TD-SCDMA中基于连续型模糊控制的外环功率控制算法

孙毅; 李芹; 唐良瑞

doi:10.3724/SP.J.1146.2009.00994

TD-SCDMA中基于连续型模糊控制的外环功率控制算法

doi: 10.3724/SP.J.1146.2009.00994

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出版历程
- 收稿日期: 2009-07-10
- 修回日期: 2009-11-25
- 刊出日期: 2010-07-19

The Outer Loop Power Control Algorithm Based on Continuous Fuzzy Control in TD-SCDMA

摘要

摘要: 该文提出一种基于连续型模糊控制的外环功率控制算法，它对误块率的变化量进行模糊化处理，通过模糊控制规则和解模糊化处理得到输出值，作为内环功率控制的信干比目标值调整步长。该算法能精确给出最佳调整步长，在很大程度上避免了已有的外环功率控制方法的过调现象。并能随着网络及无线环境的变化，使实际系统的平均误块率快速收敛于满足服务质量所需的误块率目标值。实验结果验证了该算法的优良特性。
- 无线通信; TD-SCDMA; 模糊控制; 外环功率控制; 误块率
Abstract: An out loop power control algorithm based on continuous fuzzy control is presented in this paper. The variation value of the block error rate is processed by fuzzy control, and the output value which is obtained by fuzzy control rules and defuzzification is adopted as the step size to adjust the SIR target of the inner loop power control. The algorithm can acquire the best adjusting step accurately, thus it avoids the overshoot phenomenon of the existing outer power control methods. In addition, with the variation of the network and the wireless environment, the average BLER can fast converge at the required BLER target value which meets the quality of the services. The experimental results validate the excellent properties of the algorithm.

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