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该论文提出了一种用于毫米波5G通信的超分辨率混合信号Doherty功率放大器，通过混合信号架构和Doherty技术提升线性度和效率，解决高峰均比波形下的功率回退效率问题。
As the millimeter-wave (mm-wave) spectrum is believed to drive the next wireless communication revolution, there is a growing need for architectural research on advanced transmitter (TX) or power amplifier (PA) that can radically push the performance envelope of mm-wave power amplification to the next level [1]. This is especially true for future mm-wave 5G deployment that extensively employs high peak-to-average power ratio (PAPR) waveforms and poses demanding TXs/PAs requirements, including linearity, peak efficiency, power back-off (PBO) efficiency, and capability of supporting multi-Gb/s modulation [2-7]. Conventional analog mm-wave PAs usually suffer from steep PBO efficiency degradation and low average efficiency when amplifying high PAPR signals [2]. Although outphasing and Doherty PAs can enhance PBO efficiency, generating wideband outphasing signals often causes significant baseband overhead, while
Fei Wang, Tso-Wei Li, Hua Wang
Georgia Institute of Technology, Atlanta, GA