本論文是探討在無線廣域網路(Wireless Regional Area Network, WRAN) 系統架構下，依照 IEEE 802.22 標準所規範，針對可在此電視頻帶上傳輸的訊號進行認知分析，瞭解頻帶使用狀態。而接收訊號的可能情形為1.雜訊；2.ATSC訊號加雜訊；3.WRAN訊號加雜訊；4.ATSC訊號加WRAN訊號加雜訊。本論文主要重點是提出WRAN系統的訊號認知方法，提出的流程為1.ATSC訊號認知；2. WRAN訊號認知，藉由以上認知方法，產生各種方法的判別結果，決定此通道是否有訊號存在，且為何種訊號存在，藉此了解通道使用狀況。爾後WRAN會利用認知無線電技術，將我們探討出的結論與其他認知資訊 (如通道容量，系統參數等)，決定接下來需調整的頻帶或系統參數等，以持續WRAN訊號的傳輸。

In this thesis, we study the cognitive algorithm in digital television (DTV) bands for Wireless Regional Area Network (WRAN) signals. The WRAN standards are specified by the IEEE 802.22 Working Group. The principle of the proposed algorithm in this thesis is to recognize the band state by analyzing the transmitted signals in DTV bands. The received signals could be 4 possible options: 1.Noise 2.ATSC signal plus noise 3.WRAN signal plus noise 4.ATSC signal plus WRAN signal and noise. This thesis proposed an algorithm to cognize the WRAN signals, and the proposed schedule is 1.Cognitive algorithm for sensing ATSC signal 2.Cognitive algorithm for sensing WRAN signal. According to the result of this schedule, we will get the information of the band status. Later, WRAN will make use of cognitive radio technology we developed in the thesis, together with other cognitive information (such as channel capacity, system parameters, etc.), to sustain the WRAN signal transmission by making some adjustments of system parameters or the required bandwidth.

目錄................................................................................................................................I
摘要..............................................................................................................................III
Abstract.......................................................................................................................IV
誌謝...............................................................................................................................V
圖、表目錄..............................................................................................................VI
變數列表................................................................................................................... VII
縮寫對照表.............................................................................................................. VIII
第一章 導論.................................................................................................................1
1.1 研究動機........................................................................................................1
1.2 背景知識........................................................................................................1
1.2.1 IEEE 802.22 (WRAN) 標準簡介.......................................................1
1.2.2 認知無線電 (Cognitive Radio, CR) 簡介.......................................3
1.3 文獻探討........................................................................................................4
1.4 論文架構........................................................................................................5
第二章 無線廣域網路(WRAN)的頻帶環境..............................................................6
2.1 前言.................................................................................................................6
2.2 WRAN 頻帶利用情況....................................................................................6
2.3 使用數位電視頻帶的訊號............................................................................9
2.3.1 ATSC訊號...........................................................................................9
2.3.2WRAN 訊號........................................................................................14
第三章 無線廣域網路(WRAN)的訊號認知............................................................18
3.1 前言...............................................................................................................18
3.2 接收訊號類型及相對分佈情形..................................................................18
3.3 WRAN 接收端訊號認知流程......................................................................19
3.3.1 ATSC 訊號與WRAN 訊號的循環性...............................................19
3.3.2 循環穩態程序....................................................................................20
3.4 無線廣域網路(WRAN)之訊號認知...........................................................26
3.4.1 整體訊號認知流程...........................................................................26
3.4.2 接收訊號的ATSC 訊號認知分析...................................................28
3.4.3 接收訊號的WRAN 訊號認知分析.................................................43
第四章 結論...............................................................................................................54
附錄A ......................................................................................................................55
附錄B ......................................................................................................................57
附錄C..........................................................................................................................64
參考文獻.....................................................................................................................69

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