Envelope Modulator for Multimode Transmitters with AC-Coupled Multilevel Regulators

📋 论文概要

论文提出了一种用于多模发射机的包络调制器，采用交流耦合多级稳压器结构，以解决现代无线通信系统（如HSUPA/LTE）中高峰均比信号导致的功率放大器效率低下的问题，从而实现高效的包络跟踪（ET）技术。

💡 主要创新点

• 采用交流耦合多级稳压器代替传统线性稳压器，提高包络调制器的效率和带宽。
• 通过多级稳压器结构实现多模发射机对不同调制信号的兼容性，无需额外切换电路。

🏷 关键词

📄 原文摘要

STMicroelectronics, Prague, Czech Republic, 3 Czech Technical University, Prague, Czech Republic 1 2 Modern wireless communication systems, such as high-speed uplink packet access (HSUPA) or long term evolution (LTE), employ highly spectral-efficient modulations with inherent non-constant envelope signals having high peak-toaverage power ratio (PAPR). These signals require the RF Power Amplifiers (PAs) to be backed off from saturation to satisfy the stringent linearity requirements. Unfortunately, linear operation leads to very low overall system efficiency. The envelope tracking (ET) technique has been identified as one possible solution to improve the global efficiency of the RF transmission chain. This technique has raised interest in the optimization of the fast supply envelope modulator (EM), the most critical component in the system. Several topologies for the EM exist such as fast buck converters, multilevel buck converters [1] and

👥 作者与机构

Patrik Arnò1, Matthieu Thomas2,3, Vladimír Molata2,3, Tomáš Jeřábek2

STMicroelectronics, Grenoble, France,