李學智臺灣大學：電信工程學研究所許正乾Hsu, Cheng-KengCheng-KengHsu2007-11-272018-07-052007-11-272018-07-052007http://ntur.lib.ntu.edu.tw//handle/246246/58762This thesis consists of two parts. The first part concerns the study of transmission effects of indoor wireless communication under different frequency bands for Saleh-Valenzuela model which includes 2.4 GHz and 60 GHz. We will understand indoor channel characteristics by means of channel parameter set {beta0,γ,lamda} for Saleh-Valenzuela model, in which beta0 represents the amplitude difference of the direct path and the start point of the linear regression line of power delay profile, γ represents the slope of the linear regression line, and lamda represents the mean ray arrival rate. We use this model to extract channel parameters which allows us to observe characteristics of all channels such as 60 GHz system in LOS environment and 2.4 GHz system in LOS environment. In addition, we made a study of the effects of field pattern of antennas and human blockage under WLAN for 60 GHz system. In LOS environment, the performance of the received signal at the receiver of directional antenna is better than omni-directional antenna. In spite of human blockage between the transmitter and the receiver, however, the average received power of directional antenna at the receiver is still better than omni-directional antenna. The second part of this thesis involves the measurement of a MIMO system with different antenna polarizations in 2.4 GHz frequency band in indoor environment. In LOS environment, applying co-polarization antenna scheme symmetrically on both ends demonstrates a good received power, but the channel capacity will be poor. On the contrary; using orthogonal polarization antenna scheme on both ends will result in high power isolation at receiver, and the channel capacity will be better.中文摘要 Ⅰ 英文摘要 Ⅱ內容 Ⅲ 圖目錄 Ⅵ 表目錄 Ⅸ 第1章 導論 1 1.1 研究動機 1 1.2 論文架構 2 第2章 室內通道的統計模型 4 2.1 簡介 4 2.2 Saleh-Valenzula通道模型 5 2.2.1 一般Saleh-Valenzula通道模型的描述 5 2.2.2 修正型指數衰減通道模型 7 2.3 參數的萃取 8 2.3.1 環境描述 8 2.3.2 萃取參數的流程 12 2.3.3 設定適當的臨界值 13 2.3.4 如何求出線性迴歸線 15 2.3.5 不同環境量測值的比較 16 2.4 擴散功率及Ricean因數的量測 22 2.4.1 擴散功率的量測 22 2.4.2 Ricean因數 25 2.5 模擬 26 第3章 室內環境無線電波的傳播模式 30 3.1 天線場型及人體阻隔對60GHz系統的影響 30 3.1.1 量測環境 31 3.1.2 實驗設計 31 3.1.3 量測參數 32 3.2 路徑損耗模型 43 3.2.1 路徑損耗模型理論 43 3.2.2 量測結果與驗證 44 第4章 室內MIMO通道量測 50 4.1 簡介 50 4.2 一般描述 51 4.2.1 MIMO通道模型 51 4.2.2 通道容量 53 4.3 MIMO通道量測 55 4.3.1 相關矩陣 55 4.3.2 極化功率矩陣 57 4.3.3 正規化的極化功率矩陣 59 4.4 量測結果與分析 60 4.4.1 實驗裝置 60 4.4.2 量測環境 62 4.4.3 量測數據與分析 63 4.5 天線極化的Ricean因數量測與模擬 75 4.6 模擬 83 第5章 結論 86 參考文獻 882071241 bytesapplication/pdfen-USSaleh-Valenzuela模型60GHz無線區域網路MIMO共面極化通道容量Saleh-Valenzuela model60GHz WLANco-polarizationchannel capacitythesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58762/1/ntu-96-J93921036-1.pdf