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研究生:陳思樺
研究生(外文):Su-Hua Chen
論文名稱:多用戶MIMO感知無線電中繼站系統下預編碼演算技術之干擾消除與提升自身多樣增益
論文名稱(外文):Multiuser MIMO Precoding Technology Design with Interference Cancellation and Enhanced Diversity Gain for Cognitive Radio Relay Systems
指導教授:鄧俊宏
指導教授(外文):Juinn-Horng Deng
口試委員:李大嵩馬杰古孟霖
口試委員(外文):Ta-Sung LeeJeich MarMeng-Lin Ku
口試日期:2016-07-11
學位類別:碩士
校院名稱:元智大學
系所名稱:通訊工程學系
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:2016
畢業學年度:104
語文別:中文
論文頁數:72
中文關鍵詞:多用戶多輸入多輸出重疊式中繼站感知無線電預編碼技術設計干擾消除提升多樣增益
外文關鍵詞:multiuser MIMOoverlay Relaycognitive radioprecoding technology designinterference cancellationenhanced diversity gain
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本論文為研究中繼站(Relay Station, RS)系統之效益,多用戶(Multi User, MU)多天線感知無線電(Cognitive Radio, CR)系統為近年來相當熱門之研究議題,當無執照之感知用戶群(Cognitive Users, CU)與持有執照之主要用戶(Primary Users, PU)使用相同頻帶時,除了會影響主要用戶傳輸之性能外,感知用戶群之傳輸效益也會大幅降低,傳統之多用戶多天線感知系統透過預處理機制來限制傳輸至主要用戶之干擾量,已達成感知用戶不干擾主要用戶之協定,並將主要用戶所造成之干擾影響白雜訊化,然而干擾白雜訊化將造成感知用戶系統傳輸效益大幅降低,本論文提出一個合作式多用戶多天線感知無線電中繼系統,透過中繼站來消除主要用戶所帶來之干擾,大幅提升系統傳輸品質;除了提出上述的利用感知中繼系統消除主要用戶干擾外,更進一步的本論文利用感知中繼系統同時消除主要用戶干擾與提升感知用戶品質,獲得由中繼系統提供的多樣增益性能,本論文為利用預編碼設計達成感知用戶,除了不受主要用戶干擾外,亦能同時獲得感知中繼系統之合作通訊的助益。最後經由電腦模擬證實本論文所提出之合作式多用戶多天線感知無線電中繼系統可以獲得較好的總傳輸率(Sum Rate)。
The thesis studies the benefit of relay station. Multiuser MIMO Cognitive Radio (CR) system is the popular research topic. Moreover, in the overlay system with the unlicensed CR users (CU) and the licensed primary users (PU), PU performance will be degraded by interferences. Similarly, CU transmission efficiency will be reduced by PU interferences. For the traditional multiuser MIMO system, the precoding schemes are utilized to limit the CU transmission power, which can reach the no interference to PU. However, the PU signal will induce the interference to CU. In many research papers, the PU interference signals always are considered as white noise to study the CR performance. In this thesis, a cooperative multiuser MIMO CR relay system is proposed and the relay station is used to cancel the PU interference, which can enhance the transmission quality of CR system. Besides the PU interference cancellation scheme, the precoding design is proposed to acquire the both benefits, i.e., PU interference cancellation and relay station diversity gain. Finally, the simulation results confirm that the link quality of CU system is enhanced and the sum rate of the overall system is improved in the next generation overlay system.
摘要 i
ABSTRACT ii
誌謝 iv
目錄 vi
圖目錄 viii
表目錄 x
縮寫詞彙表 xi
數學符號 xiii
第一章 前言 1
1.1 研究動機與背景 1
1.2 論文架構 4
第二章 多用戶多天線預編碼之感知無線電中繼站系統設計 6
2.1 前言 6
2.2 多用戶多天線預編碼設計 7
2.2.1 多用戶多天線系統 7
2.2.2 預編碼設計 8
2.3 合作式中繼站系統 15
2.3.1 放大轉送中繼站 16
2.3.2 決策轉送中繼站 17
2.3.3 編碼協作中繼站 18
2.4 感知無線電系統 20
2.4.1 交織式感知無線電 20
2.4.2 隱藏式感知無線電 21
2.4.3 重疊式感知無線電 23
第三章 運用感知中繼系統消除主要用戶對共存的感知用戶干擾研究 25
3.1 緒論 25
3.2 感知無線電中繼系統架構圖 26
3.3 新型抗主要用戶干擾結構 29
3.4 感知系統預編碼設計 31
3.4.1 位於1st time slot之訊號預編碼演算法 31
3.4.2 位於2nd time slot之訊號預編碼演算法 32
3.4.3 最終接收訊號及系統效能 34
3.5 電腦模擬結果 37
3.6 總結 46
第四章 消除主要用戶干擾與提昇感知用戶多樣增益性能 47
4.1 緒論 47
4.2 感知無線電中繼干擾消除與提升自身增益系統架構圖 48
4.3 新型抗主要用戶干擾與提昇感知用戶多樣增益之訊框結構 49
4.4 全系統預編碼設計 51
4.4.1 位於1st time slot之訊號預編碼演算法 51
4.4.2 位於2nd time slot之訊號預編碼演算法 54
4.4.3 最終接收訊號及系統效能 57
4.5 電腦模擬結果 60
4.6 總結 67
第五章 結論 68
參考文獻 70


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