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研究生:張堂振
研究生(外文):Tang-chen Chang
論文名稱:第三代行動通訊之衰減通道模擬器的研究與實現
論文名稱(外文):The Research and Implementation of the 3G Mobile Communication Fading Channel Simulator
指導教授:翁萬德
指導教授(外文):Wan-De Weng
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電機工程系碩士班
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:2003
畢業學年度:91
語文別:中文
論文頁數:85
中文關鍵詞:Rayleigh衰減通道.都卜勒效應多重路徑衰減通道Jakes模型
外文關鍵詞:multipath fading channelRayleigh fading channelDoppler effect
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通道衰減模擬器為通訊系統在設計與認證上,所不可或缺的一項測試工具,其中Jakes模型由於具備架構簡單、符合電波散射理論並且能夠呈現都卜勒偏移頻率效應等優點,而廣泛的被應用於Rayleigh衰減通道的模擬。在本論文中我們針對無線電波傳播特性及Jakes數學模型進行研究分析,提出我們對該模型所建議的修正模式,使其能在較低的硬體成本要求下,具備產生多重獨立的Rayleigh頻率選擇性衰減信號以及較佳的統計特性。並且實際進行硬體通道模擬器的設計與實現,建構出具備簡便操作、高彈性的模擬參數範圍、通道效應逼真、成本降低等特點之通道模擬器。
Fading channel simulator is one of the most important testing equipments for the design and identification of communication systems. Jake’s model is widely used on the simulation of a Rayleigh fading channel. In this project we focus on the analysis of radio wave propagation characteristics and the performance of the Jakes model. A modified Jakes model with multiple independent Rayleigh frequency-selective fading signals and better statistical characteristics is proposed and realized. The advantages of the proposed channel simulator include easier operation, more flexible parameter choices, more realistic channel effect, and lower cost.
中文摘要 i
英文摘要 ii
誌謝 iii
目 錄 iv
圖 目 錄 vii
表目錄 ix
第一章 緒論 1
1.1研究動機 1
1.2研究目的 2
1.3研究方法與內容 2
1.4各章提要 2
第二章 無線衰減通道特性 3
2.1無線電波傳播特性 3
2.1.1電波傳播方式 3
2.1.2通道衰減因素 4
2.2 多重路徑衰減效應 5
2.2.1 時間延遲擴散 6
2.2.2 都卜勒偏移 7
2.2.3 包封衰減 9
2.3 多重路徑衰減的形式 12
2.4 3GPP傳播條件測試規範 13
第三章 衰減通道模擬器介紹 18
3.1 模擬器系統架構 18
3.2窄頻衰減通道模擬器 20
3.3 Jakes衰減通道模擬器 22
3.3.1 Jakes模擬器數學緣由 22
3.3.2 Jakes模擬器模型架構 27
3.4 寬頻衰減通道模擬器 29
第四章 多重路徑衰減通道模擬器 31
4.1 設計需求 31
4.2信號相關性的改善 32
4.2.1振盪係數正交化法(Product with orthogonal function) 32
4.2.2電波入射角配置法(Arrival angle arrangements) 33
4.2.3 效能分析 35
4.3 模型修正 37
4.4 統計特性 40
第五章 模擬器的實現 44
5.1 架構規劃 44
5.2使用工具介紹 45
5.2.1 TMS320C5x DSP 45
5.2.2 FPGA 49
5.3 Rayleigh衰減信號產生器 52
5.3.1函式分析 52
5.3.2 實現方式 54
5.4 FPGA實現之周邊架構 60
5.4.1 DSP 輸出資料存取介面 60
5.4.2 多重延遲路徑衰減架構 61
5.4.3 白色高斯雜訊產生器 64
第六章 測試與討論 66
6.1硬體限制 66
6.2信號波形 68
6.2.1 測試方式 68
6.2.2 量測結果 68
6.3統計特性 70
6.3.1 測試方式 70
6.3.2 量測結果 73
第七章 結論與展望 75
參 考 文 獻 77
附 錄 一 3GPP TS 25.101 Propagation conditions 80
1 Static propagation condition 80
2 Multi-path fading propagation conditions 80
3 Moving propagation conditions 80
4 Birth-Death propagation conditions 81
附錄二 3GPP TS 25.102 Propagation conditions 83
1. Static propagation condition 83
2 Multi-path fading propagation conditions 83
2.1 3.84 Mcps TDD Option 83
2.2 1.28 Mcps TDD Option 83
簡 歷 85
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