core computer architectures. The proposed algorithm partitions a mesh into independent sets and performs a parallel mesh smoothing using OpenMP library. We study the effect of using various graph coloring and color reordering algorithms on the efficiency of performing the proposed parallel mesh smoothing algorithm. We also investigate the influence of using various OpenMP loop scheduling methods on the parallel mesh smoothing efficiency.
Image Cache for FPGA-based Real-time Image Warping
Choi, Yong Joon ; Ryoo, Jung Rae ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 91~100
DOI : 10.5573/ieie.2016.53.6.091
In FPGA-based real-time image warping systems, image caches are utilized for fast readout of image pixel data and reduction of memory access rate. However, a cache algorithm for a general computer system is not suitable for real-time performance because of time delays from cache misses and on-line computation complexity. In this paper, a simple image cache algorithm is presented for a FPGA-based real-time image warping system. Considering that pixel data access sequence is determined from the 2D coordinate transformation and repeated identically at every image frame, a cache load sequence is off-line programmed to guarantee no cache miss condition, and reduced on-line computation results in a simple cache controller. An overall system structure using a FPGA is presented, and experimental results are provided to show accuracy and validity of the proposed cache algorithm.
Image Enhancement Algorithm using Dynamic Range Optimization
Song, Ki Sun ; Kim, Min Sub ; Kang, Moon Gi ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 101~109
DOI : 10.5573/ieie.2016.53.6.101
The images captured by digital still cameras or mobile phones are not always satisfactory because the devices have limited dynamic ranges compared with that of the real world. To cope with the problems, tone mapping function based methods and retinex theory based methods are studied. However, these methods generate a halo artifact or limited enhancement of global and local contrasts. The proposed method estimates illumination information used for image enhancement by optimizing a dynamic range of input image. The estimated illumination information has smoothness characteristic where the luminance is flat and does not have where the luminance changes to prevent the halo artifact. Additionally, the estimated illumination information and surrounding pixel values are considered when the tone mapping function is applied to overcome the limitations of the conventional tone mapping function approach. Experimental results show that the proposed algorithm outperforms the conventional methods on objective and subjective criteria.
Illuminant Chromaticity Estimation via Optimization of RGB Channel Standard Deviation
Subhashdas, Shibudas Kattakkalil ; Yoo, Ji-Hoon ; Ha, Yeong-Ho ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 110~121
DOI : 10.5573/ieie.2016.53.6.110
The primary aim of the color constancy algorithm is to estimate illuminant chromaticity. There are various statistical-based, learning-based and combinational-based color constancy algorithms already exist. However, the statistical-based algorithms can only perform well on images that satisfy certain assumptions, learning-based methods are complex methods that require proper preprocessing and training data, and combinational-based methods depend on either pre-determined or dynamically varying weights, which are difficult to determine and prone to error. Therefore, this paper presents a new optimization based illuminant estimation method which is free from complex preprocessing and can estimate the illuminant under different environmental conditions. A strong color cast always has an odd standard deviation value in one of the RGB channels. Based on this observation, a cost function called the degree of illuminant tinge(DIT) is proposed to determine the quality of illuminant color-calibrated images. This DIT is formulated in such a way that the image scene under standard illuminant (d65) has lower DIT value compared to the same scene under different illuminant. Here, a swarm intelligence based particle swarm optimizer(PSO) is used to find the optimum illuminant of the given image that minimizes the degree of illuminant tinge. The proposed method is evaluated using real-world datasets and the experimental results validate the effectiveness of the proposed method.
A Method for Improving Object Recognition Using Pattern Recognition Filtering
Park, JinLyul ; Lee, SeungGi ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 122~129
DOI : 10.5573/ieie.2016.53.6.122
There have been a lot of researches on object recognition in computer vision. The SURF(Speeded Up Robust Features) algorithm based on feature detection is faster and more accurate than others. However, this algorithm has a shortcoming of making an error due to feature point mismatching when extracting feature points. In order to increase a success rate of object recognition, we have created an object recognition system based on SURF and RANSAC(Random Sample Consensus) algorithm and proposed the pattern recognition filtering. We have also presented experiment results relating to enhanced the success rate of object recognition.
Transform Skip Mode Decision and Signaling Method for HEVC Screen Content Coding
Lee, Dahee ; Yang, Seungha ; Shim, HiukJae ; Jeon, Byeungwoo ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 130~136
DOI : 10.5573/ieie.2016.53.6.130
HEVC (High Efficiency Video Coding) extension considers screen content as one of its main candidate sources for encoding. Among the tools already included in HEVC version 1, the technique of using transform skip mode allows transform to be skipped and to perform quantization process only. It is known to improve video coding efficiency for screen contents which are characterized to have much high frequency energy. But encoding complexity increases since its encoder should decide whether transform should be used or not in each
transform block. Based on statistical correlation between IBC (Intra block copy) and transform skip modes both of which are known effective in screen contents, this paper proposes a combined method of the fast transform skip mode decision and a modified transform skip signaling which signals transform_skip_flag at CU level as a representative transform skip signal. By simulation, the proposed method is shown to reduce encoding time of
transform blocks by about 32%.
Vessel Tracking Algorithm using Multiple Local Smooth Paths
Jeon, Byunghwan ; Jang, Yeonggul ; Han, Dongjin ; Shim, Hackjoon ; Park, Hyungbok ; Chang, Hyuk-Jae ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 137~145
DOI : 10.5573/ieie.2016.53.6.137
A novel tracking method is proposed to find coronary artery using high-order curve model in coronary CTA(Computed Tomography Angiography). The proposed method quickly generates numerous artificial trajectories represented by high-order curves, and each trajectory has its own cost. The only high-ranked trajectories, located in the target structure, are selected depending on their costs, and then an optimal curve as the centerline will be found. After tracking, each optimal curve segment is connected, where optimal curve segments share the same point, to a single curve and it is a piecewise smooth curve. We demonstrated the high-order curve is a proper model for classification of coronary artery. The experimental results on public data set sho that the proposed method is comparable at both accuracy and running time to the state-of-the-art methods.
Estimating The Ratio of The CPA Distance to Velocity for Underwater Target using Bearing CPA
Kim, JungHoon ; Yoon, KyungSik ; Seo, IkSu ; Lee, KyunKyung ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 146~151
DOI : 10.5573/ieie.2016.53.6.146
In this paper, we present a method for estimating the ratio of CPA distance to velocity of underwater target using target bearing information in CPA situation. This ratio can be estimated by previous research which is Envelope CPA using proximity sensor but it has low performance if the target is close to receiver sensor or bigger interference caused by multi-path effects. Therefore we propose a Bearing CPA technique using a target bearing information as a way to overcome.
Analysis of Parameter Characteristic of Parallel Electrodes Conduction-cooled Film Capacitor for HF-LC Resonance
Won, Seo-Yeon ; Lee, Kyeong-Jin ; Kim, Hie-Sik ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 155~166
DOI : 10.5573/ieie.2016.53.6.155
It is important to configure capacitance(C) of the capacitor and the induction coefficient(L) of the work coil on the resonant circuit design stage in order to induce heating on the object by a precise and constant frequency components in the electromagnetic induction heating equipment. Work coil conducts a direct induction heating according to heating point and area of the object which has a fixed heat factor so that work coil is designed to has fixed value. On the other hands, Capacitor should be designed to be changed in order to be the higher the utilization of the entire equipment. It is extracted the samples by variation of single electrode capacity from the selection stage of raw materials for capacity to the stage of process design for output of the high frequency LC resonance of 700kHz on 1000 VAC maximum voltage and current to
. It is suggested fundamental experiment results in order to prove relation for the optimal design of HF-LC resonance conduction-cooled capacitor based on the response of frequency characteristics and results of output parameters according to variation of the capacitance size.
Estimation of Ultrasonic Attenuation Coefficients in the Frequency Domain using Compressed Sensing
Shim, Jaeyoon ; Kim, Hyungsuk ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 167~173
DOI : 10.5573/ieie.2016.53.6.167
Compressed Sensing(CS) is the theory that can recover signals which are sampled below the Nyquist sampling rate to original analog signals. In this paper, we propose the estimation algorithm of ultrasonic attenuation coefficients in the frequency domain using CS. While most estimation algorithms transform the time-domain signals into the frequency-domain using the Fourier transform, the proposed method directly utilize the spectral information in the recovery process by the basis matrix without the completely recovered signals in the time domain. We apply three transform bases for sparsifying and estimate the attenuation coefficients using the Centroid Downshift method with Dual-reference diffraction compensation technique. The estimation accuracy and execution time are compared for each basis matrix. Computer simulation results show that the DCT basis matrix exhibits less than 0.35% estimation error for the compressive ratio of 50% and about 6% average error for the compressive ratio of 70%. The proposed method which directly extracts frequency information from the CS signals can be extended to estimating for other ultrasonic parameters in the Quantitative Ultrasound (QUS) Analysis.
Unscented Transformation According to Scaling Parameter for Motor Drive without Position Sensor
Moon, Cheol ; Kwon, Young-Ahn ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 6, 2016, Pages 174~180
DOI : 10.5573/ieie.2016.53.6.174
This paper study about an unscented Kalman filter with a variety type of unscented transformation to estimate state values for speed control without position sensor of a permanent-magnet synchronous motor. The principles of an unscented transformation and unscented Kalman filter are examined and their application is explained. Generally the mapping process can be divided into two type, such as a basic and a general form according to a scaling parameter. And computation time, the number of samples, and weights about samples are different from each other. But, there is no little information on the scaling parameter value how this value influences the system performance. Simulation and experimental results show the validity of the designed unscented transformation performance with the various scaling parameter values for sensorless motor drive.