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研究生:許君豪
研究生(外文):Shiu Juin Hau
論文名稱:可決定性模擬模式模擬時間及頻率選擇性衰落通道
論文名稱(外文):A deterministic simulation model for time and frequency selective fading channel
指導教授:林丁丙林丁丙引用關係林信標林信標引用關係
指導教授(外文):Ding-Bing LinHsin-Piao Lin
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:電腦通訊與控制研究所
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:2003
畢業學年度:91
語文別:中文
論文頁數:74
中文關鍵詞:正交分頻多工時間選擇性衰落頻率選擇性衰落
外文關鍵詞:Orthogonal Frequency Division Multiplexing(OFDM)Time selective fadingFrequency selective fading
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對於電波傳播通道的研究與模式化,是分析與評估無線通訊系統不可或缺的工作,針對此重要需求,本論文主要探討如何利用弦波相加法,亦即利用有限個不同權重、不同都卜勒頻率(或傳播延遲時間)及隨機相位之弦波,組成彩色高斯隨機程序,使其符合實際通道有關時間選擇性或頻率選擇性之統計特性。此外,本論文亦將利用查表技術建構無線通道高速模擬模式,提昇通道模擬器之模擬效率。最後,利用查表技術之高速模擬器所產生的頻率選擇性衰落訊號,使用正交分頻多工的技術探討在不同環境參數下之效能。

The research and simulation modeling on wireless fading channel is very important to analyze and evaluate the performance for mobile communication. For this important need, this thesis concerns how to use sum of sinusoids, which how different magnitude, different Doppler frequency (or excess delay time) and random phase, to synthesis a color Gaussian random process. The simulated fading channel needs to meet the statistical properties about the time selective and frequency selective fading channel. Furthermore, the table look up technique will be used to develop a wireless high-speed channel simulation modeling for increasing the simulation efficiency. Finally, the high -speed simulated fading channel for frequency selective statistics is used to evaluate the performance of OFDM system under the different environment parameters.

第一章 緒論 1
1.1前言 1
1.2研究目的及動機 1
1.3章節介紹 3
第二章 無線通道統計特性 5
2.1衰落種類 5
2.1.1 路徑損失 6
2.1.2 慢速衰落 6
2.1.3 快速衰落 7
2.2系統頻寬與通道 9
2.3時變寬頻通道 11
第三章 通道模型與模擬方法 14
3.1時間選擇性衰落通道模型 14
3.2頻率選擇性衰落通道模型 16
3.3時間選擇性衰落通道模擬方法 19
3.4頻率選擇性衰落通道模擬方法 21
第四章 萃取時間選擇性衰落通道之參數 24
4.1相等距離法(Equal distance method) 24
4.2均方根誤差法(Mean square error method) 25
4.3相等面積法(Equal area method) 26
4.4蒙地卡羅法(Monte Carlo method) 27
4.5精確都卜勒擴展法(Exact Doppler spread method) 29
4.6模擬結果 42
第五章 萃取頻率選擇性衰落通道之參數 38
5.1相等延遲法(Equal delay method) 39
5.2均方根誤差法(Mean square error method) 39
5.3相等功率法(Equal power method) 41
5.4蒙地卡羅法(Monte Carlo method) 42
5.5模擬結果 42
第六章 快速通道模擬器 51
6.1時間選擇性衰落通道之查表示通道模擬器 51
6.2窄頻系統效能分析 56
6.3頻率選擇性衰落通道之查表示通道模擬器 58
6.4正交分頻多工效能分析 67
第七章 結論 70
參考文獻 74

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