A Dual-Band Digital-WiFi 802.11a/b/g/n Transmitter SoC with Digital I/Q Combining and Diamond Profile Mapping for Compact Die Area and Improved Efficiency in 40nm CMOS

📋 论文概要

该论文提出了一种面向802.11a/b/g/n WiFi的双频段数字发射机SoC，通过数字I/Q合并和菱形轮廓映射技术实现了紧凑的芯片面积和高效率。解决了传统模拟发射机面积大、效率低的问题，适用于宽带无线通信。

💡 主要创新点

• 采用数字I/Q合并架构，消除了模拟混频器，降低了面积和功耗，支持宽带WiFi信号。
• 提出菱形轮廓映射技术，优化了功率放大器的开关波形，提升了发射机的线性度和效率。
• 实现了双频段（2.4GHz/5GHz）集成，单芯片支持多标准WiFi发射，减少了外部器件。

🏷 关键词

📄 原文摘要

Dimitris Papadopoulos1, Bryan Huang1, Ray Chen1, Hua Wang1, WH Hsu2, CH Wu2, Osama Shanaa1 MediaTek, San Jose, CA, MediaTek, Hsinchu, Taiwan 1 2 Digital transmitters (DTX) have gained interest in the past few years because of their potential to provide compact die area, better efficiency due to the switching nature of the power amplifier core, and scaling with CMOS technology [1-3]. Quadrature DTX architecture [1] is favored over polar [3] or outphasing [4] for wideband applications, such as WiFi, because of its ability to scale easily to higher signal bandwidth. Moreover, there is no need for a CORDIC block to convert I/Q signals to amplitude/phase signals [3], which results in large-signal bandwidth expansion, nor the need for very precise alignment [3,4] using fast digital circuits and excessive calibrations. However, the promised potential of quadrature DTX technology fell short of what has been expected because of the excessive parasitics at the TX output

👥 作者与机构

Zhiming Deng1, Eric Lu1, Edris Rostami1, Dai Sieh1,