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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Advanced Navigation Technology
Journal Basic Information
Journal DOI :
The Korea Navigation Institute
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Volume & Issues
Volume 17, Issue 6 - Dec 2013
Volume 17, Issue 5 - Oct 2013
Volume 17, Issue 4 - Aug 2013
Volume 17, Issue 3 - Jun 2013
Volume 17, Issue 2 - Apr 2013
Volume 17, Issue 1 - Feb 2013
Selecting the target year
Performances Comparison of Compact Network RTK User Based on Modelling of Multiple Reference Station Corrections
Song, June-Sol ; Park, Byung-Woon ; Kee, Chang-Don ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 475~483
DOI : 10.12673/jkoni.2013.17.5.475
In this paper, the performances of modeling methods for combining corrections from multiple reference stations for network user were compared and analyzed. The longer the distance between reference station and user is, the more the GPS errors are decorrelated. Based on this point, multiple corrections from reference stations which is constituting a network should be combined properly to be applied for user observation to eliminate GPS errors. There are many widely used conventional modeling methods and they are applied for Compact Network RTK users and user position accuracy is predicted by using residual errors in observation of user. Compact Network RTK is a technique of generating corrections which was developed by Seoul National University. As a result, the horizontal and vertical accuracies were within about 5 cm and 7 cm respectively with 95 % probability for all conventional modeling methods. In addition, we analyzed condition for reference station constellation for modeling method using height information.
Comparison of propagation models based on DTV field strength measurement in urban environment
Kang, Young-Heung ; Kwon, Yong-Ki ; Kim, Hyeong-Seob ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 484~490
DOI : 10.12673/jkoni.2013.17.5.484
With the rapid development of wireless communication at VHF and UHF bands, there is an increasing need for the reliable propagation prediction tools. Therefore, the different propagation models that have been developed in many countries as well as korea has been trying to secure a model suitable for their geographical area but then it is giving us a different result when we compared it to measured values. In this paper, based on the measurements of DTV broadcasting services in domestic urban area, analysis and comparison of ITU-R P.1546 and BCAST models provide errors between measured and predicted values, and some points for improving SMI system has been proposed. As a result, P.1546 model provides the valid predicted data similar to measured data, but BCAST model has some problems of large deviation and higher prediction to measured data. In future, these problems and diffractions due to high buildings need to be studied further.
Design of mobile communication antenna for total monitoring of the security light
Yoo, Jin-Ha ; Cho, Dong-Kyun ; Lee, Young-Soon ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 491~496
DOI : 10.12673/jkoni.2013.17.5.491
In this paper, a half-wavelength folded-slot antenna, which can be applied to RF module for 3G mobile communications by which security lights are monitored and controlled, is proposed. The proposed antenna can be regarded as modified folded-slot structure which has the size reduced to a half of conventional
folded-slot antenna and can be placed at the ground plane edge. In spite of that, the proposed antenna still maintain the advantage of conventional folded-slot antenna that input impedance is close to
. The antenna is designed and fabricated within the upper space of
substrate for 3G mobile communication frequency band. The measured impedance bandwidth and antenna gain are 390 MHz and 2 dBi respectively.
Algorithm of Channel Selection for DMO Communication in TETRA System
Lee, Soon-Hwa ; Kim, Chang-Bock ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 497~505
DOI : 10.12673/jkoni.2013.17.5.497
In TETRA(TErrestrial Trunked RAdio) standard, TMO(Trunked Mode Operation) communicates with the UE through the base station and it has a higher priority than DMO(Direct Mode Operation) which communicates with UE directly for channel allocation. As a result, the UE needs an algorithm which restricts the frequency allocation by TMO so that DMO can have a successful communication within the network. However, the TETRA DMO standard does not consider this issue. In this paper, we propose an active DMO channel selection algorithm which allocates a channel based on some additional information such as channel usage state of TMO and channel utilization of DMO. The experimental results show that the proposed algorithm outperforms existing DMO channel allocation scheme in terms of the transmission efficiency.
Optimal Spectrum Sensing Framework based on Estimated Miss Detection Probability for Aggregated Data Slots in Cognitive Radio Networks
Wu, Hyuk ; Lee, Dong-Jun ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 506~515
DOI : 10.12673/jkoni.2013.17.5.506
In cognitive radio networks, several research works typically address the framework which consists of a spectrum sensing period and a data transmission period. When the frame period is short, there is the problem that the throughput of secondary users decrease. In this paper, aggregated data slot structure is considered to increase the throughput of secondary users. Chapman-Kolmogorov equation is used for the modeling of the transmission probability of primary users and formulation of an optimization problem to maximize the throughput of secondary users. Solution of the optimization problem results in the optimal spectrum sensing time, the length of data slot and the number of data slots governed by a spectrum sensing.
The Study on Empirical Propagation Path Loss Model in the Antler Terminal Environment
Kim, Kyung-Tae ; Kim, Jin-Wook ; Jo, Yun-Hyun ; Kim, Sang-Uk ; Yoon, In-Seop ; Park, Hyo-Dal ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 516~523
DOI : 10.12673/jkoni.2013.17.5.516
In this paper, The path loss model of Air Traffic Control(ATC) telecommunication radio channel has been studied at the Incheon International Airport(IIA) with the terminal with two antlers. We measured two frequencies among VHF/UHF channel bands. The transmitting site radiated the Continuous Wave(CW). The propagation measurement was taken using the moving vehicle equipped with receiver and antenna. The transmitting power, frequency and antenna height are the same as the current operating condition. The path loss exponent and intercept parameters were extracted by the basic path loss model and hata model. The path loss exponents at passager terminal areas were 3.32 and 3.10 respectively in 128.2 MHz and 269.1 MHz. The deviation of prediction error is 9.69 and 9.65. The new path loss equation at the terminal area was also developed using the derived path loss parameters. The new path loss was compared with other models. This result will be helpful for the ATC site selection and service quality evaluation.
A study on the Scheme of Extending Break Power Controller for Permanent Magnet Synchronous Motor(PMSM) using a Microprocessorr
Na, Seung-Kwon ; Kim, Yeong-Wook ; Choi, Gi-Ho ; Hwang, Lark-Hoon ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 524~544
DOI : 10.12673/jkoni.2013.17.5.524
In this paper, A tow system of miniature establishes each motor to individual 1C1M methods to control for a permanent magnet synchronous motors (PMSM) is constructed. You assume that is wiring having had the ability that can all absorb regenerative power which occurred when permanent magnet synchronous motors(PMSM) brake is all used to it, and to occur about agreement use scope expansion my electricity. To regenerative braking power securities of a PMSM and to stop of the bronzes my a control security, and that the electricity as you apply to vector control method and an speed sensor of controller to microprocessor, And you studied to speed, motor electricity energy control method to the algorithm and you brake a revival by regenerative braking power securities of a permanent magnet synchronous motors. It is proposed that motor control method to the algorithm you brake a revival by electricity braking power securities, you do to simulations regarding a momentum load and experiment.
A Study on Generic Unpacking to Prevent Zombie Client on Mobile Platform
Ko, Jong-Bin ; Lee, Sang-Ha ; Shon, Tae-Shik ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 545~551
DOI : 10.12673/jkoni.2013.17.5.545
Packed technique makes difficult to respond quickly because the malicious-code is reduced size that easy to diffusion and changed code that make spend longer time for analysis. In this paper, we analysed the packing tool softwares and we proposed construction and detection methods of the packed technique for easy to analysis of the packed malicious code based on variation of entropy value.
Design of a Mobile Electronic Voucher Using Object Memory Model
Lee, Seong-Ho ; Cha, Byung-Rae ; Kim, Dae-Gue ; Joung, Ki-Bong ; Ji, Yoo-Kang ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 552~559
DOI : 10.12673/jkoni.2013.17.5.552
According to the recent increase of mobile commerce, the researches on electronic voucher payment based on NFC are lively made. However, most researches focus on the payment method using electronic vouchers, and so there is none for tracking circulation history of an electronic voucher. To address this problem, this paper proposes the method to store circulation information of an electronic voucher. The proposed method applies Object Memory Model (OMM) to an electronic voucher. When an electronic voucher is issued, transferred to other person, and used in payment, related information is stored at the object momory of an electronic voucher. So, our proposed object memory has three types of blocks, on which each information for issue, transfer, and payment of an electronic voucher is stored. We can retrieve and analyze the circulation history of an electronic voucher using this information. In the future, we will implement the proposed an electronic voucher and propose the method to analyze circulation information.
A Study on the Fault Detection of ASIC using Dynamic Pattern Method
Shim, Woo-Che ; Jung, Hae-Sung ; Kang, Chang-Hun ; Jie, Min-Seok ; Hong, Gyo-Young ; Ahn, Dong-Man ; Hong, Seung-Beom ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 560~567
DOI : 10.12673/jkoni.2013.17.5.560
In this paper, it is proposed the fault detection method of the ASIC, without the Test Requirement Document(TRD), extracting internal logic circuit and analyzed the function of the ASIC using the multipurpose development program and simulation. If there don`t have the TRD, it is impossible to analyze the operation of the circuit and find out the fault detection in any chip. Therefore, we make the TRD based on the analyzed logic data of the ASIC, and diagnose of the ASIC circuit at the gate level through the signal control of I/O pins using the Dynamic Pattern signal. According to the experimental results of the proposed method, we is confirmed the good performance of the fault detection capabilities which applied to the non-memory circuit.
Differential Fault Analysis on Symmetry Structured SPN Block Cipher
Lee, Chang-Hoon ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 568~573
DOI : 10.12673/jkoni.2013.17.5.568
In this paper, we propose a differential fault analysis on symmetry structured SPN block cipher proposed in 2008. The target algorithm has the SPN structure and a symmetric structure in encryption and decryption process. To recover the 128-bit secret key of the target algorithm, this attack requires only one random byte fault and an exhaustive search of
. This is the first known cryptanalytic result on the target algorithm.
Study on the Improvement of wear properties of Automobile elements in Titanium alloy Coated
Yu, Hwan-Shin ; Park, Hyung-Bae ;
The Journal of Advanced Navigation Technology, volume 17, issue 5, 2013, Pages 574~580
DOI : 10.12673/jkoni.2013.17.5.574
In this paper, The process of thin-film coating technology was applied to improve adhesion of the hardness thin film and nitride layer. This thin-film coating technology have formed composite thin-film to gain hardness and toughness used in press mold. The thin-film coating manufacturing technology increased vacuum present in the vacuum chamber and improved the throw ratio of the gun power using physical vapor deposition coating technology. Ti alloys target improved performance and surface material through the development of a composite film coating technology for various precision machining parts.