⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种基于相间交错和多亚谐波开关技术的数字功率放大器，针对OFDM等高PAPR信号下功率回退效率低的问题，实现了31.4%的平均漏极效率，并支持瓦特级输出功率。
Modern wireless communication systems often utilize spectrum-efficient modulation schemes for higher data throughput, given the finite bandwidth. This type of modulation schemes, such as Orthogonal Frequency Division Multiplexing (OFDM), results in a high peak-to-average power ratio (PAPR) for the transmitted signal. Therefore, power amplifier efficiency in the power back-off (PBO) region has become an important design target. Meanwhile, obtaining high output power and high average efficiency still remains a key design challenge when developing an integrated CMOS PA. Recently, a subharmonic switching (SHS) digital PA architecture was reported in [1]. It toggles the PA cell at the subharmonic component of the carrier frequency (Fc) to achieve power back-off. The slower toggling rate reduces dynamic and conduction loss in the switching PA, resulting in better PBO efficiency. However, the SHS PA requires additional notch filtering
Aoyang Zhang, Mike Shuo-Wei Chen
University of Southern California, Los Angeles, CA