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研究生:徐卿生
研究生(外文):Ching-Sheng Hsu
論文名稱:二級群組序列式干擾消除檢測器在寬頻分碼多工存取系統之研究
論文名稱(外文):A Two-Stage Groupwise Successive Interference Cancellation Sheme For WCDMA System
指導教授:劉宗憲劉宗憲引用關係
指導教授(外文):Tsung-Hsien Liu
學位類別:碩士
校院名稱:國立中正大學
系所名稱:通訊工程研究所
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:2001
畢業學年度:89
語文別:中文
論文頁數:56
中文關鍵詞:多用戶檢測干擾消除群組序列式干擾消除檢測器多變速率
外文關鍵詞:Multiuser DetectionInterference CancellationGroupwise Successive Interference CancellationMultirate
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對於多變速率(multirate)的寬頻分碼多工存取系統(wideband code division multiple access, WCDMA),我們提出新的二級群組序列式干擾消除檢測器(groupwise successive interference cancellation, GSIC). 在我們所提出的GSIC檢測器,使用相同傳輸速率傳輸的用戶被劃分為相同的群體,然後再經過匹配濾波器(match filter)取樣作處理.在第一級,在群與群之中我們使用序列式干擾削除法(successive interference ancellation, SIC);但是在第二級中,我們卻以序列式干擾削除法和平行式干削除法(parallel interference cancellation, PIC)混合法來達到更有效率的干擾消除.在有多重路徑衰減通道下,我們使用了犁靶式接收機(RAKE receiver)來對抗此衰減通道.我們使用位元錯誤機率(bit error probability, BER),來比較基本型(basic)GSIC,延伸型(extended)GSIC和我們所提出的GSIC這三種檢測器分別在非同步高斯通道(asynchronous AWGN)與雷烈頻率選擇性通道 (Rayleigh frequency-selective channel)的環境下.模擬的結果顯示出我們所提出的修正型(modified)GSIC,在所有的群組中,其效能皆比基本型GSIC還佳;且除了第一個群組外,其他的群組的效能也都比延伸型GSIC還佳.但是我們所提出的檢測器卻必須需要更多的檢測延遲來完成.由於之前所有的參數我們都假設已知,所以最後我們利用最小平方差(least-squares)估計法則,來估計一些參數,以符合實際的狀況.我們利用WCDMA在控制通道上的pilot bits資訊來輔助我們完成最小平方差估計,而有結果顯示在使用64個pilotbits估計所得到的效果最理想.

第一章 導論.................................................1
1.1] 問題描述.............................................1
1.1.1 Multiple Access...................................1
1.1.2 第三代無線通訊....................................3
1.1.3 文獻回顧..........................................4
1.2 動機..................................................5
1.3 論文組機..............................................8
第二章 訊號模組.............................................9
2.1 WCDMA概述.............................................9
2.1.1 架框架構..............................................9
2.1.2 展頻法則..........................................10
2.1.3 通道碼的產生與指定................................10
2.1.4 擾亂碼的產生與指定................................13
2.2 通訊通道..............................................15
2.3 等效機頻架構..........................................17
2.4 等效離散時間架構......................................21
第三章 群組序列式干擾消除檢測器.............................24
3.1 基本型群組序列式干擾消除檢測器(Basic SIC).............24
3.2 延伸型群組序列式干擾消除檢測器(Extended GSIC).........27
3.3 修正型群組序列式干擾消除檢測器(Modified GSIC).........28
3.4 模擬與結果............................................30
第四章 使用最小平方差估計法則之群組序列式干擾消除檢測器.....35
4.1] 最小平方差估計法則...................................35
4.2] 模擬與結果...........................................43
第五章 結論.................................................48
Reference...................................................50
中英文名詞對照表............................................54

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