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系統識別號 U0002-1606200700315900
中文論文名稱 人數分佈與環境材質對超寬頻通訊系統效能之研究
英文論文名稱 UWB Communication Characteristics for Different Distribution of People and Various Materials of Walls
校院名稱 淡江大學
系所名稱(中) 電機工程學系碩士班
系所名稱(英) Department of Electrical Engineering
學年度 95
學期 2
出版年 96
研究生中文姓名 賀敏慧
研究生英文姓名 Min-Hui Ho
學號 694350082
學位類別 碩士
語文別 中文
口試日期 2007-06-06
論文頁數 71頁
口試委員 指導教授-丘建青
委員-丘建青
委員-林丁丙
委員-李慶烈
委員-余金郎
委員-陳富強
中文關鍵字 超寬頻  多路徑  二進制的脈波振幅調變  位元錯誤率  失效率  均方根延遲擴散 
英文關鍵字 Ultra-wide band  Multi-path  Binary pulse amplitude modulation  Bit error rate  Outage probability  RMS delay spread 
學科別分類 學科別應用科學電機及電子
中文摘要 本論文之研究目的,在於利用射線彈跳法去模擬,求得超頻寬通訊在不同人數分佈和六種不同環境材質的脈衝響應,這六種不同材質邊牆分別為:1.木板牆2.混擬土3. 夾板4.磚頭5.大理石6.鐵皮屋。透過這些多路徑通道的脈衝響應,使用二進制的脈波振幅調變(Binary Pulse Amplitude Modulation, BPAM)方法,進而計算超寬頻通訊系統的位元錯誤率(Bit Error Rate,BER)。我們可以從數值結果得知人數分佈與環境材質其多路徑對於通訊位元錯誤率性能的影響。
在本篇論文中所比較的通道特性參數,包含有均方根延遲擴散(RMS delay spread)、平均超額延遲擴散(mean excess delay spread)、最大的脈衝響應差值小於10dB的個數(NP10dB)與占總能量85%的脈衝個數(NP85)及位元錯誤率。由於無線電波在室內環境中容易受到遮蔽物的影響,這些遮蔽物例如:牆壁、天花板以及傢俱等,使得無線電波經由多重反射、繞射等路徑而到達接收天線,此一現象稱之為多路徑效應(multi-path effect)。由於此效應造成的符際間干擾(InterSymbol Inference,ISI),使得通訊位元錯誤率及失效率(outage probability)增加,亦即通話品質變差。在這篇論文裡,我們將探討室內的人數分佈與環境材質在超寬頻通訊上對位元錯誤率的影響。最後,我們發現到目前這些模擬的情形不僅提供了比較的資訊,且更提供了性能減少這值得關注的訊息。
英文摘要 A comparison of UWB communication characteristics for different distribution of people and various materials of walls in real environments are investigated. The impulse responses of these cases are computed by applying shooting and bouncing ray/image (SBR/Image) techniques and inverse Fourier transform. The frequency dependence utilized in the structure on the indoor channel is accounted for in the channel calculation. By using the impulse response of these multi-path channels, the mean excess delay, root mean square (RMS) delay spread, and the number of multi-path arrivals within 10 dB of the peak multi-path arrival (NP10dB), and the number of paths required to meet the 85% energy capture threshold (NP(85%)) for these different distribution of people and various materials of walls have been obtained. The bit error rate (BER) performance for UWB indoor communication is calculated. The outage probability for binary antipodal-pulse amplitude modulation (B-PAM) system has been presented. Numerical results have shown that the multi-path effect by people is an important factor for BER performance. Finally, it is worth noting that in these cases the present work provides not only comparative information but also quantitative information on the performance reduction.
論文目次 目錄
第一章 概論 …………………………………………………………… P.01
1.1 研究背景 …………………………………………………………… P.01
1.2 研究動機 …………………………………………………………… P.04
1.3 研究內容簡介 ……………………………………………………… P.07

第二章 傳輸通道系統描述 …………………………………………… P.08
2.1 無線電波傳播通道分析 …………………………………………… P.08
2.2 通道計算模型分析 ………………………………………………… P.10
2.2.1 利用射線追蹤法計算出頻域響應 ……………………………… P.10
2.2.2 利用何米特法與快速反傅立葉轉換計算出時域響應 ………… P.15
2.3 射線彈跳追蹤法程式流程分析 ……………………………………P.18
2.4 系統模擬架構 ……………………………………………………… P.22
2.4.1 發射訊號波形 …………………………………………………… P.22
2.4.2 位元錯誤率之計算 ……………………………………………… P.24

第三章 模擬數值結果 ………………………………………………… P.27
3.1 模擬實驗環境 ……………………………………………………… P.27
3.2 模擬結果分析與比較 ……………………………………………… P.29
3.2.1 不同人數分佈 …………………………………………………… P.29
3.2.2 不同材質邊牆 …………………………………………………… P.40

第四章 結論 …………………………………………………………… P.52
參考文獻 ………………………………………………………………… P.55
附錄 ……………………………………………………………………… P.59


圖目錄
圖 2.1:求得通道脈衝響應的步驟 …………………………………… P.14
圖 2.2:何米特程序的信號處理步驟與快速反傅立葉轉換過程 …… P.16
圖 2.3:信號經過何米特程序與快速反傅立葉轉換處理後之結果 … P.17
圖 2.4:SBR/Image 程式流程圖 ……………………………………… P.21
圖 2.5:二位元脈衝振幅調變位元錯誤率系統架構圖 ……………… P.22
圖 2.6:傳送高斯二次微分脈波的波型 ……………………………… P.23
圖 2.7:FCC對室內及室外超寬頻系統的頻段及輻射能量限制 …… P.24
圖 3.1:室內環境平面圖 ……………………………………………… P.28
圖 3.2 (a):室內走道於Rx1(1,1,1)m之脈衝響應(無人) …………… P.33
圖 3.2 (b):室內走道於Rx1(1,1,1)m之脈衝響應(4人) ……………… P.34
圖 3.2 (c):室內走道於Rx1(1,1,1)m之脈衝響應(12人) …………… P.35
圖 3.2 (d):室內走道於Rx1(1,1,1)m之脈衝響應(36人) …………… P.36
圖 3.3:四種不同人數的均方根延遲擴散累積分佈圖 ……………… P.37
圖 3.4:四種不同人數其位元錯誤率比較圖 ………………………… P.38
圖 3.5:四種不同人數其失效率比較圖 ……………………………… P.39
圖 3.6 (a):室內走道於Rx1(1,1,1)m之脈衝響應(木板牆) ………… P.43
圖 3.6 (b):室內走道於Rx1(1,1,1)m之脈衝響應(混擬土) ………… P.44
圖 3.6 (c):室內走道於Rx1(1,1,1)m之脈衝響應(夾板) …………… P.45
圖 3.6 (d):室內走道於Rx1(1,1,1)m之脈衝響應(磚頭) …………… P.46
圖 3.6 (e):室內走道於Rx1(1,1,1)m之脈衝響應(大理石) ………… P.47
圖 3.6 (f):室內走道於Rx1(1,1,1)m之脈衝響應(鐵皮屋) ………… P.48
圖 3.7:六種不同材質邊牆的均方根延遲擴散累積分佈圖 ………… P.49
圖 3.8:六種不同材質邊牆其位元錯誤率比較圖 …………………… P.50
圖 3.9:六種不同材質邊牆其失效率比較圖 ………………………… P.51



表目錄
表 3.1:四種不同人數在超寬頻通訊下的通道參數一覽表 ………… P.37
表 3.2:六種不同材質邊牆在超寬頻通訊下的通道參數一覽表 …… P.49
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