臺灣博碩士論文加值系統

分碼多工擷取技術(CDMA)被廣泛應用於光纖主幹網路和無線通訊系統中,在無線通訊系統中是使用Gold,Walsh作為展頻碼,在光纖主幹網路使用質數碼作為展頻碼,質數碼與Gold,Walsh最大不同在於無正負位準,因為本論文針對光交換器設計,所以使用質數碼,在許多文獻中發現質數碼中近似正交之特性,利用此特性作為光電碼域交換器設計依據。同時容納量光電碼域交換器的組成元件有輸入編碼器ˋ轉碼器ˋ輸出解碼器與耦合器,輸入編碼器主要功用在於將輸入資料編碼,轉碼器主要功用在於改變質數碼做為資料路徑交換,輸出解碼器將資料解碼傳送到輸出端。同時容納量光電碼域交換器可作模組化設計。類同步平行質數碼架構為使用碼長度較短之非同步架構結合碼長度較長之同步架構,其使用和非同步和同步質數碼間之延遲時間作為同步質數碼之參考時序,因此不需同步時序而達到近似同步容量,類同步光電碼域交換器的質數碼的使用效能上比同時容納量光電碼域交換器大很多。光電碼域交換器可結合WDM與TDM技術使得架構更為簡化。對於多種資料速度ˋ光電碼域交換器的容量限制與資料碰撞也提出解決方法。

Technique of CDMA is widely applied in wireless local network or fiber-optic communication system. The wireless local network uses Walsh or Gold as spreading code and the fiber-optic communication system utilities prime code as spreading code. Because this thesis studies the optical switch, so we use prime code to design optical switch. The prime code has the simultaneous codes which can be used to design the photonic code division switch.(PCDS).But the prime code can not support large number of simultaneous users. We propose the quasi synchronization parallel prime code to solve the capacity problem. This architecture can support large capacity it can be combined with either PCDS -TDM or PCDS-WDM to simplify architecture.

第一章 簡介 1
1.1 無線通訊系統 1
1.2 光纖主幹網路 3
1.2.1 空間交換 3
1.2.1.1 機械式交換單元 3
1.2.1.2 方向性耦合器 4
1.2.1.3 雙穩態光閘 4
1.2.2 分波交換 5
1.2.3 分時交換 5
1.3 研究目的 6
1.4 論文大綱 7
第二章 同時容納量光電碼域交換器之設計 8
2.1 修正式質數碼 8
2.2 同時容納量質數碼產生方法與證明 9
2.3 光交換器設計概念 10
2.4 同時容納量光電碼域交換器 11
2.4.1 組成元件 11
2.4.1.1 轉碼器 12
2.4.2 同時容納量質數碼的佈置方式 13
2.4.2.1 輸入編碼器 13
2.4.2.2 轉碼器 13
2.4.2.3 輸出解碼器 14
2.4.3 線段連接方式 15
2.5 資料路由 16
2.5.1 一對一路由範例 16
2.5.2 一對多路由範例 17
2.5.2.1 一對多(相同群組)路由範例 17
2.5.2.2 一對多(相異群組)路由範例 17
2.5.3 廣播路由設計範例 18
2.6 模組化光電碼域交換器 18
第三章 類同步光電碼域交換器之設計 31
3.1 類同步平行質數碼 32
3.2 類同步編碼器設計 33
3.3 類同步解碼器設計 34
3.3.1 類同步解碼器延遲時間之計算 35
3.4 類同步質數碼同時傳送產生誤判的因素 36
3.5 同步質數碼的選取方式 39
3.6 類同步光電碼域交換器 41
3.6.1 組成元件 41
3.6.1.1 類同步轉碼器 42
3.6.2 類同步平行質數碼的佈置方式 43
3.6.2.1 輸入部分 43
3.6.2.2 交換部分 43
3.6.2.3 輸出部分 44
3.6.3 線段連接方式 44
第四章 光電碼域交換器之分析與
改良結構之探討 54
4.1 WDM+光電碼域交換器與TDM+
光電碼域交換器之概論 54
4.1.1 WDM+同時容納量光電碼域交換器 55
4.1.2 WDM+類同步光電碼域交換器 55
4.1.3 改良型類同步光電碼域交換器 56
4.1.4 TDM+同時容納量光電碼域交換器 56
4.1 TDM+類同步光電碼域交換器 56
4.2 光電碼域交換器之分析 56
4.2.1 線段數目 57
4.2.2 碼的使用率 57
4.2.3 波長的使用率 58
4.2.4 元件數目 58
4.2.5 輸出端解碼函數數目 59
第五章結論與未來研究 69
5.1 結論 69
5.2 不同資料傳送速度的處理方法 70
5.3 光電碼域交換器的容量限制與
星狀耦合器的分散損失(Splitting Loss)
的解決方法 71
參考文獻
具體研究成果

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