A 2GHz 52µW Wake-Up Receiver with -72dBm Sensitivity Using Uncertain-IF Architecture

📋 论文概要

本文提出一种采用不确定中频（Uncertain-IF）架构的2GHz唤醒接收机，功耗仅52μW，灵敏度达-72dBm，解决了无线传感器网络中始终开启的唤醒接收机功耗过高的问题。通过创新的架构设计，在极低功耗下实现了足够的灵敏度和选择性。

💡 主要创新点

• 提出不确定中频（Uncertain-IF）架构，避免高功耗的本地振荡器和混频器，实现超低功耗接收。
• 在52μW功耗下达到-72dBm灵敏度，同时保持低功耗与性能的平衡。
• 针对无线传感器网络场景优化，将唤醒接收机功耗降低至系统可接受的50μW级别，显著提升网络能效。

🏷 关键词

📄 原文摘要

A wake-up receiver (WuRx) is used in wireless sensor networks (WSN) to detect wireless traffic directed to a node’s receiver and activate it upon detection, improving network latency and energy dissipation by maximizing data transceiver sleep time. The always-on nature of the WuRx sets a power dissipation floor for the entire system. In realistic WSN scenarios, the adoption of a WuRx leads to energy savings only if it can be realized with about 50µW of power dissipation [1], testing the limits of low-power receiver design. While diode detectors provide for the simplest detector structure, such receivers are strongly gain-limited due to the thresholding effect of the nonlinear detector [2] and adding gain at RF to improve sensitivity only increases power consumption. A more attractive approach is to adopt a heterodyne architecture, where the extra gain needed for robust energy detection can be

👥 作者与机构

Nathan M. Pletcher, Simone Gambini, Jan M. Rabaey

University of California, Berkeley, CA