宏分集技术_恋爱的技术ftp_分集技术包括(2)

完善的远程网络管理系统，能够对所有主要的系统参数进行和设置，在运营商进行网络参数修改时可以方便即时地进行修改 完善的远程故障告警与统计系统，可以实时反馈所有故障信息，内置的直流供电单元在停电后仍能支持远程网管系统的工作，大大减少了维护的工作量。 和普通直放站的比较 和室内/室外分布式天线系统的比较 和微蜂窝系统的比较 讨论！ Simulcasting results in an increased coverage probability in areas where a mobile receives the signal from 2, 3 or more cDICS units. Two effects occur: The received mean signal level increases The standard deviation of the fading is reduced The negative effects of both Lognormal Shadow fading and Fast Multipath fading are reduced. In addition to the gains from simulcasting in the overlap areas between cDICS units, the DICS system improves the signal levels in the outer parts of conventional radio cells, and thus improves the service quality throughout the cell area. This is particularly important for high speed data applications like GPRS and EDGE which would not work in the outer parts of many conventionally-designed radio cells due to the better signal conditions they require compared to speech or low rate data transmission. Moreover, the signal levels at the edge of a DICS cell area typically roll off faster than those of a conventional cell. This also improves the quality of the network by reducing interference. The faster signal level roll-off also leads to sharper cell edges and better-defined handover boundaries, which also improves the network quality by increasing the handover success rate. mobiles can also run at reduced power in a DICS network

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