GSM干扰分析（华为）

hailangsurf

GSM干扰分析（华为）

课程说明......................................................................................................................................1
课程介绍......................................................................................................................................1
课程目标......................................................................................................................................1
相关资料......................................................................................................................................1
第 1章概述..................................................................................................................................2
1.1 干扰对网络的影响..................................................................................................................2
第 2章干扰源...............................................................................................................................3
2.1 干扰源分类.............................................................................................................................3
2.1.1 自然噪声......................................................................................................................3
2.1.2 人为噪声......................................................................................................................3
2.2 对移动通信有主要影响的干扰源............................................................................................4
第 3章干扰问题的发现................................................................................................................6
3.1 通过OMC话统发现干扰........................................................................................................6
3.2 OMC告警和用户申告............................................................................................................8
3.3 通过路测发现干扰..................................................................................................................9
第 4章定位和排除干扰源...........................................................................................................10
4.1 干扰定位和排查建议步骤.....................................................................................................10
4.1.1 根据关键性能指标KPI 确定干扰小区...................................................................10
4.1.2 检查OMC告警..........................................................................................................10
4.1.3 检查频率规划.............................................................................................................10
4.1.4 检查小区参数设置.....................................................................................................11
4.1.5 路测...........................................................................................................................11
4.1.6 干扰排除....................................................................................................................11
4.2 硬件故障定位和排除............................................................................................................11
4.2.1 天线性能下降.............................................................................................................12
4.2.2 天线或馈管进水.........................................................................................................13
4.2.3 天馈接头故障.............................................................................................................13
4.2.4 天线接反....................................................................................................................14
4.2.5 基站跳线接错.............................................................................................................15
4.2.6 TRX故障...................................................................................................................16
4.2.7 时钟失锁....................................................................................................................19
4.2.8 小结...........................................................................................................................20
4.3 网内干扰...............................................................................................................................20
4.3.1 同频干扰....................................................................................................................20
4.3.2 邻频干扰....................................................................................................................23
4.3.3 越区覆盖导致干扰.....................................................................................................24
4.3.4 紧密复用引起干扰.....................................................................................................25
MF000403 GSM干扰分析ISSUE1.0 目录
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4.4 直放站干扰...........................................................................................................................26
4.5 网外干扰...............................................................................................................................27
4.5.1 微波干扰....................................................................................................................27
4.5.2 大功率电台干扰.........................................................................................................28
4.5.3 地面卫星站干扰.........................................................................................................29
4.6 数据配置或设定错误导致干扰..............................................................................................30
4.7 其它导致干扰的现象............................................................................................................32
4.8 虚假干扰...............................................................................................................................34
第 5章抗干扰措施......................................................................................................................36
第 6章干扰测试工具..................................................................................................................37
6.1 频谱仪的基本知识介绍.........................................................................................................37
6.2 定向天线...............................................................................................................................38
第 7章干扰的测试方法..............................................................................................................39
7.1 内部干扰的测试方法............................................................................................................39
7.2 外部干扰的测试方法............................................................................................................39
7.3 外部干扰源的搜索方法.........................................................................................................40

[ 本帖最后由 hailangsurf 于 2010-3-21 19:18 编辑 ]