畢業設計-基于cdma室內分布系統設計與優化-文庫吧在線文庫

　　

【正文】 近由于缺乏運營利潤可能已經停止 EVDV的開發 , 更可能是因為 Sprint和 Verizon 都在使用 EVDO. CDMA2021 3x CDMA2021 3x 利用一對 MHz 無線信道 (., 3 X MHz)來實現高速數據速率。 1xEVDV 還能支持 1x 語音用戶， 1xRTT 數據用戶和高速 1xEVDV 數據用戶使用同一無線信道并行操作。下面按照復雜度排列： (1) CDMA2021 1x CDMA2021 1x 就是眾所周知的 3G 1X 或者 1xRTT, 它是 3G CDMA2021 技術的核心。但目前使用 CDMA 的地區只有日、韓和 北美 ，所以 CDMA2021 的支持者不如 WCDMA 多。 Design scheme 8 摘 要 ..................................................................................................................................................... 6 Abstract .................................................................................................................................................. 7 第一章 緒 論 ....................................................................................................................................... 10 ............................................................................................................... 10 CDMA的發展歷程 .................................................................................................................... 10 論文結構 ................................................................................................................................ 11 第二章 CDMA 室內分布系統原理及關鍵技術 ......................................................................................... 12 CDMA 基本原理 ....................................................................................................................... 12 ...................................................................................................................... 12 ...................................................................................................................... 12 CDMA 信道 .................................................................................................................... 14 ................................................................................................................... 16 ........................................................................................................ 16 ..................................................................................................... 17 .............................................................................................. 17 ................................................................................................. 17 ................................................................................................................................. 18 .............................................................................................. 18 ..................................................................................................... 19 、切換控制 ............................................................................................................ 19 ........................................................................................................ 19 ...................................................................................................................... 20 .......................................................................................................................... 20 .......................................................................................................................... 21 （ POI） ............................................................................................................. 21 ..................................................................................................... 22 .................................................................................................................................... 23 ............................................................................................................... 23 ............................................................................................................... 23 輸線及饋線技術指標 ................................................................................................. 23 、施工安裝要求 .......................................................................................... 24 ...................................................................................................................... 24 ........................................................................................................ 24 GPS安裝要求 ............................................................................................................... 24 ............................................................................................................... 25 ........................................................................................................ 25 ........................................................................................................ 25 第三章 圖書館的室內信號覆蓋設計方案 ............................................................................................... 26 .......................................................................................................................... 26 ............................................................................................................ 26 ............................................................................................................... 26 ............................................................................................................... 27 室內分布系統設計 .................................................................................................................. 27 ..................................................................................................... 27 ........................................................................................................ 27 9 .................................................................................................................