TD-SCDMA下行链路对WCDMA上行链路干扰分析

针对TD-SCDMA下行链路对WCDMA上行链路间干扰产生原理进行研究,建立基于Monte Carlo仿真方法的仿真模型,并将自适应变步长功率算法应用于仿真中。仿真比较自适应变步长算法和传统的固定步长算法,并将改进后的功率控制算法应用于1920MHz语音业务的TD-SCDMA下行链路对WCDMA上行链路干扰仿真中。实验结果表明,系统总发射功率一定时,自适应变步长功率控制算法取得较高的信干比,可减小系统干扰;并得出不同参数设置对TD-SCDMA与WCDMA系统共站时的影响,给出两系统共站时ACIR建议值。为异系统混合组网及网络优化提供一定的参考。

Analysis of TD-SCDMA Downlink Interference with WCDMA Uplink

The principle of the interference between TD-SCDMA uplink and WCDMA downlink was analyzed,and then build system simulation model based on Monte Carlo.Adaptive variable step power control algorithm was used into the simulation.By simulation,traditional fixed step algorithm was compared with adaptive variable step power control algorithm,the coexistence interference of TD-SCDMA uplink and WCDMA downlink was simulated for speech users only in a macro-to-macro cells scenario considering 1920MHz frequency.The result shows that a higher SINR value is achieved by adaptive variable step power control algorithm if the total transmission power is invariant,so it could reduce the system interference.According to the simulation results,different parameters settings are presented about the coexistence influence between TD-SCDMA and WCDMA system,and ACIR value are provided about system coexistence.It provides valuable reference for the research of hybrid network planning and optimizing.