WCDMA功率控制技术的研究与实现

介绍了功率控制技术的作用和分类,以及宽带码分多址(WCDMA)系统反向闭环功率控制的技术标准和组成部分,分析得出了WCDMA系统反向功率控制实现的定时限制条件.讨论了影响功率控制技术性能的几个关键因素:信扰比(SIR)估计精度、步长选择、功控比特传输错误及功控时延等,并给出了仿真曲线和结果分析.最后给出了WCDMA系统前、反向功率控制技术基于FPGA的实现结构框图和测试结果.

Power Control Techniques in WCDMA

The functions of power control techniques, such as compensating the fading effect of wireless channel and reducing the near far effect to enhance the system capacity are briefly introduced. The classification of power control is discussed. The technical standard and component parts of reverse link closed loop power control in WCDMA system are presented, and the timing constrains of WCDMA reverse link power control in implementation are analyzed. After that, several main factors that affect the performance of power control, estimation precision of SIR, step size, error rate of TPC decision and time delay of TPC etc are discussed, and the simulation curves and analysis of the first three cases are provided. At last the implementation architecture and test results of forward and reverse link power control based on FPGA in WCDMA system are also given.