摘要
该文针对 cdma2000系统的反向链路,建立了反向外环的理论模型,展示了内环与外环间的紧密联系,提出了一种误帧率的简化估计方法,并对该方法的估计误差进行了分析,在此模型的基础上,从减小用户发射功率及误帧率波动的目标出发,提出了一种外环功率控制的算法。该算法可以保证用户在达到目标误帧率的同时,发射功率最小,从而使系统的性能达到最优,该算法允许系统通过调整权系数以满足不同的业务性能要求,因而有很好的灵活性,仿真结果验证了所提出模型的正确性和优化算法的有效性。
An out-loop power control model for the cdma2000 reverse link is established, and the relationship between the inner-loop and the out-loop is revealed. As a result, a simple estimation method for Frame Error Rate (FER) is proposed and its performance is analyzed. Based on the model, an optimization algorithm for the out-loop power control is proposed which aims to jointly reduce the transmit power and FER variation. It can guarantee target FER while keeps transmit power at the minimum level, resulting an optimal system performance. The algorithm allows the weighting factors to be adjusted to satisfy different Quality of Service (QoS) requirements, hence provides great flexibility. Finally, computer simulation is performed to show that the model is appropriate and the optimization algorithm is effective and correct.
出处
《电子与信息学报》
EI
CSCD
北大核心
2003年第6期801-807,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(60072040)
