A Digitally Modulated 2.4GHz WLAN Transmitter with Integrated Phase Path and Dynamic Load Modulation in 65nm CMOS

📋 论文概要

本文提出了一种用于2.4GHz WLAN的数字调制发射机，集成了相位路径和动态负载调制技术，以解决Wi-Fi发射机在高峰均功率比OFDM调制下回退效率低的问题。该设计在65nm CMOS工艺中实现，无需片外相位调制仪器。

💡 主要创新点

• 集成了数字相位路径，避免了传统极坐标或outphasing架构中需要片外仪器进行相位调制的问题。
• 采用动态负载调制技术，提高了发射机在功率回退时的效率。
• 实现了完整的数字调制发射机系统，适用于高PAPR的OFDM信号。

🏷 关键词

📄 原文摘要

Wi-Fi transmitters (TXs) has been continuously rising, and has hence become increasingly problematic for mobile devices. To extend battery life, the TX must be efficient not only at peak power but also at backoff, due to the use of high Peak-to-Average-Power-Ratio (PAPR) OFDM modulation. Many recent works have aimed to enhance PA efficiency at back-off powers [1-4], but relatively few have integrated these techniques into a complete TX system. For example, previous designs employing digital polar or outphasing architectures often realized phase modulation with off-chip instruments. Similarly, while good close-in spectral performance has been shown, far-out spectral images remain problematic for TXs where the PA itself is digitally modulated. Moreover, previous works

👥 作者与机构

Lu Ye1, Jiashu Chen1, Lingkai Kong1, Philippe Cathelin2, Elad Alon1, Ali Niknejad1

University of California, Berkeley, CA, 2ST-Ericsson, Grenoble, France 1 In order to support higher throughputs, the power consumption of 2-to-5GHz