A 2.4GHz 830pJ/bit Duty-Cycled Wake-Up Receiver with -82dBm Sensitivity for Crystal-Less Wireless Sensor Nodes

📋 论文概要

该论文提出了一种2.4GHz占空比循环唤醒接收器，通过非相干能量检测和宽带-IF超外差架构结合脉冲位置调制，实现了对低精度频率参考的鲁棒性，从而支持无晶振的无线传感器节点。该接收器在-82dBm灵敏度下仅消耗830pJ/bit能量。

💡 主要创新点

• 采用低精度频率参考实现无晶振操作，降低了无线传感器节点的成本。
• 结合宽带-IF超外差架构与非相干能量检测及PPM IR调制，增强了对频率误差的鲁棒性。
• 实现了高灵敏度（-82dBm）和超低能耗（830pJ/bit）的占空比循环接收器。

🏷 关键词

📄 原文摘要

Lucien J. Breems1, Kofi A. A. Makinwa3, Bram Nauta2 1 NXP Semiconductors, Eindhoven, Netherlands University of Twente, Enschede, Netherlands 3 Delft University of Technology, Delft, Netherlands 2 This paper describes a 2.4GHz Wake-up Receiver (WuRx) designed to operate with low-accuracy (<0.5%) frequency references [1], enabling crystal-less and thus low-cost wireless sensor nodes (WSNs). Robustness to frequency error is achieved by combining non-coherent energy detection with a broadband-IF superheterodyne architecture, and by using a pulse-position-modulated (PPM) impulse radio (IR) modulation scheme [2]. The Rx front-end and the LO generator are duty-cycled at pulse level, thereby reducing the power consumption to less than 420µW, which is more than adequate for use in WSNs [2]. PPM-IR also enables the realization of an interferer-robust receiver without the use of bulky off-chip RF filters [3,4]. This 65nm CMOS fully integrated WuRx employs a dutycycled LO generator and achieves a

👥 作者与机构

Salvatore Drago1,2, Domine M. W, Leenaerts1, Fabio Sebastiano1,3,