• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.1484-1490
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• 2009

Since the cooling performance of a $CO_2$ cooling cycle is varied significantly with a variation of refrigerant charge amount and outdoor temperature, the reliability of $CO_2$ system is down. In this study, the performance characteristics of three kinds of $CO_2$ systems were measured and analyzed by varying refrigerant charge amount and outdoor temperature so as to study the characteristics of variation with cycle option. The applied system options are the single-stage compression(1C-1E) system, two-stage compression with 1-EEV(2C-1E) system, and two-stage compression with 2-EEV(2C-2E) system. The performances of two-stage compression with 2-EEV system were less sensitive than those of other systems and the system operated safely and steadily for wide charge amount. The performance of the two-stage compression with 1-EEV(2C-1E) system was the most sensitive to the charge amount, and that of the single-stage compression(1C-1E) system varied a lot with outdoor temperature.

• ETRI Journal
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• v.27 no.5
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• pp.497-503
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• 2005

In this paper, we present a performance analysis for an MPEG-4 video codec based on the on-chip network communication architecture. The existing on-chip buses of system-on-a-chip (SoC) have some limitation on data traffic bandwidth since a large number of silicon IPs share the bus. An on-chip network is introduced to solve the problem of on-chip buses, in which the concept of a computer network is applied to the communication architecture of SoC. We compared the performance of the MPEG-4 video codec based on the on-chip network and Advanced Micro-controller Bus Architecture (AMBA) on-chip bus. Experimental results show that the performance of the MPEG-4 video codec based on the on-chip network is improved over 50% compared to the design based on a multi-layer AMBA bus.

• Journal of Advanced Marine Engineering and Technology
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• v.34 no.1
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• pp.125-132
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• 2010

IEC61162-3 known as NMEA2000 protocol is approved as a standard network of SOLAS ship by ISO and used for the instrument network which exchanges data in real-time. For easy the development of ship network equipments, this study is focused on the development of SoC which can convert to NMEA2000 protocol from various kind of protocols such as TCP/IP, NMEA0183, RS422 and others using FPGA and u-Blaze. In this paper, we composed NMEA2000 protocol stack on FPGA and verified NMEA2000 network communication of FPGA system by connecting with commercialized devices through PC Hyper-terminal and network monitoring program.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2003.11a
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• pp.229-233
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• 2003

In this paper we theoretically analyze the probability of error for M-ary pulse position modulation (PPM) ultra-wideband (UWB) multiple access system using Gaussian monopulse. The optimum detection of UWB signals using M-ary orthogonal PPM in additive white Gaussian noise (AWGN) and multiple access interference (MAI) is considered, then receiver signal to noise power ratio (SNR) and upper bound fur the bit error rate (BER) are derived. Numerical results considering some practical parameters are presented.

• 한국벤처창업학회:학술대회논문집
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• 2007.04a
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• pp.79-99
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• 2007

This paper evaluates the economic effect of the IT SoC Industrial Foundation Composition Project. The evaluation was done in three steps. The first step was to estimate the contribution effect of the fabless small and medium venture business' sales. The step includes interview with all the CEOs of the firms under the support of the Enterprise Incubation System, The second step was to apply input-output analysis and then estimate the production inducement effect. The last step was to compare the results of estimation with the costs of the project. We have concluded this project had achieved 6.3 times greater economic effect compared to the budget. The reason for the large economic effect is that the project provided various infrastructures to the small and medium venture businesses.

• The Magazine of the IEIE
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• v.30 no.9
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• pp.28-28
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• 2003

SoC(System on Chip)의 발전은 현재 널리 쓰이는 기존의 설계 방법론으로는 해결될 수 없는 여러 가지 문제들을 생성하고 있다. 제품의 복잡도는 급격히 증가하는 반면 제품 수명은 지속적으로 감소하고 있으며, 기존 구현 기술의 향상만으로는 해결하기 쉽지 않은 VDSM (Very Deep Sub-Micron) 문제 또한 새로이 도출되고 있는 실정이다. 이러한 문제들은 적기에 시장에 제품을 출시하는 데에 많은 어려움을 끼치게 되기 때문에, 기존의 방법론을 뛰어 넘는 새로운 설계 방법론을 위한 많은 연구들이 활발히 진행되고 있다. 이러한 방법론 중 효율적인 한 방안으로 "재사용"의 개념이 대두되고 있으며, platform-based design은 이러한 재사용의 개념을 SoC 설계에 효율적으로 적용할 수 있는 방법으로 많은 관심을 받고 있다. 본 논문은 이러한 platform-based design의 최근 동향 및 현재 삼성전자에서 추진하고 있는 platform-based design에 대해 기술한다.

• The Magazine of the IEIE
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• v.30 no.9
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• pp.934-941
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• 2003

SoC(System on Chip)의 발전은 현재 널리 쓰이는 기존의 설계 방법론으로는 해결될 수 없는 여러 가지 문제들을 생성하고 있다. 제품의 복잡도는 급격히 증가하는 반면 제품 수명은 지속적으로 감소하고 있으며, 기존 구현 기술의 향상만으로는 해결하기 쉽지 않은 VDSM (Very Deep Sub-Micron) 문제 또한 새로이 도출되고 있는 실정이다. 이러한 문제들은 적기에 시장에 제품을 출시하는 데에 많은 어려움을 끼치게 되기 때문에, 기존의 방법론을 뛰어 넘는 새로운 설계 방법론을 위한 많은 연구들이 활발히 진행되고 있다. 이러한 방법론 중 효율적인 한 방안으로 "재사용"의 개념이 대두되고 있으며, platform-based design은 이러한 재사용의 개념을 SoC 설계에 효율적으로 적용할 수 있는 방법으로 많은 관심을 받고 있다. 본 논문은 이러한 platform-based design의 최근 동향 및 현재 삼성전자에서 추진하고 있는 platform-based design에 대해 기술한다.

• Journal of the Korea Society of Computer and Information
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• v.21 no.1
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• pp.39-47
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• 2016

In this paper, we propose vehicle SoC fault diagnosis platform using FlexRay protocol in order to detect the faults of semiconductor control chip even after vehicle production. Before FlexRay protocol by sending NFI (Null Frame Indicator) bit among the header segment and a specific identifier in the payload segment of FlexRay frame, this technique can be distinguishable from normal mode and test mode. By using this technique, it is possible to detect the faults such as performance degradation of vehicle network system caused by the aging or several problems of vehicle semiconductor chip. Also high reliability and safety of vehicle can be maintained by using structural test for vehicle SoC fault detection.

• Korean Journal of Computational Design and Engineering
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• v.14 no.5
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• pp.338-345
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• 2009

c-PMS(collaborative project management system) is a business process(BP) based tool to manage collaborative projects which accomplish common business objectives determined by mutual agreement of companies using limited resources and time. This study analyzes collaborative BP, collaborative projects, and their relation, and proposes the architecture and operation scenario of c-PMS consisted of business process asset management(BPAM) sub-system and project manage(PM) sub-system. BPAM sub-system models private and public BP using a client/server based modeler, defines collaborative BPs process from public BPs, and manages them as companies' asset on a web portal. PM sub-system globally manages collaborative project using planning, execution, monitoring, and analyzing functions.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.959-962
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• 2009

Recently, a multi-core system is studied for single terminal's operations on various service networks for mobile systems. Therefore, it is expected that mobile systems capable of supporting WCDMA, GSM, and WiBro would be developed. Mobile systems for supporting various service networks is able to be implemented on a single chipset via SoC(System on Chip) technology, thus a noble modem design proper for SoC technology is necessary. As those systems shall be operated at different frequency band with only a single terminal, a problem that a nonlinear characteristic according to the system and its frequency band is occurred. In this paper a noble modem design for multi-core systems is proposed and the nonlinear characteristics for those systems is analysed. The proposed modem design is based on OFDM(Orthogonal Frequency Division Multiplexing) and MC-CDMA scheme. And nonlinear characteristic analysis is done by PSD measurement.