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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 20, Issue 8 - Aug 2016
Volume 20, Issue 7 - Jul 2016
Volume 20, Issue 6 - Jun 2016
Volume 20, Issue 5 - May 2016
Volume 20, Issue 4 - Apr 2016
Volume 20, Issue 3 - Mar 2016
Volume 20, Issue 2 - Feb 2016
Volume 20, Issue 1 - Jan 2016
Selecting the target year
Dual-band Compact CPW-fed Slot Antenna for WLAN applications
Choi, In-Tae ; Shin, Ho-Sub ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 1~7
DOI : 10.6109/jkiice.2016.20.1.1
In this paper, the compact CPW-fed slot antenna for WLAN applications is proposed. While the proposed antenna with size of only
is consisted of double stub and folded slot, the antenna for 2.4 GHz band and 5 GHz band is designed and fabricated with optimized parameters obtained by simulation. Proposed antenna is fabricated with FR-4 substrate to the thickness of 1.0 mm. By obtaining the measured return loss level of < -10 dB at dual-band, we showed that it is operated as antenna for WLAN applications, and then it is also expected to be usable as antenna for RFID.
A Compact CPW-fed Antenna with Step Structure for 5 GHz Band WLAN Applications
Choi, In-Tae ; Shin, Ho-Sub ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 8~14
DOI : 10.6109/jkiice.2016.20.1.8
In this paper, a compact CPW-fed antenna for 5 GHz (5.15-5.35 GHz, 5.725-5.825 GHz) band WLAN applications is presented. The designed antenna's shape is step structure. The antenna is fabricated and measured into FR-4 substrate of dielectric comstant 4.2 and thickness 1.0 mm with optimized parameters obtained by simulation. We confirm that it is operated as antenna for WLAN applications by obtaining the measured return loss level of < -10 dB in 5.133-5.982 GHz. The dimensions of the antenna (
) shows an compactness of about 67.17% with respect to a conventional folded slot antenna.
Design of a compact quasi-Yagi antenna for portable RFID reader
Lee, Jong-Ig ; Yeo, Junho ; Baek, Woon-Seok ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 15~21
DOI : 10.6109/jkiice.2016.20.1.15
In this paper, we considered a design method of a compact quasi-Yagi antenna for portable UHF RFID readers. The antenna consists of a dipole driver and a reflector printed on a dielectric substrate, and it is fed by a microstrip line. In order to reduce the antenna size, the dipole and reflector are bent and the balun between the feeding microstrip line and coplanar strip (CPS) line is integrated within the CPS line. The effects of the geometrical parameters of the proposed antenna on the antenna performance are examined, and the parameters are adjusted to be suitable for the operation in UHF RFID band (902-928 MHz). The size of the fabricated antenna is
, and the experiment results reveal a frequency band of 892-942 MHz for a voltage standing wave ratio < 2, a gain > 3.5 dBi, and a front-to-back ratio > 6.6 dB over the frequency band for UHF RFID.
Active Sonar Target Detection Using Fractional Fourier Transform
Baek, Jongdae ; Seok, Jongwon ; Bae, Keunsung ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 22~29
DOI : 10.6109/jkiice.2016.20.1.22
Many studies in detection and classification of the targets in the underwater environments have been conducted for military purposes, as well as for non-military purpose. Due to the complicated characteristics of underwater acoustic signal reflecting multipath environments and spatio-temporal varying characteristics, active sonar target detection technique has been considered as a difficult technique. In this paper, we describe the basic concept of Fractional Fourier transform and optimal transform order. Then we analyze the relationship between time-frequency characteristics of an LFM signal and its spectrum using Fractional Fourier transform. Based on the analysis results, we present active sonar target detection method. To verify the performance of proposed methods, we compared the results with conventional FFT-based matched filter. The experimental results demonstrate the superiority of the proposed method compared to the conventional method in the aspect of AUC(Area Under the ROC Curve).
A Low-Complexity Sphere Decoding Algorithm for Generalized Spatial Modulation
Jeon, EunTak ; Yoon, SungMin ; Lee, JaeSeong ; Woo, DaeWi ; Lee, Kyungchun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 30~36
DOI : 10.6109/jkiice.2016.20.1.30
In this paper, an Rx-ordering aided sphere decoding algorithm for generalized spatial modulation (GSM) systems is proposed. In the proposed sphere decoding algorithm, to efficiently reduce the search region, the received signals are optimally ordered, which results in the reduction of computational complexity. To evaluate the performance and the computational complexity of the proposed Rx-ordered sphere decoding algorithm, the simulations are performed. In the simulation results, it is observed that in GSM systems, the proposed decoding algorithm achieves the same error performance with the conventional SD, whereas it efficiently decreases the computational complexity for symbol detection.
Distributed Cognitive Radio MAC Protocol Considering User Fairness and Channel Quality
Kwon, Young-Min ; Park, Hyung-Kun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 37~44
DOI : 10.6109/jkiice.2016.20.1.37
It is important that using of efficient radio resource because of deficiency spectrum problem, so that related to this problem many researches are have proceeded. To solve this problem, Cognitive Radio(CR) was suggested. The channels are allocated to the secondary users when the primary users don't use the channels, and unfairness of secondary users can be serious problem and channel quality of multichannel can be different due to the different traffic pattern of primary users. In this paper, we propose MAC prtocol both of the user's fairness and channel quality in CR networks. Simulation results show the comparison with CR MAC protocols.
A Robust Receiver for Generalized Spatial Modulation under Channel Information Errors
Lee, JaeSeong ; Woo, DaeWi ; Jeon, EunTak ; Yoon, SungMin ; Lee, Kyungchun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 45~51
DOI : 10.6109/jkiice.2016.20.1.45
In this paper, we develop an iterative maximum likelihood (ML) receiver for generalized spatial modulation systems. In the proposed ML receiver, to mitigate the deleterious effect of channel information errors on symbol detection, the instantaneous covariance matrix of effective noise is estimated, which is then used to obtain improved ML solutions. The estimated covariance matrix is updated through multiple iterations to enhance the estimation accuracy. The simulation results show that the proposed ML receiver outperforms the conventional ML detection scheme, which does not take the effect of channel information errors into account.
Hybrid Scheduling in Millimeter Wave Full-Duplex Systems
Mai, Vien V. ; Kim, Juyeop ; Choi, Sang Won ; Shin, Won-Yong ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 52~57
DOI : 10.6109/jkiice.2016.20.1.5
We introduce a hybrid scheduling in a multi-path poor scattering full-duplex (FD) system, which consists of one multi-antenna FD base station and a large number of single-antenna half-duplex mobile stations. Our hybrid scheduling utilizes partial channel state information at the transmitter. In particular, unlike the conventional scheduling method using opportunistic transmission for both uplink and downlink, the proposed scheme combines a random transmit beamforming for downlink and a zero forcing beamforming for uplink. As our main result, via computer simulations, it is shown that the proposed scheme has a superior sum-rate performance than that of the conventional scheduling method beyond a certain signal-to-noise ratio regime.
Robust k-means Clustering-based High-speed Barcode Decoding Method to Blur and Illumination Variation
Kim, Geun-Jun ; Cho, Hosang ; Kang, Bongsoon ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 58~64
DOI : 10.6109/jkiice.2016.20.1.58
In this paper presents Robust k-means clustering-based high-speed bar code decoding method to blur and lighting. for fast operation speed and robust decoding to blur, proposed method uses adaptive local threshold binarization methods that calculate threshold value by dividing blur region and a non-blurred region. Also, in order to prevent decoding fail from the noise, decoder based on k-means clustering algorithm is implemented using area data summed pixel width line of the same number of element. Results of simulation using samples taken at various worst case environment, the average success rate of proposed method is 98.47%. it showed the highest decoding success rate among the three comparison programs.
Moving Brand Identity in Cyber World
Whang, Chris Inkyong ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 65~71
DOI : 10.6109/jkiice.2016.20.1.65
The cyber world is organically alive. It continues to evolve as humans interact with it. Real life and virtual reality are directly or indirectly connected through technology at the network terminal. Branding, in the cyber world, is created by BI(Brand Identity), using designed symbols and logotype developed with digital technology. The objective of this study is to improve the brand value of enterprises and organizations through the use of moving images to adapt to the mobile environment in this rapidly changing cyber world. First, the basic concepts of brand identity, structure, and integrated brand identity were studied. Next, case studies of overseas enterprise branding such Swisscom, HP, BBC were analyzed examining their design concepts and implementation of integrated moving brands. Finally, moving brand identity is explored, for value enhancement, in my projects in ACM SIG CHI 2015, HCI Korea 2014, Aegis Ship 'Yulgok YiYi.' with a discussion of design planning and results. This treatise will contribute to the improvement of brand strategy and design in this country.
Forensic Analysis of KakaoTalk Messenger on Android Environment
Yoon, Jongcheol ; Park, Yongsuk ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 72~80
DOI : 10.6109/jkiice.2016.20.1.72
Recently, IM(Instant Messenger) of KakaoTalk is being used on smart devices such as smartphones. Because IM service can carry user and/or suspector's various information including life style, geographical position, psychology and crime history, forensic analysis on IM service is desirable. But, forensic analysis for KakaoTalk is not well studied yet. This paper studies a proper forensic method for KakaoTalks, finds artifacts location, reconstruct the list of contacts and the chronology of the messages that have been exchanged by users. Proposed methodology and analyzed information can provide a basic platform for forensic tool.
Multi-Channel Authentication based Security Card Design and Implementation
Seo, Hwa-jeong ; Kim, Ho-won ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 81~86
DOI : 10.6109/jkiice.2016.20.1.81
In this paper, we present multi-channel authentication based security card design. Since this security card is written on the transparent paper, security information is extracted by overlaying the card with smartphone screen. This method removes the limitations of physical layout in previous security card and improves the security level. Furthermore, our security card is secure when our card is exposed to malicious users.
Selective Management of System-level Access Permission in Android-based Application
Jeong, Jongmun ; Lee, Hoon ; Hwang, Mintae ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 87~93
DOI : 10.6109/jkiice.2016.20.1.87
In this paper, we propose a new method to enhance an android security by exploiting a selective management of application permission. To that purpose, we analyze behavior of the current android security, via which we draw out possible vulnerabilities. After that, we develop a tool to implement the selective management of the application permission, witch has a function to give a permission selectively for the application when we install a new application. Via experiment we show validity of the developed tool in solving the drawn vulnerability in the current android security.
A Countermeasure against the Abatement Attack to the Security Server
Cho, Seong-Min ; Lee, Hoon ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 94~102
DOI : 10.6109/jkiice.2016.20.1.94
In this work we propose a new method to countermeasure against the abatement attack to the security server that is induced by man-in-the-middle attack. To that purpose, we first investigate the state of the art in the current research about the abatement attack. After that, we propose a new countermeasure method that can cope with the unresolved problems in the current method, which can cover diverse types of network.
Building an Overseas Infrastructure Offices of the Information Security Industry
Cho, Chang-Duk ; Park, Dea-Woo ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 103~109
DOI : 10.6109/jkiice.2016.20.1.103
The information security industry is technology-intensive, high value-added industries. South Korea's response has excellent ICT skills and experience and skills in a variety of cyber attacks, has become a benchmark in the world. However, the small size of the domestic information security company, supporting infrastructure is lacking. Domestic information security industry is the primary condition to activate the export. For the export of high value-added enterprise information security products and services, it is necessary the establishment of the domestic IT information security infrastructure of the industrial promotion is based overseas. Come to analyze the domestic information security industry, capital of this small, market reclamation of overseas expansion, information, manpower shortage was a problem. This fact, combined losses caused by cost-free period AS. Therefore, the study on information security in the infrastructure industry overseas bases is necessary. How to select and analyze the causes of infrastructure in selected overseas offices. By utilizing the infrastructure of overseas bases, can raise the added value of the products and services of the Information Security company, we can enable the export of small and medium Information Security company from overseas offices.
A 1.88-mW/Gb/s 5-Gb/s Transmitter with Digital Impedance Calibration and Equalizer
Kim, Ho-Seong ; Beak, Seung-Wuk ; Jang, Young-Chan ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 110~116
DOI : 10.6109/jkiice.2016.20.1.110
This paper describes 1.2-V 5-Gb/s scalable low voltage signaling(SLVS) differential transmitter(TX) with a digital impedance calibration and equalizer. The proposed transmitter consists of a phase-locked loop(PLL) with 4-phase output clock, a 4-to-1 serializer, a regulator, an output driver, and an equalizer driver for improvement of the signal integrity. A pseudo random bit sequence generator is implemented for a built-in self-test. The proposed SLVS transmitter provides the output differential swing level from 80mV to 500mV. The proposed SLVS transmitter is implemented by using a 65-nm CMOS with a 1.2-V supply. The measured peak-to-peak time jitter of the implemented SLVS TX is about 46.67 ps at the data rate of 5Gb/s. Its power consumption is 1.88 mW/Gb/s.
Design of 24-GHz Power Amplifier for Automotive Collision Avoidance Radars
Noh, Seok-Ho ; Ryu, Jee-Youl ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 117~122
DOI : 10.6109/jkiice.2016.20.1.117
In this paper, we propose 24-GHz CMOS radio frequency (RF) power amplifier for short-range automotive collision avoidance radars. This circuit contains common source stage with inter-stages conjugate matching circuit as a class-A mode amplifier. The proposed circuit is designed using TSMC
mixed signal/RF CMOS process (
). It operates at the supply voltage of 2V, and it is designed to have high power gain, low insertion loss and low noise figure in the low supply voltage. To reduce total chip area, the circuit used transmission lines instead of the bulky real inductor. The designed CMOS power amplifier showed the smallest chip size of
, the lowest power consumption of 40mW, the highest power gain of 26.5dB, the highest saturated output power of 19.2dBm and the highest maximum power-added efficiency of 17.2% as compared to recently reported results.
Hardware Design of High Performance Arithmetic Unit with Processing of Complex Data for Multimedia Processor
Choi, Byeong-yoon ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 123~130
DOI : 10.6109/jkiice.2016.20.1.123
In this paper, a high-performance arithmetic unit which can efficiently accelerate a number of algorithms for multimedia application was designed. The 3-stage pipelined arithmetic unit can execute 38 operations for complex and fixed-point data by using efficient configuration for four 16-bit by 16-bit multipliers, new sign extension method for carry-save data, and correction constant scheme to eliminate sign-extension in compression operation of multiple partial multiplication results. The arithmetic unit has about 300-MHz operating frequency and about 37,000 gates on 45nm CMOS technology and its estimated performance is 300 MCOPS(Million Complex Operations Per Second). Because the arithmetic unit has high processing rate and supports a number of operations dedicated to various applications, it can be efficiently applicable to multimedia processors.
Comparison and Analysis on magnetic structures of Switched Reluctance Motors
Oh, Seok-Gyu ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 131~141
DOI : 10.6109/jkiice.2016.20.1.131
SRM is designed to meet operating standards such as low cost, simple magnetic structure, a desired operating speed range, high efficiency, high performance, and good matching for DC power. The magnetic flux of SRM is independent of its direction to develop a torque and it allows the flexible characteristics of the magnetic structure for SRM. In this paper, SRM can widely classify two types, Radial-Flux SRM and Axial-Flux SRM, according to the flux direction. Radial-Flux SRM includes Conventional, Segmented stator and rotor, and Double stator SRM, etc. and Axial-Flux SRM includes C-core stator and the Axial-airgap SRM. This paper is subjected the basic characteristics to select the best of the magnetic structure of SRM in the appropriate application by the classification of SRM.
Positioning Method Using a Vehicular Black-Box Camera and a 2D Barcode in an Indoor Parking Lot
Song, Jihyun ; Lee, Jae-sung ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 142~152
DOI : 10.6109/jkiice.2016.20.1.142
GPS is not able to be used for indoor positioning and currently most of techniques emerging to overcome the limit of GPS utilize private wireless networks. However, these methods require high costs for installation and maintenance, and they are inappropriate to be used in the place where precise positioning is needed as in indoor parking lots. This paper proposes a vehicular indoor positioning method based on QR-code recognition. The method gets an absolute coordinate through QR-code scanning, and obtain the location (an relative coordinate) of a black-box camera using the tilt and roll angle correction through affine transformation, scale transformation, and trigonometric function. Using these information of an absolute coordinate and an relative one, the precise position of a car is estimated. As a result, average error of 13.79cm is achieved and it corresponds to just 27.6% error rate in contrast to 50cm error of the recent technique based on wireless networks.
Implementation of the Passenger Positioning Systems using Beacon
Jeong, Seon-Jae ; Yim, Jae-Hong ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 153~160
DOI : 10.6109/jkiice.2016.20.1.153
In this paper, we propose a system that tracks the position of the passengers and sailors using a Bluetooth-based Beacon in the ship. The position of the tracking passengers, sometimes fatal emergencies of the rescue team, such as the sinking of the ship is utilized in order to efficiently and quickly rescue the passengers, and the collected data can be utilized additionally by grasping the flow of human traffic patterns. The system proposed in this paper, install MAC data acquisition called AP (Access Point) for each cabin, and in the installed AP retrieves Tag of the information provided to the passenger and collected. A Tag has only its own MAC Address to the privacy, no user information is not collected. All data communication by sending and receiving MAC Address was only to ensure anonymity.
Radiation Effects on Fiber Bragg Grating Sensors Written in UV KrF Laser Process Condition
Kim, Jong-Yeol ; Lee, Nam-Ho ; Jung, Hyun-Kyu ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 161~166
DOI : 10.6109/jkiice.2016.20.1.161
We studied the effect of
gamma-radiation on the FBGs by a variation of grating the fabrication parameters. The FBGs were fabricated in a different UV KrF laser intensity using the same boron co-doped photo-sensitive fiber and exposed to gamma-radiation up to a dose of 33.8 kGy. According to the experimental data and analysis results, We confirmed that the laser intensity for grating inscription has a highly effect on the radiation sensitivity of the FBGs and the radiation-induced Bragg wavelength shift by the change of laser process condition showed a difference more than about 30 %.
Computational generation method of elemental images using a Kinect sensor in 3D depth-priority integral imaging
Ryu, Tae-Kyung ; Oh, Yongseok ; Jeong, Shin-Il ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 167~174
DOI : 10.6109/jkiice.2016.20.1.167
In this paper, we propose a generation of 2D elemental images for 3D objects using Kinect in 3D depth-priority integral imaging (DPII) display. First, we analyze a principle to pickup elemental images based on ray optics. Based on our analysis, elemental images are generated with both RGB image and depth image recorded from Kinect. We reconstruct 3D images from the elemental images with the computational integral imaging reconstruction technique and then compare various perspective images. To show the usefulness of the proposed method, we carried out the preliminary experiments. The experimental results reveal that our method can provide correct 3D images with full parallax.
Implementation of Capacitance Measurement Equipment for Fault Diagnosis of Multi-channel Ultrasonic Probe
Kang, Bub-Joo ; Kim, Yang-soo ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 175~184
DOI : 10.6109/jkiice.2016.20.1.175
In this paper, we propose the method to measure the capacitances using not LCR meter but capacitance to voltage(C/V) conversion. And we design the analog MUX circuits that convert 192 channels to 6 MUX channels in order to implement the diagnosis of multi-channel ultrasonic probe. This paper derives the conversion function that converts the digital voltage of each MUX channel to the capacitance using the least squares method because the circuit characteristics that convert the voltage of each MUX channel to the capacitance are different. The developed prototype illustrates the performance test results that the measure times are measured by within 4sec and the measure error rates of maximum, minimum, and average values are within 5% in terms of the repeated measurements of all 192 channels.
Comparison on Smartphone Addiction Tendencies According to the Lifestyle Characteristics of Undergraduates on Internet Environment
Kim, Kyung-Hee ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 185~192
DOI : 10.6109/jkiice.2016.20.1.185
The purpose of this study is to compare smartphone addiction tendencies among the subdivided groups of undergraduates according to their lifestyle characteristics integratively. The results of positive analysis are as follows: first, undergraduates' lifestyles were drawn as six factors: the 'economic oriented type', 'aggressive activist type', 'fashion pursuing type', 'self-confident type', 'materialistically oriented type', and 'free will pursuing type'. Second, according to the result of dividing the groups based on the six factors, they were classified into the 'fashion pursing group', 'self-confident group', and 'aggressive, self-confident, and materialistically oriented group'. Third, each of the subdivided groups showed significant difference in smartphone addiction. Generally, the 'fashion pursuing group' indicated higher smartphone addiction tendencies than the other group. The findings of this study can provide fundamental and useful information to solve problems related to smartphone addiction resulted from excessive use of smartphones and causing a lot of troubles socially and also in health.
Social Network Analysis of author's interest area in Journals about Computer
Lee, Ju-Yeon ; Park, Yoo-Hyun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 193~199
DOI : 10.6109/jkiice.2016.20.1.193
Recently there are many researches about analyzing the interaction between entities by social network analysis in various fields. In this paper, we are going to analyze the author's interests area at the biography section in Journal of the Korea Institute of Information and Communication Engineering by social network analysis. The results show that many authors in that journal are mainly focusing on embedded, security, image processing, wireless network, big data, USN, network, RFID.
Distributing Board Monitoring System based on Internet of Things
Lee, Young-Dong ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 200~206
DOI : 10.6109/jkiice.2016.20.1.200
It is necessary to develop a real-time monitoring system for electric facilities, operating and managing system for the accident prevention of electrical demand facilities anytime, anywhere. In this paper, we propose the implementation of distributing board monitoring system based on Internet of Things(IoT). The proposed system is installed in existing distributing board that it can transmit status information of distributing board and control information through the cloud server and the wireless local area network. The distributing board monitoring system can monitor and control the condition of distributing board by system administrator. The results show that the margin of error was
in performance evaluation.
Indoor Positioning Using RFID Technique
Yoon, Chang-sun ; Kim, Tae-in ; Kim, Hyeon-jin ; Hong, Yeon-chan ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 207~214
DOI : 10.6109/jkiice.2016.20.1.207
RFID technology is a technology perceiving information with the device called reader and tag which is now used in public transportation such as Hi-pass. In this paper, we design a system which tracks indoor location using this technology. GPS, the most frequently used location-tracking system, has a defect that its accuracy decreases when the device is indoor. In suggested experiment, we simulate signals according to the moving of located objects, then compare with the result of the experiment. Based on the extracted data, we inform data which is for the purpose of tracking system based on analysis of the route and errors. Simulations for the tracking were performed with relocation of real objects. In the real experiment, we arrange the readers around the room and move the tagged object that we like to know the location, then analyze the data from the equipment. This paper suggests the analyzed data for the future indoor tag tracking applications. We expect that the RFID based location positioning data will be used for other indoor positioning research and development.
Development of a Large Quantity of Inputs Interface System Using a Single Chip microcontroller
Park, Ju-Tae ; Choi, Duck-sung ; Jeong, Seung-Hyun ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 215~221
DOI : 10.6109/jkiice.2016.20.1.215
In this thesis we introduce a large quantity of input interface system using a low cost single chip microcontroller which is consists of walking board with 1600 switches, RS485 communication for switch data communication and PC application software for walking pattern analysis. When a pedestrian walks on the walking board, the pattern analysis of foot pressed switches can be utilized on diverse divisions of sports and industry such as walking physical therapy, dancing, a large quantity of sensors interface system, etc.
Influences Analysis of SAS Azimuth Resolution on the UUV Trajectory Disturbances
Kim, Boo-il ;
Journal of the Korea Institute of Information and Communication Engineering, volume 20, issue 1, 2016, Pages 222~229
DOI : 10.6109/jkiice.2016.20.1.222
Active synthetic aperture sonar on the small UUV is generated several trajectory disturbances under the influences of underwater environments, and causing a large error in the synthetic aperture processing. In this paper, we analyzed the effects of azimuth resolution for the phase mismatch of the synthetic aperture focus processing when the periodic or random trajectory disturbances was generated on the side direction. The simulation results show that ghost targets are generated and azimuth resolution is very deteriorated when disturbance amplitude is greater than
and disturbance period is greater than
in the periodic trajectory disturbances environments. And detection performance on the seabed small objects by the synthetic aperture processing is shown that there is a significant effects on the azimuth resolution depending on the types and conditions of the platform trajectory disturbance variations.