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OFDM系统高效Doherty功率放大器设计 被引量：3

Design of a highly efficient Doherty power amplifier for the OFDM system
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摘要 针对OFDM信号的高峰均比(PAPR)特性,提出了一种倒置结构的Doherty功率放大器.使Doherty的输出结合点由峰值放大器的末端转换到载波放大器的末端,提高了载波放大器的负载调制效率.与传统的Doherty功率放大器相比,其有效的负载调制使该功率放大器的功率附加效率提高了3%.实测结果表明,该放大器在功率回退10 dB时仍维持27.8%的功率附加效率,同时其三阶互调失真(IMD3)和邻道泄漏比(ACLR)分别有2.5 dB和2 dB的改进,适用于OFDM通信. An inverted Doherty power amplifier is proposed for the OFDM with the characteristic of high power to average power ratio （PAPR）. The inverted structure changes its combining node from the end of the peak amplifier to the carrier amplifier, which improves the efficiency of load modulation in the carrier amplifier. Compared with the conventional Doherty power amplifier, the power added efficiency （PAE） of the proposed amplifier is improved by 3% due to its effective impedance modulation. Measurement results show that the PAE of the proposed amplifier remains about 27.8% with 10dB output power back-off. Its third-order intermodulation distortion （IMD3） and adjacent channel power ratio （ACPR） are improved by 2. SdB and 2dB respectively, which could be applied to OFDM communication well.
作者 陈小群 郭玉春 史小卫
机构地区 西安电子科技大学天线与微波技术重点实验
出处 《西安电子科技大学学报》 EI CAS CSCD 北大核心 2008年第6期1020-1025,共6页 Journal of Xidian University
基金 国家自然科学基金资助(60571057)
关键词 DOHERTY功率放大器 峰均比 功率附加效率 OFDM系统 Doherty power amplifier power to average ratio power added efficiency
分类号 TN722.7 [电子电信—电路与系统]
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参考文献10

  • 1Bohge M, Gross J, Wolisz A, et al. Dynamic Resource Allocation in OFDM Systems.. an Overview of Cross-layer Optimization Principles and Techniques[J]. IEEE Network, 2007, 21(1): 53-59.
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  • 3Hoh T, Ge Jianhua, Geng Shujian, et al. A Nonlinearity Predistortion Technique for HPA with Memory Effects in OFDM Systems [J]. Nonlinear Anal Real World Appl, 2007, 8(1) : 249-256.
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二级参考文献1

共引文献13

同被引文献22

  • 1支传德,杨华中,汪蕙.CMOS射频功率放大器的设计方法[J].电子技术应用,2006,32(9):1-3. 被引量：2
  • 2王冲,张金风,郝跃,冯倩,杨燕,张进城.AlGaN/GaN HEMT在N_2中高温退火研究[J].西安电子科技大学学报,2006,33(6):862-865. 被引量：2
  • 3支传德,杨华中.射频包络消除与恢复功率放大器性能分析[J].Journal of Semiconductors,2007,28(4):582-586. 被引量：5
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  • 10Tu S H L, Chen S C H. 5.25 GHz CMOS Cascode Power Amplifier for 802.11 a Wireless Local Area Network [ J ]. IET Microwaves, Antennas & Propagation,2008,2 (6) :627-634.

引证文献3

二级引证文献6

西安电子科技大学学报
2008年 第6期

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