CDMA技术信息(CDMA Technology Information)

【名称】：CDMA技术信息(CDMA Technology Information)
【作者】：John Danahy
【格式】：PDF
【页数】：24
【语言】：中文(默认)
【摘要或目录】：
1.0 CDMA Standards History....................................................................................................................3
2.0 Reverse/Forward Channels..................................................................................................................3
3.0 Cell Plan......................................................................................................................................................5
3.1 Omni-directional Cell Sites.............................................................................................................5
3.2 Sectored Cell Sites................................................................................................................................6
4.0 AMPS and CDMA coexistence...........................................................................................................6
5.0 Forward Channels.................................................................................................................................6
5.1 Pilot Channels........................................................................................................................................6
5.1.2 Walsh Codes....................................................................................................................................8
5.2 Synchronization Channel....................................................................................................................9
5.3 Paging Channel.................................................................................................................................10
5.4 Traffic Channel.................................................................................................................................12
6.0 Reverse Channels..................................................................................................................................14
6.1 Access Channel:........................................................................................................................................14
6.2 Traffic Channel.................................................................................................................................15
6.2.1 Reverse Vocoder..........................................................................................................................15
6.2.2 CDMA Frames..............................................................................................................................16
6.2.3 Reverse Traffic Link...................................................................................................................19
6.2.4 Open Loop Power.........................................................................................................................19
6.2.5 Rake Receiver................................................................................................................................19
7.0 HandOffs..................................................................................................................................................20
7.1 Soft Handoff.......................................................................................................................................20
7.2 Hard Handoff.....................................................................................................................................21
8.0 Orthogonal Spreading.........................................................................................................................22
9.0 Differences between IS200 and IS95B...........................................................................................23

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