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$\pi/4$ QPSK 위성 IP 모뎀부 설계 및 구현
강정모,정재욱,김명식,오우진,Kang, Jung-Mo,Jung, Jae-Wook,Kim, Myung-Sik,Oh, Woo-Jin 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.10
본 논문에서는 위성통신용 IP 모뎀부를 설계 및 구현하였다. 위성 IP모뎀을 위성 의 전송 대역폭, 통신 효율성 등을 고려하여 0.2%의 오버헤드, $E_b/N_o=6dB$에서 $BER=10^{-5}$, 8KHz의 주파수 보정, 1536Kbps 데이터율, 140MHz의 IF 주파수를 갖도록 설계하였다. 설계된 시스템은 시뮬레이션을 통하여 검증하고 MPC86x 통신 프로세서, TMS320C6416 DSP, FPGA 등으로 모듈구조로 구현하여 개발시간의 단축과 성능개선이 용이한 장점을 갖고있다. IP 연동 및 다중 처리를 위한 임베디드 OS로 리눅스를 이용하여 모뎀의 각 하드웨어 에 대한 디바이스 드라이버를 설계하였다. 개발된 하드웨어는 위성 채널 시뮬레이터로 시험하여 검증하였다. 제안된 IP 모뎀은 휴대형으로 설계 되어 어느 곳에서든지 Internet 통신환경을 제공할 수 있다. In this paper, we introduce the design and implementation of satellite IP modem. The designed satellite IP modem shows the performance of 0.2% overhead, BER=10-5 when Eb/No=6dB, frequency offset of 8KHz, data rate up to 1536Kbps, $F_{if}=140MHz$. The designed system is verified through software simulation and then implemented with MPC86x communication processor, TMS320C6416 DSP, and Altera FPGA. Since each hardware unit is implemented in daughter board for modularity, we can reduce the development time and easily improve the performance with using better processor. Linux is used for embedded OS because it shows better performance in IP manipulation multitask processing, and hardware control through device driver. The implemented system is tested and verified with channel simulator. Since the proposed IP modem shows small size and light weight, that can be used anywhere with easy if you need IP environment.
강정모(Jung-Mo Kang),이헌길(Heon-Guil Lee) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.1A
XML은 인터넷상에서 복잡한 문서의 원활한 처리와 신속한 탐색 및 항해가 가능한 차세대 웹 언어로 각광받고 있다. XML로 표현된 문서들은 세분화된 계층구조(granularity hierarchy)로 나타낼 수 있으므로 필요한 구성 요소에만 액세스 제어가 가능하다는 장점이 있다. 묵시적 권한 부여 기법은 명시적으로 저장된 권한으로부터 유도되는 권한기법으로 모든 구성 요소들에 대해 규칙들을 명시적으로 저장해야 하는 비효율적인 명시적 권한 부여 기법보다 상위 구성 요소에 대한 한번의 권한 부여로 하위 구성 요소들에 동일한 권한부여 효과를 얻을 수 있다. 본 논문은 XML 문서를 위한 묵시적 권한 부여 기법을 제시하여 XML 문서의 액세스 제어 시 권한 부여 시간 및 메모리의 효율성을 높인다.
강정모(Jung Mo Kang),원상호(Sang Ho Weon) 한국경제학회 2001 經濟學硏究 Vol.49 No.4
The purpose of this paper is to examine comparative advantage, trade profile and the degree of similarities or differences in the comparative advantage of NEA economies. There is great deal of similarity between Korea, China, Hong Kong, and Taiwan with respect to the RCA structure of RCA index. However, the RCA structure for Japan significantly differs from the rest of its NEA neighbors. An analysis on the RCA profiles indicates an increase in the maturity of export structure for Korea, China and Japan over the period. However, Chinas export structure is still in a relatively immature stage and will undergo considerable evolution.
강정모(Jung-Mo Kang),이진영(Jin-Young Lee),연창근(Chang-Kun Yeon) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.11
This paper is to introduce a solution about preliminary risk and a supplement for construction through the BIM design case in building remodeling. The BIM design with 3D scanner is the method for reducing the construction period and cost in the building remodeling. In leading countries, the BIM design with 3D scanner was reached high level in the construction and facility management, and it is composed the lively 3D modeling. In addition, The artificial intelligence 3D building management system is developing with cloud service and personal smart mobile recently. It has been gained sympathy to more and more building clients and users because that design planning using 3D scanners (of laser methods) can improve the accuracy of drawings and advantage economically that can reduce the cost of construction and shorten the period construction.
강정모(Jung-Mo Kang),이진영(Jin-Young Lee),홍민호(Min-Ho Hong) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
Approximately 10 years have passed since BIM design was introduced, but it will take a lot of industry effort, time, and designers" experience to become common in designing facilities. Nevertheless, the reason why we are interested in BIM is that it can improve the quality of design through verification, among other things, productivity, efficiency, and collaboration among other processes compared to conventional design methods. As the world is aiming for low-carbon, green growth, eco-friendly buildings, smart buildings are becoming taken for granted, and the establishment of three-dimensional models (BIM) through AI, automation of design through AI, automatic construction of robot use, and autonomous maintenance of AI-based management are increasingly becoming our reality. The establishment of the Total BIM Process from the planning design to the building operation stage is the future and response of the Korean construction and design sector. The MEP design need to be more adaptable and competitive with BIM in order to keep up with the trends of these times.
강정모(Kang Jung Mo),이헌길(Lee Heon Gil) 강원대학교 산업기술연구소 2001 産業技術硏究 Vol.21 No.1
An XML is an markup language which has been focused on the next generation Web programming language. It easily represents the complex structure of a document, and it is possible to provide the access control over each component of an XML document. An implicit authorization technique means that granting an authorization to a node has effect on granting the same implicit authorization to its all descendants. Therefore, it enhances the time for the authorization grant and reduces the memory required for the authorization information. An authorization technique using an intention type and a authorization replacement solves a redundancy problem and decides whether the access is possible or the authorization conflict occurs at the first attempt.