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研究生:徐瑋隆
研究生(外文):Wei-Lung Hsu
論文名稱:可調式網路通道編碼選擇策略之研究
論文名稱(外文):Strategy Investigations for Adaptive Network Channel Coding Selection
指導教授:楊豐瑞楊豐瑞引用關係
指導教授(外文):Fongray Frank Young
學位類別:碩士
校院名稱:逢甲大學
系所名稱:通訊工程所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:中文
論文頁數:78
中文關鍵詞:迴旋碼通道編碼B3G渦輪乘積碼循環碼渦輪碼BCH碼錯誤修正錯誤偵測3G行動通訊
外文關鍵詞:convolutional codechannel codingB3Gerror detectionTPC.Turbo Codeerror correctionBCH codemobile communication3GCyclic Code
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隨著網際網路的高度發展與通訊網路的普及,已使得提升網路頻寬與網路服務品質受到高度的注目;為了能大量地傳輸資訊,除了消極的提高頻寬之外,在積極面充分地使既有的頻寬發揮最大效益,也是一個極大的課題,這便是通道編碼的目的。在各式各樣的通道編碼中,各有各的優勢與其應用層面,這使得如何選擇通道編碼成為效率與可靠度間的兩難問題。為此,本文提出一個可供選擇性的通道編碼策略,使其能自動因應環境需要選擇適當的通道編碼,例如當環境嚴苛時因為資料錯誤率高,系統便可為其配置改錯能力較高的編碼,而當環境條件並不嚴苛時便可為之配置較簡易的通道編碼,如此一來對於計算能力不高的行動通訊而言,無疑減輕通訊所需花費在通道編碼複雜運算的電力,這對行動通訊的省電能力而言是相當重要的課題,也可同時滿足通道編碼效能與計算時間間的取決,本文執行的主要目的,便是提出一個能自動因應環境的改變而選出最適當的通道編碼。
The improvement of the Internet’s capacity and its QoS (Quality of Service) has become a very important problem, since the highly development and popular of the Internet. In order to transfer huge of information, we have to make full use of the Internet’s capacity that has already exist, besides adding the Internet’s capacity. Channel coding in a network communication system could solve this question. Because there are several of channel codes, each has their own advantage and disadvantage. Choosing a channel code has became a trade off between effective and reliable. The purpose of this paper is to provide a strategy of channel code selection that will automatically select a right channel code for current channel status. For example, if the noise of a communication is higher then before, then the new system will automatically chose a complex channel code with high performance. In the other way, if the noise of a communication is lower then before, then the strategy will automatically chose a simple channel code. To simplify a channel code will be very useful for a mobile device with poor ability of calculation. And the strategy can also satisfy both the performance of a channel code and saving time in calculation. To provide an automatic selection channel code is the purpose of this paper.
目錄
摘要
Abstract
第一章 序論 1
第二章 原理介紹 5
2.1. OSI分層 5
2.2. 網路服務 7
2.3. ECC 13
2.4. 通道編碼 24
2.5. 國內外的發展情況 40
第三章 研究方法與實作 43
3.1 前言 43
3.2 研究方法 44
3.2.1 偵測通道環境BER值 45
3.2.2 通道編碼選擇公式 48
3.2.3 交換初始控制訊息 52
3.2.4 多套通道編碼選擇架構 53
3.2.5 單一編碼內編碼碼率選擇 54
3.3平台介紹 56
第四章 實驗數據分析與討論 57
4.1單一通道編碼 57
4.2 多種編碼碼率選擇架構 60
4.3多套通道編碼選擇架構 64
4.4各架構系統運算時間與比較 67
第五章 結論 71
第六章 參考文獻 73
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