【資料名稱】：ZXC10 BSSB(V8.0.3.400)基站系統(tǒng)基本原理

【資料作者】：中興

【資料日期】：2010

【資料語(yǔ)言】：中文

【資料格式】：PDF

【資料目錄和簡(jiǎn)介】：

1 CDMA概述.........................................................................................1-1
1.1 移動(dòng)通信發(fā)展歷史..............................................................................................1-1
1.2 三種移動(dòng)通信標(biāo)準(zhǔn)..............................................................................................1-2
1.2.1 WCDMA ..................................................................................................1-2
1.2.2 TD-SCDMA .............................................................................................1-3
1.2.3 cdma2000 ..................................................................................................1-3
1.3 cdma2000標(biāo)準(zhǔn)演進(jìn)..............................................................................................1-4
1.4 cdma2000特點(diǎn)和優(yōu)勢(shì)...........................................................................................1-5
1.5 cdma2000頻率分配..............................................................................................1-7
1.5.1 800MHz頻率分配......................................................................................1-7
1.5.2 450MHz頻率分配.....................................................................................1-8
1.5.3 1900MHz頻率分配.....................................................................................1-9
1.5.4 GoTa頻率分配..........................................................................................1-9
2 CDMA基本原理..................................................................................2-1
2.1 多址技術(shù)............................................................................................................2-1
2.1.1 FDMA ......................................................................................................2-2
2.1.2 TDMA......................................................................................................2-2
2.1.3 CDMA......................................................................................................2-3
2.2 擴(kuò)頻通信理論.....................................................................................................2-3
2.2.1 擴(kuò)頻通信定義...........................................................................................2-3
2.2.2 擴(kuò)頻通信基本原理....................................................................................2-4
2.2.3 擴(kuò)頻通信理論基礎(chǔ)....................................................................................2-5
2.2.4 處理增益和抗干擾容限..............................................................................2-6
2.3 偽隨機(jī)序列的設(shè)計(jì)及特性....................................................................................2-6
2.3.1 移位寄存器序列........................................................................................2-6
2.3.2 自相關(guān)特性............................................................................................. 2-10
2.3.3 互相關(guān)特性............................................................................................. 2-11
2.3.4 m序列的特征.......................................................................................... 2-12

2.4 CDMA中的擴(kuò)頻碼............................................................................................ 2-13
2.4.1 Walsh碼.................................................................................................. 2-13
2.4.2 PN短碼.................................................................................................. 2-14
2.4.3 PN長(zhǎng)碼.................................................................................................. 2-16
2.4.4 三種擴(kuò)頻碼的比較.................................................................................. 2-17
2.5 CDMA語(yǔ)音編碼技術(shù)......................................................................................... 2-18
2.5.1 聲碼器的功能......................................................................................... 2-18
2.5.2 A1和A2接口的語(yǔ)音編碼技術(shù).................................................................... 2-19
2.5.3 Ap接口的TrFO........................................................................................ 2-19
2.5.4 Ap接口的RTO ........................................................................................ 2-20
3 CDMA關(guān)鍵技術(shù)..................................................................................3-1
3.1 CDMA功率控制..................................................................................................3-1
3.1.1 功率控制的作用........................................................................................3-1
3.1.2 1X前向快速功率控制................................................................................3-2
3.1.3 反向功率控制...........................................................................................3-5
3.2 CDMA軟切換................................................................................................... 3-10
3.2.1 切換的作用............................................................................................. 3-10
3.2.2 切換基本概念......................................................................................... 3-10
3.2.3 切換類型................................................................................................ 3-12
3.3 分集接收.......................................................................................................... 3-23
3.3.1 基本概念................................................................................................ 3-23
3.3.2 分集類型................................................................................................ 3-24
3.3.3 分集接收技術(shù)......................................................................................... 3-26
4 cdma2000 1X基本原理.........................................................................4-1
4.1 信道調(diào)制和編碼過(guò)程...........................................................................................4-1
4.1.1 卷積編碼..................................................................................................4-2
4.1.2 Turbo編碼.................................................................................................4-2
4.1.3 塊交織......................................................................................................4-5
4.1.4 擾碼.........................................................................................................4-7
4.1.5 擴(kuò)頻.........................................................................................................4-7
4.1.6 調(diào)制.........................................................................................................4-7
4.2 IS-95信道...........................................................................................................4-8
II
4.2.1 前向信道................................................................................................ 4-10
4.2.2 反向信道................................................................................................ 4-15
4.3 移動(dòng)臺(tái)狀態(tài)變遷流程......................................................................................... 4-20
4.4 cdma2000 1x的特性............................................................................................ 4-21
4.5 cdma2000 1x信道............................................................................................... 4-22
4.6 商用系統(tǒng)里使用的cdma2000新增信道................................................................. 4-25
4.6.1 快速尋呼信道......................................................................................... 4-25
4.6.2 前向補(bǔ)充信道......................................................................................... 4-25
4.6.3 反向?qū)ьl信道......................................................................................... 4-26
4.6.4 反向補(bǔ)充信道......................................................................................... 4-27
4.7 擴(kuò)頻速率和無(wú)線配置......................................................................................... 4-27
5 cdma2000 1xEV-DO基本原理..............................................................5-1
5.1 1xEV-DO系統(tǒng)概述.............................................................................................5-1
5.1.1 1xEV-DO設(shè)計(jì)思想...................................................................................5-1
5.1.2 1xEV-DO與IS-95/1X網(wǎng)絡(luò)的兼容性...........................................................5-3
5.1.3 EV-DO的特點(diǎn)..........................................................................................5-3
5.2 1xEV-DO Release 0 .............................................................................................5-4
5.2.1 1xEV-DO Release 0網(wǎng)絡(luò)參考模型...............................................................5-4
5.2.2 1xEV-DO Release 0空中接口協(xié)議模型...................................................... 5-11
5.2.3 1xEV-DO Release 0前向信道................................................................... 5-13
5.2.4 1xEV-DO Release 0反向信道................................................................... 5-22
5.2.5 1xEV-DO Release 0空中接口關(guān)鍵技術(shù)...................................................... 5-32
5.2.6 1xEV-DO組網(wǎng)與混合終端選網(wǎng)................................................................ 5-40
5.3 1xEV-DO Rev.A ............................................................................................... 5-43
5.3.1 1xEV-DO Release 0功能限制................................................................... 5-43
5.3.2 1xEV-DO Rev.A技術(shù)改進(jìn)....................................................................... 5-44
5.3.3 1xEV-DO Rev.A空中接口協(xié)議模型.......................................................... 5-45
5.3.4 1xEV-DO Rev.A前向信道....................................................................... 5-50
5.3.5 1xEV-DO Rev.A前向鏈路物理層............................................................. 5-51
5.3.6 1xEV-DO Rev.A反向信道....................................................................... 5-55
5.3.7 1xEV-DO Rev.A反向鏈路物理層............................................................. 5-57
5.3.8 1xEV-DO Rev.A關(guān)鍵技術(shù)....................................................................... 5-62
III
5.3.9 1xEV-DO Rev.A特色業(yè)務(wù)....................................................................... 5-73
5.4 1xEV-DO Rev.B ............................................................................................... 5-75
5.4.1 1xEV-DO Rev.B定義.............................................................................. 5-75
5.4.2 1xEV-DO Rev.B關(guān)鍵技術(shù)....................................................................... 5-75
圖目錄................................................................................................................................................................... II
表目錄................................................................................................................................................................VII
縮略語(yǔ)表..............................................................................................IX