한국해양대학교

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이동형 DVB-S2 기반 최적의 상위계층 부호화 방식에 관한 연구

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dc.contributor.author 최석순 -
dc.date.accessioned 2017-02-22T06:52:10Z -
dc.date.available 2017-02-22T06:52:10Z -
dc.date.issued 2009 -
dc.date.submitted 56904-11-11 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175670 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/9938 -
dc.description.abstract Efficient support for digital broadcasting (DVB) services in mobile systems is crucial for mobile operators and broadcasters. Several DVB systems are currently in development internationally, to meet these challenges, and there have been several competing standards proposed (T-DMB, DVB-H, S-DMB) with different characteristics and performance. DVB-H(Digital Video Broadcasting for Handhelds terminal) is a relatively new data broadcasting standard that enables delivery of various Internet Protocol(IP) based services to mobile receivers. The DVB-H standard, which is based on and compatible with DVB-T(DVB-Terrestrial), introduces a solution to problems caused by mobility and a long-term fading channel. The DVB-H standard, MPE-FEC (Multi-Protocol Encapsulation-Forward Error Correction), includes Reed Solomon (RS), combined with virtual interleaving, to compensate for a long-term fading environment. The DVB-T physical layer also consists of an additional in-depth interleaver that serves as a block and time interleaver, to compensate for a long-term fading channel. In this thesis, we described DVB-S2 system for mobility. Cross layer coding technique are needed to maintain the performance in deep fading channel. Cross layer coding is divided into two kinds of level. First level is Physical layer coding and, second layer is link layer or upper layer coding. Fixed on DVB-S2 short frame coding method as a physical layer, this thesis shows the simulation results for various coding method as an upper layer coding. Furthermore, for research on optimal cross layer coding method, this paper analyzed the performance of each coding method on according to mobile vehicle speed, data rate, interleaving memory size, and IP packet size. From the simulation results, perfect frame synchronization was assumed, as well as perfect symbol timing recovery, and this thesis summarized the important results. First, the most important result was that virtual interleaving is a crucial component for improving the performance in a long-term fading channel. This thesis confirmed that the performance is improved by increasing the virtual interleaving size and train speed. Second, this thesis concluded that the larger the virtual interleaving size, the greater the range of data rates provided, and the smaller the IP packet size, the better the performance. -
dc.description.tableofcontents 제 1 장 서론 = 9 제 2 장 규격서 분석 = 11 제 2-1 절 DVB-H 규격서 분석 = 11 2.1.1. Time Slicing = 17 2.1.2. Time Interleaving = 17 2.1.3. Unequal Error Protection (UEP) = 18 2.1.4. Multi Protocol Encapsulation Forward Error Correction (MPE-FEC) = 18 제 2-2 절 DVB-T 규격서 분석 = 19 3 장 제안 모델 = 26 제 3-1 절 FIFTH 제안모델 = 26 3.1.1. FIFTH 제안모델 Ⅰ = 26 3.1.2. FIFTH 제안모델 Ⅱ = 27 제 3-2 절 DVB-S2 제안모델 = 29 3.2.1. Time Interleaver = 30 3.2.2. Block interleaver = 31 제 4 장 Train interruption 채널 모델링 = 34 제 4-1 절 Train interruption 채널 모델링 방법 = 34 제 5 장 이동성 DVB-S2M에 적용할 수 있는 부호화 방식 = 36 제 5-1 절 UL-FEC에 적용될 수 있는 부호화 방식 = 36 5.1.1. RS 부호 및 Virtual interleaver = 36 5.1.2. Double Binary Turbo 부호 = 37 5.1.3. LDPC 부호 = 41 제 6 장 시뮬레이션 및 성능 평가 = 46 제 6-1 절 UL-FEC에 RS 부호를 적용했을 때의 성능 = 46 제 6-2 절 UL-FEC에 Double Binary Turbo 부호 적용 시의 성능 = 49 제 6-3 절 UL FEC에 LDPC 부호 적용 시의 성능 = 51 6.3.1. IEEE 802.16e 규격의 LDPC 부호의 성능 = 51 6.3.2. DVB-S2 규격의 LDPC 부호의 성능 = 53 6.3.3. LDPC 부호의 TI 환경에서의 성능 = 54 제 6-5 절 UL FEC의 LDPC 연/경판정 입력 시 성능 = 56 제 6-6 절 각 부호화 방식에서의 Data rate에 따른 성능 비교 = 57 제 6-7 절 MPE-FEC 메모리 사이즈에 따른 성능 = 60 제 6-8 절 IP packet 길이에 따른 성능 비교 = 62 제 6-9 절 최적의 parameter = 63 제 7 장 결론 = 64 참고문헌 = 66 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 이동형 DVB-S2 기반 최적의 상위계층 부호화 방식에 관한 연구 -
dc.title.alternative A Study on Optimal Upper Layer Coding Method based on DVB-S2 for Mobility -
dc.type Thesis -
dc.date.awarded 2009-02 -
dc.contributor.alternativeName Choi -
dc.contributor.alternativeName Seok Soon -
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