PHS下行对TD-SCDMA上行的干扰

The Interference from Downlink of PHS System on Uplink of TD-SCDMA System

移动网络的规划和建设中需要解决时分同步码分多址(TD-SCDMA)系统与个人手持机系统(PHS)之间的干扰问题。通过基于TD-SCDMA单系统平台仿真分析PHS下行对TD-SCDMA上行的干扰,可得出TD-SCDMA系统与PHS系统共存所需的空间隔离度。仿真中TD-SCDMA系统的基站分别采用全向基站和定向基站比较两种不同类型基站的蜂窝小区覆盖距离和用户的中断情况。仿真结果表明,TD-SCDMA系统基站采用定向基站,小区覆盖的距离比全向基站远,与PHS系统共存所需的空间隔离度比采用全向基站小10dB。

It is necessary to solve the interference problem between Time Division Synchronous Code Division Multiple Access （TD-SCDMA） and Personal Handy-phone System （PHS） during the process of planning and building a mobile network. The space isolation required between TD-SCDMA and PHS can be obtained by analyzing the interference from the PHS downlink on the TD-SCDMA uplink based on the emulation for a single TD-SCDMA system. In the TD-SCDMA System emulation, the omni-directional and direction-orientd base stations are used and a comparision is made betweem them in terms of coverage distance and interruption of user traffic. The results show that the directon-oriented base station has a longer coverage distance and a 10 dB decrease in isolation.