Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7719
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dc.contributor.advisor楊谷章zh_TW
dc.contributor.advisor溫志宏zh_TW
dc.contributor.advisor劉明壽zh_TW
dc.contributor.advisor楊晴雯zh_TW
dc.contributor.author林屏zh_TW
dc.contributor.authorping, linen_US
dc.date2004zh_TW
dc.date.accessioned2014-06-06T06:40:25Z-
dc.date.available2014-06-06T06:40:25Z-
dc.identifier.urihttp://hdl.handle.net/11455/7719-
dc.description.abstract國家數位化政策目標已明確,衛星、地面電台與有線電視等系統數位化之整體平台規格也已確定,如何在每一平台上使傳輸速率更快及傳輸量更大,為今後努力之方向,亦為本論文研究之目的與動機。 本論文首先敘述有線電視之發展與目前系統網路最新架構,再利用不同環境如郊區、工廠區與住宅區等上行頻帶環境實際量測,瞭解現今有線電視HFC雙向網路之瓶頸:目前傳輸網路架構之缺點與上行低頻5~42MHz頻帶雜訊之干擾等問題。研討利用FDMA多重接取技術將現今單一頻帶傳輸網路架構改以多頻帶傳輸網路架構,不但能保留原規劃網路架構,節省人力與時間外,亦可節省投資成本且可使傳輸量倍數增加,以滿足未來互動多媒體時代之來臨。zh_TW
dc.description.abstractThe goal of the national digital policy is clear, and the whole platform specifications of the satellite, terrestrial radio station and the cable TV system are also definite. How to improve the transmission rate and capacity is our aim to achieve in the future, which is also the main purpose and motivation of this thesis. In this thesis, we investigate the development of cable TV and the new structure of the present systematic network. First, by practically measuring different upstream frequency circumstances such as suburbs, areas of factories, residential districts, we aim to find the bottleneck of the modern HFC cable TV two-way network, such as the defects of the present transmission network structure and problems about the noise interference of 5~42 MHz upstream low frequency. Then we will use FDMA technique to change the present single-band transmission network structure to the multi-band transmission, which does not only keep the original network structure, save manual work and time, but also save the cost of investment and double the transmission capacity, and hence can satisfy the coming of the future interactive multimedia age.en_US
dc.description.tableofcontents目 錄 中文摘要--------------------------------------------------------------------------i英文摘要-------------------------------------------------------------------------ii 誌謝------------------------------------------------------------------------------iii 目錄------------------------------------------------------------------------------iv 圖表目錄------------------------------------------------------------------------vi 第一章 緒論-------------------------------------------------------------------- 1 1.1 國家政策對數位化發展目標-------------------------------------- 1 1.2 數位化系統傳輸平台規格------------------------------------------2 1.3 研究目的與動機----------------------------------------------------- 3 1.4 論文架構 4 第二章 有線電視系統簡介 5 2.1 有線電視之網路發展 ----------------------------------------------- 5 2.2 有線電視HFC網路架構 6 2.3 有線電視雙向網路系統運作情形 8 2.4 數位有線電視網路規劃時考慮因素 10 2.5 數位雙向有線電視網路現況與瓶頸 11 第三章 有線電視數位傳輸系統關鍵技術 25 3.1數位調變技術 25 3.2 FDMA多重接取技術 33 第四章 FDMA多頻帶網路效益 37 4.1 雙向有線電視之數位傳輸原理與流程 37 4.2 疏鬆區網路一組頻帶之運作與架構 42 4.3 密集區網路多組頻帶之運作與架構 45 4.4 利用多頻帶網路架構之效益 49 第五章 結論與未來工作 52 5.1 結論 52 5.2 未來工作 53 參考文獻 55zh_TW
dc.language.isoen_USzh_TW
dc.publisher電機工程學系zh_TW
dc.subjectCable Modemen_US
dc.subject纜線數據機zh_TW
dc.subjectSet Top-Boxen_US
dc.subject數位機上盒zh_TW
dc.title數位雙向有線電視網路系統研究zh_TW
dc.titleStudy on Digital Two-way Cable TV Network Systemen_US
dc.typeThesis and Dissertationzh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
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