[1]张雷,洪伟,周健义,等.3.5 GHz WiMAX 射频功率放大器的实现及其预失真模型[J].东南大学学报(自然科学版),2010,40(6):1129-1133.[doi:10.3969/j.issn.1001-0505.2010.06.001]
 Zhang Lei,Hong Wei,Zhou Jianyi,et al.Development and predistortion of 3.5 GHz WiMAX RF power amplifier[J].Journal of Southeast University (Natural Science Edition),2010,40(6):1129-1133.[doi:10.3969/j.issn.1001-0505.2010.06.001]
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3.5 GHz WiMAX 射频功率放大器的实现及其预失真模型()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第6期
页码:
1129-1133
栏目:
电磁场与微波技术
出版日期:
2010-11-20

文章信息/Info

Title:
Development and predistortion of 3.5 GHz WiMAX RF power amplifier
作者:
张雷 洪伟 周健义 翟建锋
东南大学毫米波国家重点实验室,南京 210096
Author(s):
Zhang Lei Hong Wei Zhou Jianyi Zhai Jianfeng
State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
关键词:
射频功率放大器 负载牵引 WiMAX 行为级模型 预失真
Keywords:
RF power amplifier load-pull WiMAX behavioral model predistortion
分类号:
TN84
DOI:
10.3969/j.issn.1001-0505.2010.06.001
摘要:
针对IEEE 802.16e WiMAX标准设计并实现了中心频率为3.5GHz、峰值功率为10W的LDMOS大功率射频功率放大器.采用负载牵引法确定了功放管的最佳输入和输出阻抗.各项指标的仿真结果与实测结果高度吻合.提出一种低记忆功放并结合间接学习的方法,对该功放进行行为级建模和数字预失真, 同时建立了多载波信号产生和采集的软硬件平台.实验结果表明,对于三载波W-CDMA宽带输入信号,当输出平均功率为30dBm时,采用仅7个系数的Hammerstein模型,即可得到-47.5dBc的邻道泄漏(ACLR)指标,改善度达到14dB.相对于传统的预失真技术,提出的方法能够在保证预失真性能的同时减少计算量,具有良好的应用前景.
Abstract:
A 10 W-peak 3.5GHz LDMOS(lateral diffused MOSFET)power amplifier is designed according to the 802.16e WiMAX specification. The load-pull technique is used in decision of the best input/output impedances of the power transistor. The simulated values are in agreement with the experimental results. A method based on memory effect minimization and indirect learning is proposed and applied successfully to the behavioral modeling and digital predistortion of the implemented power amplifier. The workbench of muti-carrier signal generation and collection is also constructed. The experimental results show that a specification of-47.5dBc, with an improvement of 14dB, can be achieved for the power amplifier characterized by a Hammerstein model with only seven coefficients, driven by three-carrier W-CDMA wideband signal with an average output power of 30dBm. Compared with conventional digital predistortion technique, the computational complexity can be reduced while high performance is maintained when the proposed method is adopted, which shows its promising application.

参考文献/References:

[1] Chakchai So-In,Jain R,Tamimi A K.Scheduling in IEEE 802.16e mobile WiMAX networks:key issues and a survey[J].IEEE Journal on Selected Areas in Communications,2009,27(2):156-171.
[2] Xiao H,Zhang L,Huang R,et al.A novel RF LDMOS fabricated with standard foundry technology [J].Electron Device Letters,2009,30(4):386-388.
[3] Nemati H,Fager C,Thorsell M,et al.High-efficiency LDMOS power-amplifier design at 1 GHz using an optimized transistor model [J].IEEE Transactions on Microwave Theory and Techniques,2009,57(7):1647-1654.
[4] Pedro J C.A comparative overview of microwave and wireless power-amplifier behavioral modeling approaches[J].IEEE Transactions on Microwave Theory and Techniques,2005,53(4):1150-1163.
[5] Zhu A,Pedro J C,Brazil T J.Dynamic deviation reduction-based Volterra behavioral modeling of RF power amplifiers[J].IEEE Transactions on Microwave Theory and Techniques,2006,54(12):4323-4332.
[6] Morgan D R,Ma Z X,Kim J,et al.A generalized memory polynomial model for digital predistortion of RF power amplifiers [J].IEEE Transactions on Microwave Theory and Techniques,2006,54(10):3852-3860.
[7] Mirri D,Luculano G,Filicori F,et al.A modified Volterra series approach for nonlinear dynamic systems modeling[J].IEEE Transactions on Circuits and Systems Ⅰ:Fundamental Theory and Applications,2002,49(8):1118-1128.
[8] Ding L,Zhou G T,Morgan D R,et al.A robust digital baseband predistorter constructed using memory polynomials[J].IEEE Transactions on Communications,2004,52(1):159-165.
[9] Hong S,Woo Y Y,Kin J,et al.Weighted polynomial digital predistortion for low memory effect Doherty power amplifier[J].IEEE Transactions on Microwave Theory and Techniques,2007,55(5):925-931.
[10] Khanifar A,Maslennikov N,Vassilakis B.Bias circuit topologies for minimization of RF amplifier memory effects[C] //European Microwave Conference.Munich,Germany,2003:1349-1352.
[11] Franco M,Guida A,Katz A,et al.Minimization of bias-induced memory effects in UHF radio frequency high power amplifiers with broadband signals[C] //IEEE Radio and Wireless Symposium.Long Beach,CA,USA,2007:369-372.

备注/Memo

备注/Memo:
作者简介: 张雷(1972—), 男, 博士, 讲师; 洪伟(联系人),男,教授,博士生导师, weihong@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(60621002)、国家高技术研究发展计划(863计划)资助项目(2007AA01Z2B4).
引文格式: 张雷,洪伟,周健义,等.3.5GHz WiMAX 射频功率放大器的实现及其预失真模型[J].东南大学学报:自然科学版,2010,40(6):1129-1133. [doi:10.3969/j.issn.1001-0505.2010.06.001]
更新日期/Last Update: 2010-11-20