A Power-Efficient CORDIC-less Digital Polar Transmitter Using 1b DSM-Based PA Supporting 256-QAM

📋 论文概要

本文提出了一种低功耗、无CORDIC的数字极性发射机，采用1比特Delta-Sigma调制（DSM）的功率放大器（PA），支持256-QAM调制。该设计避免了传统数字正交发射机中的IQ失配和占空比误差问题，同时通过无CORDIC架构降低了功耗和复杂度。

💡 主要创新点

• 提出无CORDIC的数字极性发射机架构，消除了坐标旋转数字计算机（CORDIC）模块，降低了功耗和面积。
• 采用1比特DSM（Delta-Sigma调制）的功率放大器，实现了高效率和高线性度，支持256-QAM高阶调制。
• 通过数字极性架构避免了IQ失配和占空比误差，提升了发射机性能。

🏷 关键词

📄 原文摘要

Dingxin Xu, Waleed Madany, Ashbir Aviat Fadila, Wenqian Wang, Yuang Xiong, Daxu Zhang, Garry Pranata Kusuma, Hiroyuki Sakai, Kazuaki Kunihiro, Atsushi Shirane, Kenichi Okada Institute of Science Tokyo, Tokyo, Japan CMOS digital transmitters (TXs) with integrated switching-mode digital power amplifiers (PAs) are becoming increasingly popular since they benefit from the Moore’s Law and demonstrate high power efficiency [1-12]. Digital quadrature TXs offer a simple system architecture but suffer from issues like IQ mismatch and duty-cycle errors [13-18]. In contrast, digital polar TXs avoid these problems and can achieve high power efficiency. However, they require a COordinate Rotation DIgital Computer (CORDIC) to convert baseband I/Q signals into polar coordinates, consisting of amplitude-modulated (AM) and phase-modulated (PM) signals [19-23]. The CORDIC-based signal conversion is non-linear,

👥 作者与机构

Yuncheng Zhang, Zezheng Liu, Duo Li, Minzhe Tang, Yi Zhang, Hongye Huang,