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手持式數位視訊廣播系統DVB-H之傳輸技術性能分析
Thesis

手持式數位視訊廣播系統DVB-H之傳輸技術性能分析

黃冠傑
Masters, National Tsing Hua University
2005

Abstract

數位視訊廣播手持式數位視訊廣播數據資料廣播時間切片多重協定封裝-前向糾錯里德-所羅門更正碼行動電視 Digital Video Broadcasting DVBDigital Video Broadcasting-Handheld DVB-HInternet Protocol-datacast IP-datacastTime-slicingMulti-Protocol Encapsulation-Forward Error Correction MPE-FECReed-Solomon CodeMobile TV
The specification of Digital Video Broadcasting-Handheld(DVB-H)developed by the European DVB Project has become European Telecommunications Standards Institute(ETSI)standard since Nov. 2004. Compared with the conventional applications in fixed or portable terminals, transmission technology applied to handheld terminals has to satisfy more stringent requirements and environmental limitations. To consider the backwards compatibility with DVB-T(Terrestrial), DVB-H adds 4K mode and some extended Transmission Parameter Signaling(TPS)on Physical Layer defined by DVB-T. To lower power consumption of receiver and to enhance mobility, DVB-H also utilizes two key technologies, Time-Slicing and MPE-FEC, on Data-Link Layer. Moreover, DVB-H stipulates that the form of datagrams from Network Layer must be accordance to that of Internet Protocol(IP). In addition to solve problems regarding power consumption and mobile reception, DVB-H even provides functions of soft-handover and accommodates with other networks. There are four emerging mobile-TV standards in the world presently. They are DVB-H from Europe, DMB from Korea, ISDB-T from Japan and MediaFLO, which is developed by Qualcomm. It is predictable that DVB-H will be the mainstream in the future. In this thesis, the development background and system concept of DVB-H will be introduced first. The contents of Physical Layer on DVB-T and DVB-H will also be explained clearly. And then, the technologies of Data-Link Layer, Time-Slicing and MPE-FEC, are going to be discussed along with the analyses about the relationship between various parameters and reception performance. Simultaneously, a novel decoding approach is proposed to improve the MPE-FEC decoding efficiency. Some simulation results are provided to verify the analysis results and the efficacy of the proposed MPE-FEC iterative decoding approach as my conclusion. Last but not least, we will recommend four strategies on how to select DVB-H system parameters based on the above findings.

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