An Ultra-Low-Power Receiver Using TransmittedReference and Shifted Limiters for In-Band Interference Resilience

📋 论文概要

该论文提出了一种超低功耗接收机，采用传输参考和移位限幅器技术，以增强对带内干扰的抵抗能力，解决了无线传感器节点在ISM频段共存干扰下的设计难题。

💡 主要创新点

• 提出传输参考架构，避免使用高功耗的本地振荡器，降低功耗并减少相位噪声引起的互调干扰。
• 采用移位限幅器技术，有效抑制带内强干扰，提升接收机在恶劣环境下的线性度和鲁棒性。

🏷 关键词

📄 原文摘要

The coexistence of more and more wireless standards in the ISM bands increases the design difficulty of interference-robust receivers (RX), especially for Wireless Sensor Nodes because of their Ultra-Low-Power (ULP) budget. Superheterodyne receivers [1-3] are difficult to design for low power due to the challenges of generating a clean oscillator signal with low power. The phase noise of the LO leads to reciprocal mixing, and non-linearities and limited low-Q RF filtering make them vulnerable to in-band interferers, even when external passive components are used [2]. To circumvent accurate frequency generation, uncertain IF has been proposed [4], together with envelope detection. Alternatively, envelope detection can be done at RF to avoid frequency downconversion at all. However, selectivity is highly compromised in both cases, as the RX cannot distinguish between the signal and nearby interferers. By transmitting two tones [5], this

👥 作者与机构

Dawei Ye, Ronan van der Zee, Bram Nauta

University of Twente, Enschede, The Netherlands