In the process of mobile network planning and construction,interference problem between Time Division Synchronous Code Division Multiple Access (TD-SCDMA) and Personal Handyphone System (PHS) should be solved. First,a simulation is started on a TD-SCDMA single system platform,then the interference due to the PHS downlink on a TD-SCDMA uplink is analyzed. Finally,the space isolation is obtained. During the simulation,the TD-SCDMA system adopts an omnidirectional base station and a directional base station respectively. The two kinds of base stations are compared from the aspects of cell coverage distance and user interruption. The simulation results indicate that TD-SCDMA directional base station supports longer distance of cell coverage than omnidirectional base station. If TD-SCDMA and PHS coexist,a directional base station will require 10 dB less isolation than an omnidirectional base station.
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