• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1109-1111
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• 2009

Android OpenGL ES Issue Report에서 제기된 Android Emulator에서의 OpenGL 연산속도 문제를 Matrix 연산이 많이 사용되는 OpenGL 3D 구현에서 확인하고 이를 개선할 수 있는 방법을 제시한다. Android Emulator에 포함된 OpenGL ES는 소프트웨어 방식의 OpenGL ES 1.5가 사용되고 있다. 이때 Floating Point가 개선되면 3D의 연산 속도를 높일 수 있을 것이다. 이를 위하여 본 논문에서는 Android Emulator를 수정하여 개선하고, 샘플코드를 통해 테스트 결과를 제시한다.

• Journal of the Korean Institute of Telematics and Electronics
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• v.13 no.2
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• pp.28-33
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• 1976

In recent years, Microprocessor have the use of extended wide fiexd because of obtainable to low price. Design of computer system be easy to do by this microprocessor apply validly. This Papers: NOVA Emulator designed by use of MMI-6701. As a result of this studies, quantity of IC changed with about a third part by NOVA exchanged with Microprocessor. Micro Instruction of PROM consist of 32bit that designed Instruction Format of four kinds.

• Journal of information and communication convergence engineering
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• v.18 no.1
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• pp.1-7
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• 2020

This paper proposes a fast-processing and low-cost hardware multiple input multiple output (MIMO) channel emulator. The channel emulator is an important component of hardware-based simulation systems. The novelty of this work is the use of sharing and pipelining functions to reduce hardware resource utilization while maintaining a high sample rate. In our proposed emulator, the samples are created sequentially and interpolated to ensure the sample rate is equal to the base band rate. The proposed 4 × 4 MIMO requires low-cost hardware resource so that it can be implemented on a single field-programmable gate array (FPGA) chip. An implementation on Xilinx Virtex-7 VX980T was found to occupy 10.47% of the available configurable slice registers and 12.58% of the FPGA's slice lookup tables. The maximum frequency of the proposed emulator is 758.064 MHz, so up to 560 different paths can be processed simultaneously to generate 560 × 758 million × 2 × 32 bit complex-valued fading samples per second.

• Journal of Korea Multimedia Society
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• v.19 no.3
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• pp.548-556
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• 2016

Integral imaging is an auto-stereoscopic display method that can produce 3D image of a finite viewing window through an array of micro elemental lenses. Integral imaging requires the pickup part of each elemental images acquisition and display part of reconstruction of the images. The successful reconstructed image depends on various parameters such as distance between lens arrays and display device, focal length of lenses, and a number of the array. In this paper, we present reconstruction emulator for display of Integral imaging in order to adjust parameters for 3D contents reconstruction and to observe the result from different configuration. Especially, we provide the user interface for the emulator to control the distance easily. We have confirmed through various experiments that the emulator adjusted the distance and could check error in the process of creating elemental images.

• ETRI Journal
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• v.31 no.4
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• pp.376-386
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• 2009

An active radio frequency identification (RFID) system has the advantages of a long identification distance and a good identification rate, overcoming passive RFID drawbacks. Therefore, interest in the development of active RFID systems has been gradually increasing in areas of harbor logistics and national defense. However, some identification failures between active RFID systems developed under the same standards have been reported, presumably due to a lack of development of accurate evaluation methods and test equipment. We present a realization of the hardware and software of an emulator to evaluate the standard conformance of an active RFID system in a fully anechoic chamber. The performance levels of the designed emulator are analyzed using Matlab/Simulink simulations, and the applicability of the emulator is verified by evaluating the standard conformance of a real active RFID tag. Finally, we propose a new evaluation method by incorporating a self-running test mode environment into the RFID tags to reduce testing time and increase testing accuracy. The application of the suggested method to actual tags improves measurement uncertainty by 0.56 dB over that obtained using existing methods.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.1
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• pp.55-68
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• 2010

IEEE WAVE is going through the final standardization process as the wireless access technology which provides drivers in high-speed vehicles with safety-related information and commercial services This paper presents an application-layer protocol for safe driving assistant service and a service system emulator based on this protocol. The safe driving assistant system includes a construction zone information service and a vehicle crash notification service, an emergency vehicle notification service, a probing service and a dilemma zone decision assistant service. Emulator System design for verifying functions of system, The emulator consists of an emulator server that models the movement of all vehicles and road states and a number of clients that models functional units for OBUs, RSUs, and a traffic control center).

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.61-63
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• 2004

GPS Phone 이 Location Service를 제공하기 위해서는 위성데이터를 GPS Phone 에 제공하는 PDE(Position Determination Entity) 가 필요한데 초기 개발단계에서 실제 PDE를 개발단계의 GPS Phone에 연동하기는 번거롭고 비효율적인 면이 많다. 따라서 실제 PDE를 대신하여 개발단계의 GPS Phone 에 위성데이타를 제공해 줄 SW가 필요하다. 이에 본 논문은 Location Service를 제공하는 GPS Phone 초기 개발단계에서의 시험을 위해 실제 PDE를 대신할 수 있는 PDE Emulator를 구현하였다.

• Proceedings of the IEEK Conference
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• 2003.07c
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• pp.2749-2752
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• 2003

Magnetocardiography is a very weak biomagnetic field generated from the heart. Since the magnitude of the biomagnetic field is in the order of a few pico Tesla, it is measured with a superconducting quantum interference device (SQUID). SQUID is a transducer converting magnetic flux to voltage, however, its range of linear conversion is very restricted. In order to overcome the narrow dynamic range. a flux locked loop is used to feedback the output field with opposite polarity to the input field so that the total Held becomes zero. This prevents the operating point of the SQUID from moving too far away from the null point thereby escape from the linear region. In this paper, an emulator for the SQUID sensor and feedback coil is proposed. Magnetic courting between the original field and the generated field by the feedback coil is emulated by electronic circuits. By using the emulator, FLL circuits are analyzed and optimized without SQUID sensors. The emulator may be used as a test signal for multi-channel gain calibration and system maintenance.

• Journal of the Korean Institute of Telematics and Electronics
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• v.13 no.2
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• pp.34-39
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• 1976

The purpose of this thesis is to make clear the problems which would arisc from the process of making the Minicomputer by the employment of LSI, and to examine a solution to the problems. This Simulation 19 do for value performance of NOVA Emulator which designed before this. As a result of this studies, The problem of the hardware design by Microprocessor, the problem to be accompanied with application of LSI to the computer in the furture, etc. are mentioned definitely.

• Journal of Advanced Marine Engineering and Technology
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• v.28 no.6
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• pp.1010-1016
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• 2004

In this paper, a scheme for estimating the parameters of solar cells and a NN-based emulator for predicting the maximum power point are presented. The diode model with series and shunt resistors is used to estimate parameters highly affecting its V-I characteristic curve and both a real-coded genetic algorithm and the model adjustment technique are employed. For implementing the emulator, a multi-layered neural network incorporating with the BP algorithm is used. A set of simulation works using both field data and generated data are carried out to demonstrate the effectiveness of the proposed method.