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論文名稱 Title |
超寬頻無線通訊系統之波型設計 Waveform Design for UWB Systems |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
367 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2008-07-23 |
繳交日期 Date of Submission |
2008-08-26 |
關鍵字 Keywords |
脈衝設計、超寬頻、高斯脈衝、波型設計 SSGW, Spectrum Shifted Gaussian Waveform, waveform design, SZPI, Shifted Zero Point Insertion, Ultra-Wideband, Shifted Steepest sidelobe roll-off, FCC, SSSR, UWB, Ultra-wide Band, Gaussian Pulse |
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統計 Statistics |
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中文摘要 |
在本篇論文中,主要探討UWB 的波形設計。由於UWB 的功率頻譜限制全世界並無統一標準,在SSGW(Spectrum Shifted Gaussian Waveform)設計法中 我們採用了美規(FCC)、歐規(ECC)和日規JCC)的功率頻譜,而且歐規(ECC)和日規(JCC)還要求需要有DAA(Detect And Avoid)的技術,並且討論傳輸 速率為480 Mbps、240 Mbps 和120 Mbps 的情況。因此我們共設計了15 種脈衝來滿足各種需求。除此之外我們還另外使用了SSSR(Shifted Steepest sidelobe roll-off)設計法和SZPI(Shifted Zero Point Insertion)設計法,討論了在480 Mbps的傳輸速率下,滿足美規(FCC)頻譜規範。 三種設計法有一個共通點,就是頻譜都利用了多個載波疊加而成。該設計方式最大的優勢在於多個頻譜合成的可適性較前人所提出的單一頻譜要佳。 從2005 年IEEE 802.15.3a 解散後,也就意味著UWB 的標準將由市場決定。目前仍有許多國家對UWB 的功率頻譜要求仍未決定,加上UWB 是unlicensed 的傳輸技術,意味著即使現再設計出一個完美滿足FCC 頻譜規範的波形,難保幾年後FCC 不會修改頻譜規範。加上UWB 的傳輸頻寬有12 GHz,如果不加上CR的技術,勢必會干擾到別的無線傳輸系統的信號。 我們提出的三種設計方式,都可以搭配CR 的技術。若CR 的技術成熟,利用我們所提出的設計方式,都可輕易的避開某些頻段達到互不干擾別的無線傳輸系統的信號。 |
Abstract |
none |
目次 Table of Contents |
目錄 中文摘要................................................................................................................ I 誌謝.......................................................................................................................V 圖目錄..................................................................................................................XI 表目錄................................................................................................................XV 變數列表...........................................................................................................XIX 第一章 導論..........................................................................................................1 1.1 UWB的歷史沿革....................................................................................1 1.2 研究動機.................................................................................................1 1.3 文獻探討.................................................................................................3 1.4 背景知識.................................................................................................3 1.4.1 IEEE正式將UWB排入標準.........................................................4 1.4.2 抗干擾技術..................................................................................4 1.4.3 抗雜訊技術..................................................................................5 1.4.4 UWB特性.....................................................................................6 1.4.5 UWB如何定義? .........................................................................6 1.4.6 UWB實現方式的分歧:DS-UWB、MB-OFDM ......................7 1.4.7 Bluetooth也可改用UWB .............................................................8 1.5 論文貢獻以及架構.................................................................................8 第二章 SSGW設計法........................................................................................11 2.1 前言.......................................................................................................11 2.2 SSGW數學模型....................................................................................11 2.3 SSGW設計步驟....................................................................................11 2.3.1 頻譜切割....................................................................................12 2.3.2 高斯脈寬選擇............................................................................13 2.3.3 高斯頻譜中心頻率選擇............................................................13 2.3.4 合成頻譜疊加並調整功率........................................................17 2.4 滿足FCC功率頻譜密度的SSGW設計................................................17 2.4.1 使用2 ns高斯脈衝.....................................................................17 2.4.2 使用4 ns高斯脈衝.....................................................................41 2.4.3 使用8 ns高斯脈衝.....................................................................80 2.4.4 高斯脈寬對FCC頻譜的影響..................................................119 2.5 滿足ECC和JCC功率頻譜密度的SSGW設計...................................120 2.5.1 ECC和JCC功率頻譜介紹和切割............................................121 2.5.2 使用SSGW設計ECC和JCC功率頻譜....................................123 2.5.3 高斯脈寬對ECC和JCC頻譜的影響.......................................127 2.6 SSGW設計法的性能跟特性...........................................................127 2.6.1 頻譜可適性..............................................................................127 2.6.2 功率調整..................................................................................128 第三章 SSSR設計法........................................................................................129 3.1 前言.....................................................................................................129 3.2 SSR數學模型...................................................................................129 3.3 使用SSSR法設計...............................................................................132 3.3.1 頻譜切割..................................................................................132 3.3.2 SSR脈寬選擇...........................................................................133 3.3.3 SSR中心頻率選擇...................................................................133 3.3.4 合成頻譜疊加並調整功率......................................................138 3.4 滿足FCC功率頻譜密度的SSSR設計................................................138 3.4.1 使用2 ns的SSSR脈衝..............................................................138 3.5 SSSR設計法的性能跟特性................................................................159 3.5.1 SSR頻譜功率修正法...............................................................159 3.5.2 SSR頻譜位置修正法...............................................................161 第四章 SZPI設計法.........................................................................................165 4.1前言.......................................................................................................165 4.2 ZPI數學模型........................................................................................165 4.3 使用SZPI法設計................................................................................169 4.3.1 頻譜切割..................................................................................169 4.3.2 ZPI脈寬選擇.............................................................................170 4.3.3 ZPI中心頻率選擇.....................................................................170 4.3.4 合成頻譜疊加並調整功率......................................................172 4.4 滿足FCC功率頻譜密度的SZPI設計.................................................172 4.4.1 使用N+2的SZPI脈衝..............................................................172 4.4.2 使用N+4的SZPI脈衝..............................................................192 4.4.3 使用N+6的SZPI脈衝..............................................................214 第五章 結論與未來工作..................................................................................239 5.1 結論.....................................................................................................239 5.2 未來工作.....................................................................................................241 附錄A SSR時域方程式係數求解.....................................................................243 附錄B N+2的ZPI時域方程式係數求解...........................................................257 附錄C N+4的ZPI時域方程式係數求解...........................................................375 附錄D N+6的ZPI時域方程式係數求解...........................................................301 參考文獻............................................................................................................333 作者簡歷............................................................................................................335 |
參考文獻 References |
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