CFR算法在3G射频功率放大器设计中的应用

摘要

Considering efficiency improvement of digital power amplifier in the current 3G base stations, the application of CFR algorithm module was proposed. The effect of the application of CFR algorithm module on performance of digital power amplifier was analyzed, and block diagram of system was showed. The whole process of improving efficiency of power amplifier by filtering error signal after clipped, and getting clipped signal by subtracting error signal from original signal was described in detail. Finally, the comparison between performance parameters of MATLAB simulation results before and after CFR algorithm application are given, which indicates PAR and CCDF decrease after CFR is applied, and the method is practically validated.%针对如何提高3G基站中数字功率放大器的效率问题,提出了CFR算法的运用.分析了应用CFR模块后对功率放大器性能的影响,给出了系统框图.详细阐述了在CFR算法中通过对削峰后的误差信号进行滤波处理,将原始信号减去经过处理的误差信号,得到削峰后的信号,从而提高了功率放大器的效率.最后使用了MATLAB仿真演示了运用CFR模块前后的放大器性能参数的对比结果,证明应用CFR算法后,降低了峰均比,减小了CCDF,验证了方法的有效性.