【正文】 .......................................4 多址接入方案 ...............................................................................................................................4 信道編碼方案 ...............................................................................................................................4 調(diào)制和擴頻方案 ...........................................................................................................................4 物理層過程 ...................................................................................................................................4 TDSCDMA 物理信道及傳輸信道 ......................................................................................................5 物理信道 .......................................................................................................................................5 幀結構 ...........................................................................................................................................5 時隙結構 .......................................................................................................................................6 下行導頻時隙（DwPTS） ..................................................................................................6 上行導頻時隙（UpPTS） ...................................................................................................6 常規(guī)時隙 ................................................................................................................................6 傳輸信道到物理信道的映射 .......................................................................................................8 物理信道 ................................................................................................................................8 傳輸信道 ................................................................................................................................9 TDSCDMA 物理層過程 ....................................................................................................................12 基站間的同步技術 .....................................................................................................................12 發(fā)射功率控制 .............................................................................................................................12 上行控制 ..............................................................................................................................12 下行控制 ..............................................................................................................................13 上行同步 .....................................................................................................................................14 UpPCH .................................................................................................................................14 PRACH.................................................................................................................................14 DPCH 和 PUSCH ...............................................................................................................15 小區(qū)搜索過程 .............................................................................................................................15 隨機接入過程 .............................................................................................................................16 隨機接入準備 ......................................................................................................................16 隨機接入過程 ......................................................................................................................16 隨機接入沖突處理 ..............................................................................................................16TDSCDMA 培訓教材 iii 下行發(fā)射分集 .............................................................................................................................17 DPCH 的發(fā)射分集 ..............................................................................................................18 DwPTS 的發(fā)射分集 ............................................................................................................19 PCCPCH 的發(fā)射分集 ........................................................................................................19第三章 TDSCDMA 系統(tǒng)中的關鍵技術 ....................................................................................................21 智能天線 .............................................................................................................................................21 概述 .............................................................................................................................................21 基本原理 .....................................................................................................................................21 智能天線的主要功能及所應考慮的問題 .................................................................................23 智能天線的主要功能 ..........................................................................................................23 智能天線所帶來的新問題 ..................................................................................................24 聯(lián)合檢測 .............................................................................................................................................26 同步 CDMA ........................................................................................................................................30 接力切換 .............................................................................................................................................31 動態(tài)信道分配 .....................................................................................................................................37TDSCDMA 技術培訓教材 ? 第一章 TDSCDMA 技術概述 1第一章 TDSCDMA 技術概述 第三代移動通信（3G）標準 TDSCDMA 網(wǎng)絡架構UMTS 系統(tǒng)由 CN、UT