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为了克服CDMA系统的远近效应和边缘效应,解决CDMA网络容量受限的问题,采用了功率控制技术,对前向链路减小基站发射功率,对反向链路调整移动台发射功率,降低系统内的干扰水平,满足用户QoS要求,有效提高CDMA系统容量。理论阐述了功率控制技术与CDMA系统容量的关系,从系统载扰比分析入手验证了功率控制对CDMA系统容量的影响,得到了基于功率控制技术两种容量优化方法即远近控制和C/I控制。实际案例仿真结果表明,通过优化功率控制参数的方法能够有效地提升CDMA系统的容量,促使CDMA网络软容量达到最佳,为CDMA网络优化人员提供可以借鉴的思路和方法。
In order to overcome the CDMA system’s near-far effect and edge effect and solve the problem of limited CDMA network capacity, the power control technology is adopted to reduce the transmit power of the base station on the forward link, to adjust the transmit power of the mobile station on the reverse link, Within the level of interference to meet user QoS requirements and effectively improve the CDMA system capacity. The relationship between power control technology and capacity of CDMA system is expounded theoretically. The effect of power control on the capacity of CDMA system is verified from the system carrier-to-interference ratio analysis. Two capacity optimization methods based on power control are obtained, that is, far and near control and C / I control . The simulation results show that optimizing the power control parameters can effectively improve the capacity of the CDMA system, promote the soft network capacity of the CDMA network to the best, and provide some ideas and methods for the CDMA network optimization staff to learn.