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研究生： 紀信旭
hsin-hsu Chi
論文名稱： 應用於3GPP WCDMA-FDD上傳鏈路系統的遞迴最小平方波束合成犛耙式接收機
Rake Receivers Using RLS-like Adaptive Filtering for 3GPP WCDMA-FDD Uplink
指導教授： 陳永芳
Yungfang Chen
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 通訊工程學系
Department of Communication Engineering
畢業學年度： 90
語文別： 中文
論文頁數： 76
中文關鍵詞： 智慧型天線 、最小遞迴平方 、波束合成 、犁耙式接收機
外文關鍵詞： smart antenna, RLS, beamforming, RAKE receiver
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    • 隨著第三代行動電話在台灣的使用執照發出，第三代行動電話的競爭將進入戰國時代，第三代行動電話提供各式各樣的服務，為提供更好的服務品質，發展更好的技術是必要的。本論文針對第三代行動電話系統中的3GPP（Third Generation Partnership Project）寬頻分碼多重進接—分頻多工上傳鏈路系統提供智慧型天線調適性演算法，此演算法建構於現有一維犛耙式接收器上，並不需更改現有一維犛耙式接收器架構，而實現相當於二維犛耙式接收器概念之處理架構。
    在論文中利用類似遞迴最小平方(RLS Like)調適性演算法，並使用最大比值合併法來合併不同路徑的訊號，以達成二維犛耙式接收器的概念。此接收器的運算複雜度比使用二維犁耙式接收機的運算複雜度低，並可用於解決〝遠近問題〞及〝抗干擾〞等問題，並能讓手機使用者減少輸出功率，因此進而減少分碼多重進接各使用者之間互相干擾，進而增加系統容量及加大覆蓋面積。

    In the future, mobile communications do not only provide one kind of service. They provide many kinds of service such as voice, video, data …etc. In order to provide variable service, it must to develop new technology can provide better quality. In this paper, we present a smart antenna adaptive processing structure for the 2-D RAKE receiver design built on top of the current existent 1-D RAKE receiver. This method can be applied to the 3GPP WCDMA communication systems.
    In this paper, we use the RLS-like (Recursive Lease Square-like) adaptive filter algorithm and the MRC (Maximum Ratio Combining) method to achieve the concept of 2-D RAKE processing structure. The processing structure can be used to combat the “Near-Far” problem and offer the “Interference-Resistant” property. By adopting this method, we can obtain the following advantages: 1. To decrease the transmit power to reduce mutual interference between users. 2. To increase the system capacity and coverage.

    中文摘要...............................................I 英文摘要...............................................II 目錄...................................................III 圖目...................................................V 表目...................................................X 第一章 緒論............................................1 1.1研究背景與動機......................................1 1.2論文架構............................................3 第二章 3GPP寬頻分碼多重進接-分頻多工上傳鏈路系統架構...4 2.1 上傳鏈路實體通道（uplink physical channel）........4 2.1.1 專用實體通道（dedicated physical channel）.......5 2.1.2 共用實體通道（common physical channel）..........10 2.2 展頻和調變.........................................11 2.2.1 展頻碼和攪亂碼...................................12 2.2.1.1 展頻碼.........................................12 2.2.1.2 攪亂碼.........................................15 2.2.2 調變.............................................18 2.3 訊號模型...........................................19 第三章 常見空間上的濾波：波束合成......................21 3.1 天線陣列系統.......................................21 3.2 傳統的波束合成.....................................25 3.3 最佳波束合成.......................................28 3.4 適應性波束合成.....................................31 第四章 波束合成在3GPP寬頻分碼多重進接-分頻多工上傳鏈路 系統的應用.............................................34 4.1 波束合成在直接展頻分碼多重進接行動通訊系統應用.....34 4.2 3GPP寬頻分碼多重進接-分頻多工上傳鏈路系統的犁耙式 接收機.................................................38 4.2.1 接收機架構.......................................38 4.2.2 匹配濾波器.......................................41 4.2.3 權重產生及波束合成...............................43 4.2.4 最大比值合併法...................................46 第五章 模擬與討論......................................51 5.1 模擬細節...........................................51 5.2 星象圖.............................................54 5.3 輸出訊雜比.........................................62 5.4 波束樣形...........................................70 第六章 結論............................................74 參考文獻...............................................75


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