包络跟踪电源优化设计与仿真-微电子学.PDF

第44卷 第4期 微 电 子 学 Vol.44,No.4 2014年8月 Microelectronics Aug.2014 包络跟踪电源优化设计与仿真 张经纬，鲍景富，易 亮 (电子科技大学 电子工程学院，成都 611731) 摘 要：在移动通信3G/4G 网络中，包络跟踪技术是提高射频功放效率的核心技术之一。从包络 跟踪的相位失真问题入手，以降压变换器为拓扑，提出了以4 阶贝塞尔低通滤波器传递函数为整 体设计模型的包络跟踪电源设计方法，通过线性补偿控制实现对包络跟踪电源的控制。同时，依 据线性控制单元在实际设计中可能遇到的问题，提出了一种更为适合实际应用的线性控制器设计 方法。最后，通过软件Pspice对此包络跟踪电源进行仿真验证，以降带宽处理后的单载波1MH 信道宽度 WCDMA 包络信号作为跟踪参考信号，通过软件matlab simulink仿真对包络跟踪 电源进行验证，证明方案实际应用可行。 关键词：4 阶贝塞尔低通滤波器；线性补偿控制；包络跟踪电源 中图分类号：TN86 文献标识码：A 文章编号：1004-3365(2014)04-0489-06 OptimizedDesignandSimulationofEnvelopeTrackingPowerSupply ZHANGJingwei,BAOJingfu,YILiang (ElectronicEngineeringInstitute, Univ.ofElec.Sci.Technol.ofChina,Chengdu611731,P.R. China) Abstract： Envelope tracking(ET) technology was considered as one of the core technology in improving the efficiency of RF power amplifier in 3G and 4G mobile communication. Startingwith phase distortion of ET, a design methodbased on4thorderBessellowpassfiltertransfer functionwasbroughtup.Linearcompensationcontrolwasused to control the ET power supply. Meanwhile, a more suitable method for practical application of linear compensation control design was proposed according to the problems from actual design. Finally, ETpower supplywas simulatedby pspice with 1MH sinusoidal signal serving as reference signal. In the same manner, simulink in matlab was used to simulate the ET power supply with bandwidth-reduced 1 MH single-carrier WCDMA envelope signal serving as referencesignal.Thedesignschemewasprovedpracticable. th Keywords：4 orderBessellowpassfilter ；Linearcompensationcontrol ；Envelopetrackingpowersupply