A Highly-Integrated 6-Phase Cell-Reused Digital Transmitter Using 1/3 Duty-Cycle LO Signals for Harmonic Rejection

📋 论文概要

该论文提出一种高度集成的6相单元复用数字发射机，通过采用1/3占空比本振信号实现谐波抑制，解决了传统数字发射机在输出功率、效率和线性度方面的瓶颈。该架构能够直接与数字基带接口，适用于宽带OFDM和高阶调制信号。

💡 主要创新点

• 采用6相架构和单元复用技术，显著减少芯片面积和功耗，提升集成度。
• 利用1/3占空比本振信号实现谐波抑制，改善发射机的线性度和频谱纯度。
• 实现高度数字化设计，简化与数字基带的接口，提升整体系统效率。

🏷 关键词

📄 原文摘要

technologies, it is desirable to completely digitize the transmitter, which yields reduced die area, highly efficient operation and direct interface to digital baseband. However, the ever-increasing data demand with complex OFDM and wideband high-order modulation poses great challenges on transmitter output power, efficiency and linearity. The quadrature and polar digital transmitters (DTXs) are two types of widely-used architectures: the quadrature DTX is suitable for wideband signals but the orthogonal vector combination limits output power and efficiency [1,2]; the polar DTX has advantages of high output power and efficiency, but it requires extra design complexity of phase modulators and AM-PM synchronization [3,4]. Moreover, the switch-based digital power amplifier (DPA) driven by square-wave LOs will generate

👥 作者与机构

Jiaxiang Li*1, Zimu Li*1, Yun Yin1, Changgu Yan1, Nan Qi2, Ming Liu1, Hongtao Xu1

Fudan University, Shanghai, China Chinese Academy of Sciences, Beijing, China *Equally Credited Authors (ECAs) 1 2 To fully benefit from advanced CMOS