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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 52, Issue 12 - Dec 2015
Volume 52, Issue 11 - Nov 2015
Volume 52, Issue 10 - Oct 2015
Volume 52, Issue 9 - Sep 2015
Volume 52, Issue 8 - Aug 2015
Volume 52, Issue 7 - Jul 2015
Volume 52, Issue 6 - Jun 2015
Volume 52, Issue 5 - May 2015
Volume 52, Issue 4 - Apr 2015
Volume 52, Issue 3 - Mar 2015
Volume 52, Issue 2 - Feb 2015
Volume 52, Issue 1 - Jan 2015
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Adaptive Blind Equalization Controlled by Linearly Combining CME and Non-CME Errors
Oh, Kil Nam ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 3~8
DOI : 10.5573/ieie.2015.52.4.003
In this paper, we propose a blind equalization algorithm based on the error signal linearly combined a constellation-matched error (CME) and a non-constellation-matched error (non-CME). The new error signal was designed to include the non-CME term for reaching initial convergence and the CME term for improving intersymbol interference (ISI) performance of output signals, and it controls the error terms through a combining factor. By controlling the error terms, it generates an appropriate error signal for equalization process and improves convergence speed and ISI cancellation performance compared to those of conventional algorithms. In the simulation for 64-QAM and 256-QAM signals under the multipath channel and additive noise conditions, the proposed method was superior to CMA and CMA+DD concurrent equalization.
An Efficient Directional MAC Protocol for Vehicular Ad-hoc Networks
Ji, Soonbae ; Kim, Junghyun ; You, Cheolwoo ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 9~16
DOI : 10.5573/ieie.2015.52.4.009
Quick and safe message transmission is an important research topic of vehicular ad hoc networks (VANET). Most studies assume that the periodic broadcast of beacon-frames between vehicles increases the safety of the driver. In this paper, we propose a medium access control (MAC) protocol and location-based clustering for the VANET to support reliable data transfer. In our proposal, the cluster heade (CH) manage the access and allocate the resources of the node. Our proposal uses simulation to confirm the reduction of the transmission delay and the collision rate of the signal.
Cooperative Communications Based on Virtual MIMO Transmission for Vehicles
Kim, Ilhwan ; Kim, Junghyun ; Ji, Soonbae ; You, Cheolwoo ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 17~22
DOI : 10.5573/ieie.2015.52.4.017
In this paper, we propose a cooperative vehicle communication scheme for high transmission efficiency and coverage extension under multipath fading environment of moving vehicle networks. The proposed scheme uses a Network coding scheme for improvement of receiving performance by using virtual Multiple-Input Multiple-Output(MIMO) transmit diversity. Simulation results have shown that the proposed scheme also provides alleviated Inter Symbol Interference(ISI) and Inter Channel Interference(ICI) as well as Signal-to-Noise Ratio(SNR) improvement and improve 3dB compared to the conventional scheme, since it can utilize the good properties of spatial diversity and coding gain by using virtual MIMO configuration. In this paper, we propose simulations of Ultra-Wideband(UWB) communication system to show validity by using the MATLAB.
Ranging Algorithm of Underwater Acoustic Wave with Look-up Table
Cheon, Ju-Hyun ; Moon, Seung-Hyun ; Lee, Ho-Kyoung ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 23~29
DOI : 10.5573/ieie.2015.52.4.023
In this paper, we introduce a underwater ranging algorithm with Look-up Table (LUT) by modifying the existing method which is using the changes of angles of accoustic rays with SSP (Sound Speed Profile). We compare the horizontal distance errors and the calculation times. Our new algorithm exploits Time of Arriva l(ToA) - horizontal distance table based on SSP. This algorithm offers faster calculation speed than the previous one with the slight increase of the distance estimation error.
Formulation of Calculation Method for Inducing Current by Aerial Power Distribution Line
Lee, Sangmu ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 30~36
DOI : 10.5573/ieie.2015.52.4.030
The formulation of calculation method for electromagnetic inducing current by aerial power distribution line is established. Nearby telecommunication cables can be induced due to the leakage of neutral current because the neutral line of power distribution is grounded at every 50 m distance. By the existing calculation method, the neutral line is regarded as a shielding conductor and the neutral current roles as an inducing current. So the error range to real measurement value is largely extended because the changing effect of leakage current flowing in the ground is not reflected. The leakage current returns to the power substation through the ground and is cumulated as being closer to the substation. When this practical inducing mechanism is applied, the deviation rate of calculation can be drastically reduced within about 100 % range compared to 1000 % of the exsiting method.
A 2-Step Global Optimization Algorithm for TDOA/FDOA of Communication Signals
Kim, Dong-Gyu ; Park, Jin-Oh ; Lee, Moon Seok ; Park, Young-Mi ; Kim, Hyoung-Nam ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 37~45
DOI : 10.5573/ieie.2015.52.4.037
In modern electronic warfare systems, a demand on the more accurate estimation method based on TDOA and FDOA has been increased. TDOA/FDOA localization consists of two-stage procedures: the extraction of information from signals and the estimation of emitter location. Various algorithms based on CAF(complex ambiguity function), which is known as a basic method, has been presented in the area of extractions. When we extract TDOA and FDOA information using a conventional method based on the CAF algorithm from communication signals, considerably long integration time is required for the accurate position estimation of an unknown emitter far from sensors more than 300 km. Such long integration time yields huge amount of transmission data from sensors to a central processing unit, resulting in heavy computiational complexity. Therefore, we theoretically analyze the integration time for TDOA/FDOA information using CRLB and propose a two-stage global optimization algorithm which can minimize the transmission time and a computational complexity. The proposed method is compared with the conventional CAF-based algorithms in terms of a computational complexity and the CRLB to verify the estimation performance.
New SPICE Modeling for Bias-Dependent Gate-Drain Overlap Capacitance in RF MOSFETs
Lee, Sangjun ; Lee, Seonghearn ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 49~55
DOI : 10.5573/ieie.2015.52.4.049
The inaccuracy of the bias-dependent gate-drain overlap capacitance
simulation in original BSIM4 and BSIM4 macro model using a diode is analyzed in detail. It is found that the accuracy of the macro model is better than of the BSIM4. However, the macro model cannot be used in the linear region. In order to remove the inaccuracy of the conventional models, a new BSIM4 macro model with a physical bias-dependent
equation is proposed and its accuracy is validated in the full bias range.
Extraction of Average Interface Trap Density using Capacitance-Voltage Characteristic at SiGe p-FinFET and Verification using Terman`s Method
Kim, Hyunsoo ; Seo, Youngsoo ; Shin, Hyungcheol ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 56~61
DOI : 10.5573/ieie.2015.52.4.056
Ideal and stretch-out C-V curve were shown at high frequency using SiGe p-FinFET simulation. Average interface trap density can be extracted by the difference of voltage axis on ideal and stretch-out C-V curve. Also, interface trap density(Dit) was extracted by Terman`s method that uses the same stretch-out of C-V curve with interface trap characteristic, and average interface trap density was calculated at same energy level. Comparing the average interface trap density, which was found by method using difference of voltage, with Terman`s method, it was verified that the two methods almost had the same average interface trap density.
A Fast Sensing Method using Concurrent Driving and Sequential Sensing for Large Capacitance Touch Screens
Mohamed, Mohamed G.A. ; Kim, HyungWon ; Cho, Tae-Won ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 62~70
DOI : 10.5573/ieie.2015.52.4.062
Recently the demand for projected capacitance touch screens is sharply growing especially for large screens for medical devices, PC monitors and TVs. Large touch screens in general need a controller of higher complexity. They usually have a larger number of driving and sensing lines, and hence it takes longer to scan one frame for touch detection leading to a low frame scan rate. In this paper, a novel touch screen control technique is presented, which scans each frame in two steps of simultaneous multi-channel driving. The first step is to drive all driving lines simultaneously and determine which sensing lines have any touch. The second step is to sequentially rescan only the touched sensing lines, and determine exact positions of the touches. This technique can substantially increase the frame scan rate. This technique has been implemented using an FPGA and an AFE board, and tested using a commercial 23-inch touch screen panel. Experimental results show that the proposed technique improves the frame scan rate by 8.4 times for the 23-inch touch screen panel over conventional methods.
Dual Sensing with Voltage Shifting Scheme for High Sensitivity Touch Screen Detection
Seo, Incheol ; Kim, HyungWon ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 71~79
DOI : 10.5573/ieie.2015.52.4.071
This paper proposes a new touch screen sensing method that improves the drawback of conventional single-line sensing methods for mutual capacitance touch screen panels (TSPs). It introduces a dual sensing and voltage shifting method, which reduces the ambient noise effectively and enhances the touch signal strength. The dual sensing scheme reduces the detection time by doubling the integration speed using both edges of excitation pulse signals. The voltage shifting method enhances the signal-to-noise ratio (SNR) by increasing the voltage range of integrations, and maximizing the ADC`s input dynamic range. Simulation and experimental results using a commercial 23" large touch screen show an SNR performance of 43dB and a scan rate 2 times faster than conventional schemes - key properties suited for a large touch screen panels. We implemented the proposed method into a TSP controller chip using Magnachip`s CMOS 0.18um process.
Linearization Effect of Weight Programming about Time in Memristor Bridge Synapse
Choi, Hyuncheol ; Park, Sedong ; Yang, Changju ; Kim, Hyongsuk ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 80~87
DOI : 10.5573/ieie.2015.52.4.080
Memristor is a new kind of memory device whose resistance varies depending upon applied charge and whose previous resistance state is preserved even when its power is off. Ordinary memristor has a nonlinear programming characteristics about time when a constant voltage is applied. For the easiness of programming, it is desirable that resistance is programmed linearly about time. We had proposed previously a memristor bridge configuration with which weight can be programmed nicely in positive, negative or zero. In memristor bridge circuit, two memristors are connected in series with different polarity. Memristors are complementary each other and it follows that the memristance variation is linear with respect to time. In this paper, the linearization effect of weight programming of memristor bridge synapse is investigated and verified about both
memristor from HP and a nonlinear memristor with a window function. Memristor bridge circuit would be helpful to conduct synaptic weight programming.
Accurate Equation Analysis for RF Negative Resistance circuit at High Frequency Operation Range
Yun, Eun-Seung ; Hong, Jong-Phil ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 88~95
DOI : 10.5573/ieie.2015.52.4.088
This paper presents a new analysis of RF negative resistance (RFNR) circuits, known as a negative resistance generator. For accurate equation analysis of RFNR, this study examined the effects of the gate resistance and the source parasitic capacitance of the transistor. In addition, the input admittance of the conventional equation was calculated by looking into the source-terminal of the transistor, whereas that of the proposed equation was calculated by examining the gate-terminal of the transistor. The proposed equation analysis is more accurate than that of the conventional analysis, especially for higher frequency range. This paper verify the accuracy of the proposed analysis at high frequency range using the simulation.
Steganography on Android Smart Devices
Jung, Ki-Hyun ; Lee, Joon-Ho ; Yoo, Kee-Young ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 99~105
DOI : 10.5573/ieie.2015.52.4.099
As increasing the use of smart phones, the interest of iOS and Android operating system is growing up. In this paper, a novel steganographic method based on Android platform is proposed. Firstly, we analyze the skia based image format that is supporting 2D graphic libraries in Android operating system. Then, we propose a new data hiding method based on the Android bitmap image format. The proposed method hides the secret data on the four true color areas which include Alpha, Red, Green, Blue. In especial, we increase the embedding capacity of the secret data on the Alpha area with a less image distortion. The experimental results show that the proposed method has a higher embedding capacity and less distortion by changing the size of the secret bits on the Alpha area.
Step-wised Out-test Mechanism for Underwater Acoustic Networks
Ibragimov, Mukhridinkhon ; Yun, Nam-Yeol ; Shin, Soo-Young ; Namgung, Jung-Il ; Kim, Changhwa ; Park, Soo-Hyun ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 106~114
DOI : 10.5573/ieie.2015.52.4.106
Despite a series of various developments in underwater acoustic sensor networks, there are still occasions of loss of connection over the network. Because sufficient amounts of drawbacks causing disconnections posed particularly in the middle of connection over the network emerge in the ocean environment, there is a need of new testing mechanism for underwater acoustic networks. In this paper, we proposed to investigate the most vital parts of the network deployment whether they function well in order, without any failure so as to identify where exactly communication process problems and failures are. We introduce step-wised out-test mechanism for UWASNS and accomplished the mechanism by implementing experiments and rigorously checked all the underwater devices utilizing out-test function. Experimental results and out-test function are evinced by implementing, in order to explain our system and conclude with possible future improvements.
Design of Serial Decimal Multiplier using Simultaneous Multiple-digit Operations
Yu, ChangHun ; Kim, JinHyuk ; Choi, SangBang ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 115~124
DOI : 10.5573/ieie.2015.52.4.115
In this paper, the method which improves the performance of a serial decimal multiplier, and the method which operates multiple-digit simultaneously are proposed. The proposed serial decimal multiplier reduces the delay by removing encoding module that generates 2X, 4X multiples, and by generating partial product using shift operation. Also, this multiplier reduces the number of operations using multiple-digit operation. In order to estimate the performance of the proposed multiplier, we synthesized the proposed multiplier with design compiler with SMIC 110nm CMOS library. Synthesis results show that the area of the proposed serial decimal multiplier is increased by 4%, but the delay is reduced by 5% compared to existing serial decimal multiplier. In addition, the trade off between area and latency with respect to the number of concurrent operations in the proposed multiple-digit multiplier is confirmed.
PCI Express Gen3 System Design using High-speed Signal Integrity Analysis
Kwon, Wonok ; Kim, Youngwoo ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 125~132
DOI : 10.5573/ieie.2015.52.4.125
PCI Express is high-speed point-to-point serial protocol, the system is designed by analysing loss and jitter through Eye Diagram. It is necessarily analyzing high speed serial signals when the PCI Express Gen3 which has 8Gbps physical signal speed is designed especially. This paper deals with topology extraction, channel analysis, extraction of s-parameters and system signal integrity simulation within transceiver buffer models through PCI Express Gen3 server connecting switch system design. Optimal parameters of transmitter buffer equalizer are found through solution space simulation of de-emphasis and preshoot parameters to compensate channel loss.
Fingerprint Pore Extraction Method using 1D Gaussian Model
Cui, Junjian ; Ra, Moonsoo ; Kim, Whoi-Yul ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 135~144
DOI : 10.5573/ieie.2015.52.4.135
Fingerprint pores have proven to be useful features for fingerprint recognition and several pore-based fingerprint recognition systems have been reported recently. In order to recognize fingerprints using pore information, it is very important to extract pores reliably and accurately. Existing pore extraction methods utilize 2D model fitting to detect pore centers. This paper proposes a pore extraction method using 1D Gaussian model which is much simpler than 2D model. During model fitting process, 1D model requires less computational cost than 2D model. The proposed method first calculates local ridge orientation; then, ridge mask is generated. Since pore center is brighter than its neighboring pixels, pore candidates are extracted using a
filter and a
filter successively. Pore centers are extracted by fitting 1D Gaussian model on the pore candidates. Extensive experiments show that the proposed pore extraction method can extract pores more effectively and accurately than other existing methods, and pore matching results show the proposed pore extraction method could be used in fingerprint recognition.
Effective Noise Reduction using STFT-based Content Analysis
Baek, Seungin ; Jeong, Soowoong ; Choi, Jong-Soo ; Lee, Sangkeun ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 145~155
DOI : 10.5573/ieie.2015.52.4.145
Noise reduction has been actively studied in the digital image processing and recently, block-based denoising algorithms are widely used. In particular, a low rank approximation employing WNNM(Weighted Nuclear Norm Minimization) and block-based approaches demonstrated the potential for effective noise reduction. However, the algorithm based on low rank a approximation generates the artifacts in the image restoration step. In this paper, we analyzes the image content using the STFT(Short Time Fourier Transform) and proposes an effective method of minimizing the artifacts generated from the conventional algorithm. To evaluate the performance of the proposed scheme, we use the test images containing a wide range of noise levels and compare the results with the state-of-art algorithms.
Active Water-Level and Distance Measurement Algorithm using Light Beam Pattern
Kim, Nac-Woo ; Son, Seung-Chul ; Lee, Mun-Seob ; Min, Gi-Hyeon ; Lee, Byung-Tak ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 156~163
DOI : 10.5573/ieie.2015.52.4.156
In this paper, we propose an active water level and distance measurement algorithm using a light beam pattern. On behalf of conventional water level gauge types of pressure, float-well, ultrasonic, radar, and others, recently, extensive research for video analysis based water level measurement methods is gradually increasing as an importance of accurate measurement, monitoring convenience, and much more has been emphasized. By turning a reference light beam pattern on bridge or embankment actively, we suggest a new approach that analyzes and processes the projected light beam pattern image obtained from camera device, measures automatically water level and distance between a camera and a bridge or a levee. As contrasted with conventional methods that passively have to analyze captured video information for recognition of a watermark attached on a bridge or specific marker, we actively use the reference light beam pattern suited to the installed bridge environment. So, our method offers a robust water level measurement. The reasons are as follows. At first, our algorithm is effective against unfavorable visual field, pollution or damage of watermark, and so on, and in the next, this is possible to monitor in real-time the portable-based local situation by day and night. Furthermore, our method is not need additional floodlight. Tests are simulated under indoor environment conditions from distance measurement over 0.4-1.4m and height measurement over 13.5-32.5cm.
Robust Stereo Matching under Radiometric Change based on Weighted Local Descriptor
Koo, Jamin ; Kim, Yong-Ho ; Lee, Sangkeun ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 164~174
DOI : 10.5573/ieie.2015.52.4.164
In a real scenario, radiometric change has frequently occurred in the stereo image acquisition process using multiple cameras with geometric characteristics or moving a single camera because it has different camera parameters and illumination change. Conventional stereo matching algorithms have a difficulty in finding correct corresponding points because it is assumed that corresponding pixels have similar color values. In this paper, we present a new method based on the local descriptor reflecting intensity, gradient and texture information. Furthermore, an adaptive weight for local descriptor based on the entropy is applied to estimate correct corresponding points under radiometric variation. The proposed method is tested on Middlebury datasets with radiometric changes, and compared with state-of-the-art algorithms. Experimental result shows that the proposed scheme outperforms other comparison algorithms around 5% less matching error on average.
Learning-based Super-resolution for Text Images
Heo, Bo-Young ; Song, Byung Cheol ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 175~183
DOI : 10.5573/ieie.2015.52.4.175
The proposed algorithm consists of two stages: the learning and synthesis stages. At the learning stage, we first collect various high-resolution (HR)-low-resolution (LR) text image pairs, and quantize the LR images, and extract HR-LR block pairs. Based on quantized LR blocks, the LR-HR block pairs are clustered into a pre-determined number of classes. For each class, an optimal 2D-FIR filter is computed, and it is stored into a dictionary with the corresponding LR block for indexing. At the synthesis stage, each quantized LR block in an input LR image is compared with every LR block in the dictionary, and the FIR filter of the best-matched LR block is selected. Finally, a HR block is synthesized with the chosen filter, and a final HR image is produced. Also, in order to cope with noisy environment, we generate multiple dictionaries according to noise level at the learning stage. So, the dictionary corresponding to the noise level of the input image is chosen, and a final HR image is produced using the selected dictionary. Experimental results show that the proposed algorithm outperforms the previous works for noisy images as well as noise-free images.
A Novel Ambiguity Resolution Method of Radar Pulses using Genetic Algorithm
Han, Jinwoo ; Jo, Jeil ; Kim, Sanhae ; Park, Jintae ; Song, Kyuha ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 184~193
DOI : 10.5573/ieie.2015.52.4.184
Passive Surveillance System based on the TDOA detects the emitter position in the air using TOA of pulses comprising emitter signal from multiple receivers. In case that PRI of pulses from the emitter is not enough big in comparison with the distance among receivers, it causes the ambiguity problem in selecting proper pulse pairs for TDOA emitter geolocation. In this paper, a novel ambiguity resolution method of radar pulses is presented by using genetic algorithm after changing ambiguity problem into optimization problem between TDOA of received pulses from each receiver and emitter position. Simulation results are presented to show the performance of the proposed method.
The Study Image Aquisition System for Radiation Source Using the Stereo Gamma-ray Detector
Hwang, Young-Gwan ; Lee, Nam-Ho ; Lee, Seung-Min ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 197~203
DOI : 10.5573/ieie.2015.52.4.197
Nuclear power plant has increased continuously for power production in all over the world and the interest about nuclear accident and the dismantling of aging nuclear power plant has been a growing. The leaked radioactive source that is generated by radiation accidents must detect and remove to minimized the damage as soon as possible. Gamma-ray detection system that have been developed until now cannot provide the precise position of radioactive sources because they detect and imaging the position of radiation sources in just two dimensions. In this paper, stereo gamma ray detection system has developed and the algorithm for calculation of the distance has implemented to be able to measure the distribution of the leakage gamma ray source for the system. Stereo camera calibration for distance detection was conducted with the correction pattern and LED light and we carried out performance test of the system for the LED light source and a gamma ray source. In both experiments the results of the performance test, it was confirmed to have a 5% error. The results of this paper is used as a material for the development of gamma-ray imaging device.
Noise Estimation using Edge Detection in Moving Pictures
Kim, Young-Ro ; Oh, Tae-Myung ;
Journal of the Institute of Electronics and Information Engineers, volume 52, issue 4, 2015, Pages 207~212
DOI : 10.5573/ieie.2015.52.4.207
We propose a noise estimation method using edge detection in moving pictures. Edge detection is to exclude structures and details which have an effect on the noise estimation. To detect edge, we use Sobel and morphological closing operators which are robust to details of images. The proposed noise estimation method is more efficiently applied to noise estimation in various types of moving images and has better results than those of existing noise estimation methods. Also, proposed algorithm can be efficiently applied to image and video applications.