Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7852
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dc.contributor.advisor翁芳標zh_TW
dc.contributor.advisorFang-Biau Uengen_US
dc.contributor.author楊佳諭zh_TW
dc.contributor.authorYang, Jia-Yuen_US
dc.date2004zh_TW
dc.date.accessioned2014-06-06T06:40:39Z-
dc.date.available2014-06-06T06:40:39Z-
dc.identifier.urihttp://hdl.handle.net/11455/7852-
dc.description.abstract在分碼多工多使用者存取的通訊系統之中,訊符間干擾(Intersymbol interference)及多重存取干擾(Multiple-access interference)均是非常重要的議題。在多重使用者分碼多工的行動通訊系統中,因為時變性多重路徑的通道會造成嚴重的干擾。傳統的濾波器必須作出適當的改良來克服多路徑所造成的衰減,本篇論文提出六種適應性濾波器的架構來解決上述的問題,我們將最小均方差(Least Mean Square)、遞迴式最小均方差(Recursive least square)和正交化最小均方差(Normalized Least Mean Square )三種演算法,分別套用在有限脈衝響應(Finite Impulse Response)和無限脈衝響應(Infinite Impulse Response)的架構上,模擬的結果顯示,最小均方差、遞迴式最小均方差兩種演算法,相較於傳統的接收器而言可以得到較佳的效能,而正交化最小均方差演算法,則可以使我們所提出之濾波器其步階變數(step-size)擁有較好穩定度,此外均方差 (Mean Square Error)以及收斂值的分析,還有關於正交化最小均方差演算法其步階變數穩定之分析也包含在此篇論文中。zh_TW
dc.description.abstractIn direct-sequence code division multiple access (DS/CDMA) multiuser communication systems with multipath channels, both intersymbol interference (ISI) and multiple-access interference (MAI) must be considered. The multipath effect usually change the characteristics of the spreading codes. Modification of the conventional receiver structure is needed to account for the interference of the multipath fading. This paper proposes six adaptive receivers to solve the above-mentioned problems . We use Least Mean Square (LMS) , Recursive Least Squares (RLS) algorithms and Normalized- Least Mean Square (Normalized-LMS) on both finite impulse response (FIR) and infinite impulse response (IIR) receiver structures. Mean square error , convergence analysis , and analysis for the step-size of Normalized-LMS algorithm are also given in this paper.en_US
dc.description.tableofcontentsChinese Abstract i English Abstract ii Acknowledgments iii Contents iv List of Figures vii List of Tables ix Chapter 1: Introduction 1 1.1 LMS and RLS Adaptive Receivers 1 1.2 Normalized-LMS Receivers 3 Chapter 2: LMS and RLS Adaptive Receivers for DS/CDMA Multiuser Communication system 7 2.1 Multiuser CDMA Communication System 7 2.2 LMS FIR-Type Receiver 8 2.2.1 Structure of LMS FIR-Type Receiver 8 2.2.2 Steady State MSE Comparison 10 2.3 LMS IIR-Type Receiver 11 2.4 RLS FIR-Type Receiver 15 2.5 RLS IIR-Type Receiver 17 2.6 Simulation Results 19 Chapter 3: Normalized-LMS Receivers for DS/CDMA Multiuser Communications system 30 3.1 Normalized-LMS FIR Type Receiver 30 3.1.1 Structure of Normalized-LMS FIR Type Receiver 30 3.1.2 Range of step-size for proposed FIR-type receiver 34 3.1.3 Mean Square Error (MSE) Analysis 36 3.2 Normalized-LMS IIR Type Receiver 39 3.2.1 Structure of Normalized-LMS IIR Type Receiver 39 3.2.2 Range of step-size for proposed IIR-type receiver 45 3.2.3 Mean Square Error (MSE) Analysis 47 3.3 Simulation Results 49 Chapter 4: Conclusions 59 4.1 LMS and RLS Receivers 59 4.2 Normalized-LMS Receivers 59 Bibliography 61en_US
dc.language.isoen_USzh_TW
dc.publisher電機工程學系zh_TW
dc.subjectCDMAen_US
dc.subject分碼多工zh_TW
dc.subjectISIen_US
dc.subjectMAIen_US
dc.subjectLMSen_US
dc.subjectRLSen_US
dc.subjectNormalized-LMSen_US
dc.subject訊符間干擾zh_TW
dc.subject多重存取干擾zh_TW
dc.subject最小均方差zh_TW
dc.subject遞迴式最小均方差zh_TW
dc.subject正交化最小均方差zh_TW
dc.title直接序列展頻分碼多工多使用者通訊系統中之適應性濾波器在多路徑衰減通道之應用zh_TW
dc.titleAdaptive Receivers for DS/CDMA Multiuser Communication in Multipath Fading Channelsen_US
dc.typeThesis and Dissertationzh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
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