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研究生:陳長新
研究生(外文):Chang-Hsin Chen
論文名稱:IEEE802.16a無線都會網路傳收機設計與效能評估
論文名稱(外文):IEEE 802.16a Transceiver Design and its Performance Evaluation
指導教授:沈文和
指導教授(外文):Wern-Ho Sheen
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電信工程系所
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:2004
畢業學年度:92
語文別:中文
論文頁數:83
中文關鍵詞:無線都會網路載波頻率偏移估算保護區間長度估算取樣頻率偏移估算通道估測碼框同步
外文關鍵詞:Wireless-MANFrequency Offset EstimationCyclic Prefix EstimationClock Offset EstimationChannel EstimationFrame Synchronization
相關次數:
  • 被引用被引用:1
  • 點閱點閱:213
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:1
正交分頻多工(Orthogonal Frequency Division Multiplexing,OFDM)已被認為是實現未來高速資料傳輸的重要技術;並且,它也成功地被廣泛使用在多種應用領域。本論文在IEEE 802.16a無線都會網路OFDM Mode的標準下,發展DL Preamble能量偵測、碼框同步、保護區間長度估測、通道估測、載波頻率偏移估算、取樣頻率偏移估算等的演算法。此外,我們建立了一包含上述所有演算法的IEEE 802.16a無線都會網路OFDM Mode之接收機模擬平台。根據電腦的模擬結果,我們驗證了所提出演算法的可行性。最後,為了符合IEEE 802.16a 無線都會網路OFDM Mode系統的規範,在不損失系統效能的前提下,我們也提出降低演算法實現成本的方法。
Orthogonal frequency division multiplexing (OFDM) is a promising transmission technology for future high data rate communications. It has been successfully used in wide varieties of applications. In this thesis,based on the standard of IEEE 802.16a OFDM Mode, we design the algorithms for the detection of DL Preamble energy, frame synchronization, CP estimation, channel estimation, frequency offset estimation and clock offset estimation..In addition, a complete simulation platform, involving all the algorithms mentioned above, is developed for the transceiver that complies with the IEEE 802.16a system specification. According to the simulation results, it is found that all our proposed algorithms are feasible. Finally, in order to satisfy the requirements of specification, we also propose methods to lower the implementation cost without losing the system performance.
目錄……………………………………………………………Ⅲ
圖目錄……………………………………………………… V
表目錄………………………………………………………VII
第一章 簡介……………………………………………………1
第二章 OFDM技術基本原理……………………………………4
2.1 OFDM調變技術介紹………………………………4
2.2 保護區間與載波正交性……………………………8
2.3 結論…………………………………………………11
第三章 IEEE802.16a無線都會網路標準介紹……………13
3.1 無線寬頻接取系統(BWA)簡介…………………………13
3.2 碼框結構………………………………………13
3.3 IEEE802.16a標準架構……………………………23
3.4 模擬結果………………………………………26
第四章 OFDMA系統之通道估測…………………………29
4.1 OFDMA系統之通道估測問題介紹………………29
4.2 OFDMA系統之通道估測方法………………………34
4.2.1 最有可能性通道估測法……………………………36
4.2.2 平滑濾波器…………………………………………42
4.2.3 低複雜度之平滑濾波器………………………………45
4.3 模擬結果…………………………………………………48
第五章 同步問題…………………………………………55
5.1 同步問題介紹………………………………………55
5.2 DL Preamble能量偵測………………………………56
5.3 載波頻率偏移估算方法………………………………57
5.4 碼框同步……………………………………………60
5.5 保護區間長度的估算………………………………61
5.6 碼框同步與載波頻率偏移估算的微調…………………62
5.7 取樣頻率偏移估算方法……………………………63
第六章 所有演算法合併之效能………………………………69
6.1 模擬所使用的演算法…………………………………69
6.2 演算法執行流程……………………………………69
6.3 模擬結果……………………………………………72
6.4 分析討論……………………………………………78
第七章 結論 ………83
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