近來無線網路的興起，在新的無線網路規格IEEE802.16，亦被稱為全球微波存取互通性（WiMAX），針對無線大都會網路（WMAN）設計，強調即時性的服務，且對於頻寬和服務品質（QoS）的保證要求，本論文以軟體模擬單一通道下系統容量，並基於802.16-2004的規格下正交分頻多工（OFDM）的半雙工（TDD）系統，以及 802.16e的正交分頻多重擷取（OFDMA）不同的子通道（subchannel）數，模擬各種服務(Service)組合在訊框基礎和符號基礎的SS容量、封包遺失及緩衝容量的分析，並在最後探討不同頻帶所影響正交分頻多工的使用者數和頻寬的關係。

Rise of wireless network recently. In new wireless network spec IEEE802.16 which is also called WiMAX Design for WMAN . It emphasize the realtime service and assurance to bandwidth and QoS is required . This thesis simulation  system capacity under the single chennel . which based on spec 802.16-2004 based OFDM TDD system . And  different subchannel number of OFDMA based 802.16e . We simulation any kinds of Service of  frame based and symbol based effect system capacity and analysis packet loss and buffer size . And last we propose different spectrum effect system capacity and bandwidth based on OFDM.

章節目錄


第一章：緒論............................................................................................01 
1.1　研究動機與目的	....................................................................01
1.2　無線都會區域網路之發展........................................................02
1.3　 OFDM versus OFDMA系統.................................................03
1.4　各章節提要................................................................................06
第二章：WiMAX規格...........................................................................07
2.1　頻帶分配特性............................................................................07
2.2  系統訊號....................................................................................08
2.3  框架格式....................................................................................12
2.4  調變格式....................................................................................15
2.5  服務品質....................................................................................16
第三章：系統設計....................................................................................18
3.1　系統容量....................................................................................18
3.2　緩衝容量....................................................................................19
第四章:模擬結果.....................................................................................20
4.1　系統容量....................................................................................20
4.2　封包遺失基礎............................................................................41
4.3　緩衝容量....................................................................................45
4.4　不同頻帶和頻寬對容量的影響................................................46
第五章　結綸與未來展望......................................................................47
5.1  結綸.............................................................................................47
5.2　未來展望.....................................................................................48
參考目錄..................................................................................................49
主要著作目錄..........................................................................................51

表目錄
表格2.2.1 OFDM系統參數WCS(n=144/125) ...................................10
表格2.2.2 OFDM符號和訊框關係表..................................................10
表格2.2.3 OFDMA系統參數...............................................................11
表格2.2.4 OFDMA符號和訊框關係表...............................................11
表格2.2.5 OFDM 256點FFT symbol rate...........................................12
表格2.4.1 不同調變和編碼率對SNR需求.........................................16
表格4.1.1 256FFT 10ms訊框不考慮服務品質...................................22
表格4.1.2 256FFT 20ms訊框不考慮服務品質...................................24
表格4.1.3 256FFT 10ms訊框 30SSs 傳輸率.....................................25
表格4.1.4 系統容量在OFDM 256和2048FFT（訊框和符號基礎）...35
表格4.1.5 系統容量在OFDMA 2048FFT 8和16子通道（訊框和符號基礎）....................................................................................................36
表格4.2.1 系統容量基於5%封包遺失在OFDM 256和2048FFT.....43
表格4.2.2 系統容量基於5%封包遺失在OFDMA 2048FFT8和16子通道..........................................................................................................44
表格4.3.1 緩衝容量在OFDM 10ms....................................................45
表格4.3.2 緩衝容量在OFDMA 10ms.................................................45
表格4.4.1 系統容量訊框基礎OFDM 256FFT 10ms MMDS、ETSI、WCS.....................................................................................................46

圖目錄
圖表1.1.1 全球無線網路的發展規格.........................................................02
圖表1.3.1 FDM（a）與OFDM（b）表示圖....................................................04
圖表1.3.2 整數週期弦波.............................................................................05
圖表1.3.3 TDM、OFDM、OFDMA..............................................................06
圖表2.3.1 TDD和FDD示意圖...................................................................13
圖表2.3.2 TDD OFDM訊框架構...............................................................14
圖表2.3.3 TDD OFDMA訊框架構............................................................15
圖表2.4.1 星座圖 BPSK、QPSK、16QAM、64QAM..................................16
圖表3.2 緩衝示意圖....................................................................................19
圖表4.1.1 OFDM 256FFT 10ms訊框 10SSs.............................................20
圖表4.1.2 OFDM 256FFT 10ms訊框 20SSs.............................................21
圖表4.1.3 OFDM 256FFT 10ms訊框 30SSs.............................................21
圖表4.1.4 OFDM 256FFT 20ms訊框 10SSs.............................................22
圖表4.1.5 OFDM 256FFT 20ms訊框 20SSs.............................................23
圖表4.1.6 OFDM 256FFT 20ms訊框 30SSs.............................................23 
圖表4.1.7 OFDM 256FFT 20ms訊框 40SSs.............................................24
圖表4.1.8 256FFT 5ms訊框.......................................................................27
圖表4.1.9 256FFT 8ms訊框.......................................................................27
圖表4.1.10 256FFT 10ms訊框...................................................................28
圖表4.1.11 256FFT 12.5ms訊框.................................................................28
圖表4.1.12 256FFT 20ms訊框...................................................................29
圖表4.1.13 2048FFT 5ms訊框...................................................................29
圖表4.1.14 2048FFT 8ms訊框...................................................................30
圖表4.1.15 2048FFT 10ms訊框.................................................................30
圖表4.1.16 2048FFT 12.5ms訊框..............................................................31
圖表4.1.17 2048FFT 20ms訊框.................................................................31
圖表4.1.18 OFDMA 2048FFT 8subchannel 5ms訊框...............................32
圖表4.1.19 OFDMA 2048FFT 8subchannel 8ms訊框...............................32
圖表4.1.20 OFDMA 2048FFT 8subchannel 10ms訊框.............................33
圖表4.1.21 OFDMA 2048FFT 8subchannel 12.5ms訊框..........................33
圖表4.1.22 OFDMA 2048FFT 8subchannel 20ms訊框.............................34
圖表4.1.23 OFDMA 2048FFT 16subchannel 5ms訊框.............................34
圖表4.1.24 OFDMA 2048FFT 16subchannel 8ms訊框.............................35 
圖表4.1.25 OFDMA 2048FFT 16subchannel 10ms訊框...........................35
圖表4.1.26 OFDMA 2048FFT 16subchannel 12.5ms訊框........................36
圖表4.1.27 OFDMA 2048FFT 16subchannel 20ms訊框...........................36
圖表4.1.28 符號使用率OFDM 256FFT 12.5ms訊框...............................38
圖表4.1.29 符號使用率OFDM 256FFT 20ms訊框..................................38
圖表4.1.30 符號使用率OFDMA 2048FFT 8子通道 12.5ms訊框……..40
圖表4.1.31 符號使用率OFDMA 2048FFT 16子通道 12.5ms訊框……41
圖表4.2.1 封包遺失基礎SS容量在OFDM 256FFT 10ms........................42
圖表4.2.2 封包遺失基礎SS容量在OFDM 2048FFT 10ms......................42
圖表4.2.3 封包遺失基礎SS容量在OFDMA 2048FFT 8子通道 10ms................................................................................................................43
圖表4.2.4 封包遺失基礎SS容量在OFDMA 2048FFT 16子通道 10ms................................................................................................................44

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