上下行平衡条件

1、内部资料 LP传输损耗（含收发天线）手机上、下行平衡条件BTS下行发射功率：PTb 手机发射功率：PMBTS 噪声系数： NFb 手机噪声系数： NFM等效输入噪声电平： PNb =K·T·B dB + NFb 等效输入噪声电平： PNM=K·T·B dB + NFM上行接收信号电平PRbBTS等效输入噪声电平PNb下行接收信号电平PRM手机等效输入噪声电平PNMBTS上行接收信号电平：PRb =PM - LP 手机下行接收信号电平：PRM =PTb - LP上行载噪比： C/N上= 下行载噪比： C/N下= = PRbdB - PNbdB = PRMd

2、B - PNMdB = PM -LP- K·T·B dB- NFb = PTb -LP- K·T·B dB- NFM 上下行平衡条件： C/N上=C/N下 PM -LP- K·T·B dB- NFb= PTb -LP- K·T·B dB- NFM PM - NFb= PTb - NFM基站发射功率+基站噪声系数=手机发射功率+手机噪声系数 或 PTb + NFb= PM + NFM基站与直放站级联系统噪声系数NF与传输损耗Ld直放机增益G的关系第一级 第二级NFbNFr NF2 =NFb + Ld NF1 =NFr

3、基站接收到直放站噪声电平：PNb =K·T·B dB + G+NFr-Ld NF2-1 G1NF2-1 G1基站与直放站级联系统噪声系数：NF =NF1 + NF =10log NF1+ dB设直放站本机噪声系数：NFr =4dB、基站噪声系数：NFb =2dBPNb (dBm)Ld (dB)G/NF (dB)-115-116-117-118 -119（基站噪 声电平）-120-121-122-123-124-1258082/5.481/5.880/6.179/6.578/7.077/7.576/8.175/8.674/9.473/10.272/11.08587/5.486

4、/5.885/6.184/6.583/7.082/7.581/8.180/8.679/9.478/10.277/11.09092/5.491/5.890/6.189/6.588/7.087/7.586/8.185/8.684/9.483/10.282/11.09597/5.496/5.895/6.194/6.593/7.092/7.591/8.190/8.689/9.488/10.287/11.0100102/5.4101/5.8100/6.199/6.598/7.097/7.596/8.195/8.694/9.493/10.292/11.0105107/5.4106/5.8105/6.110

5、4/6.5103/7.0102/7.5101/8.175/8.699/9.498/10.297/11.0110112/5.4111/5.8110/6.1109/6.5108/7.0107/7.5106/8.1105/8.6104/9.4103/10.2102/11.0BTS下行发射功率：PTb 手机发射功率：PMBTS 噪声系数： NFb 手机噪声系数： NFM等效输入噪声电平： PNb =K·T·B dB + NFb 等效输入噪声电平： PNM=K·T·B dB + NFMBTS上行接收信号电平：PRb =PM - LP 手机下行接收信号电平：PRM =PTb - LP上行载噪比： C/N上= PRb/PNb 下行载噪比： C/N下= PRM/PNM = PRbdB - PNbdB = PRMdB - PNMdB = PM -LP- K·T·B dB- NFb = PTb -LP- K·T·B dB- NFM上下行平衡条件： C/N上=C/N下 PM -LP- K·T·B dB- NFb= PTb -LP-