提高CMOS射频功率放大器效率和线性度的自适应数字技术

2008 IEEE International Symposium on VLSI Design, Automation and Test (VLSI-DAT) Pub Date : 2008-04-23 DOI:10.1109/VDAT.2008.4542443

D. Kwon, Hao Li, Y. Chili

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引用次数: 3

摘要

提出了一种基带自适应数字补偿技术，用于下一代OFDM无线发射机的低成本CMOS集成。高功率效率和线性度同时实现了使用b类功率放大器(PA)与较少的回退和处理无记忆的AM-AM和AM-PM失真在数字域。当传输64-QAM OFDM信号时，计算机仿真表明，补偿后的ACPR和EVM分别提高了13 dB和30 dB。PA的平均功率效率为10.9%，而典型使用模式下的a类等效功率效率为3.2%。

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Adaptive digital techniques for efficiency and linearity enhancement of CMOS RF power amplifiers

This paper presents a baseband adaptive digital compensation technique for cost-effective CMOS integration of next-generation OFDM wireless transmitters. High power efficiency and linearity are simultaneously achieved by using a class-B power amplifier (PA) with less back-off and treating the memoryless AM-AM and AM-PM distortions in the digital domain. When a 64-QAM OFDM signal is transmitted, computer simulations indicate that the post-compensation ACPR and EVM are improved by 13 dB and 30 dB, respectively. The average power efficiency of the PA is 10.9% as opposed to 3.2% of a class-A counterpart for typical usage patterns.

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来源期刊

2008 IEEE International Symposium on VLSI Design, Automation and Test (VLSI-DAT)

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