서지주요정보
DAMA-SCPC 위성 시스템의 변복조 모듈 개발 및 동기에 관한 연구 = Implementation of DAMA-SCPC modem for satellite communications and its synchronization algorithm
서명 / 저자 DAMA-SCPC 위성 시스템의 변복조 모듈 개발 및 동기에 관한 연구 = Implementation of DAMA-SCPC modem for satellite communications and its synchronization algorithm / 김조헌.
저자명 김조헌 ; Kim, Jo-Hun
발행사항 [대전 : 한국과학기술원, 1997].
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등록번호

8007719

소장위치/청구기호

학술문화관(문화관) 보존서고

MEE 97008

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초록정보

In the thesis work, we implement a MODEM using Demand Assignment Multiple Access-Single Channel Per Carrier(DAMA-SCPC) protocol for satellite communications and analyze the timing, carrier, and frequency synchronization algoritms suitable for voice and data transmission which require high BER(Bit Error Rate) performance. In the transmitter, voice and data are modulated by BPSK or QPSK, and transmitted in the burst mode. In the receiver, the symbol timing, carrier phase and frequency are synchronized by DD(Decision Direct) method. The synchronization is compose of three functional parts: 1) to perform the baud-rate timing recovery algorithm proposed by,Mueller&Muller 2) to perform the DD carrier phase recovery which has a PLL(Phase Locked Loop) form, and 3) to perform the carrier frequency recovery using a quardricorrelator. Through simulation, it is verified that they can work well so as to have a good estimated variance performancein noisy environment. Also, in this thesis work, a MODEM is implemented using 7 DSPs(Digital Signal Processors). The interprocessor-communication between DSPs is designed using TDM(Time Devision Multiplexer) protocol in order to reduce the hardware complexity. Through the TDM lines, the system management information and the results of calculation of algorithms at each DSP are transfered each other simultanuously at the high speed. The micellaneous circuits are integrated in two EPLDs(Erasable Programmable Logic Devices) for compact design. Because the implemented structure has a general form in view of signal processing systems, it can be utilized with flexibility at MODEMs for the other communication systems with various applications.

서지기타정보

서지기타정보
청구기호 {MEE 97008
형태사항 iii, 74 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jo-Hun Kim
지도교수의 한글표기 : 이황수
공동교수의 한글표기 : 박현욱
지도교수의 영문표기 : Hwang-Soo Lee
공동교수의 영문표기 : Hyun-Wook Park
학위논문 학위논문(석사) - 한국과학기술원 : 전기및전자공학과,
서지주기 참고문헌 : p. 73-74
주제 위성 시스템의 변복조 모듈과 동기
DAMA SCPC 시스템
Modem for satellite communications and its synchronization algorithm
DAMA SCPC
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