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A GSM-Based Clock-Harvesting Receiver With –87 dBm Sensitivity for Sensor Network Wake-Up Jonathan K. Brown , Member , IEEE, and David D. Wentzloff , Member , IEEE
一种基于GSM的时钟采集接收器，用于无线传感器网络唤醒，灵敏度达-87 dBm。
0.13 μm CMOS, -87 dBm灵敏度, 126 μW活动功耗, 81 pW睡眠功耗
GSM时钟采集唤醒接收器无线传感器网络低功耗
▸创新点1：时钟采集接收器设计（方法创新） - 提出了一种新型的时钟采集接收器架构，通过从GSM信号中提取21 Hz时钟信号，实现了极低功耗的唤醒机制，适用于无线传感器网络。该设计在0.13微米CMOS工艺下实现，显著降低了同步能耗。
▸创新点2：从GSM信号中提取21 Hz时钟（电路创新） - 设计了高效的时钟提取电路，能够从1900 MHz GSM频段中精确提取21 Hz时钟信号，灵敏度达到-87 dBm，抖动仅为57秒，为传感器网络提供了高精度的同步时钟源。
▸创新点3：极低功耗睡眠模式（系统创新） - 实现了81皮瓦的超低功耗睡眠模式，大幅延长了传感器网络的电池寿命。该模式通过智能 duty-cycling 技术优化能耗，适用于长期部署的无线传感器应用。
▸创新点4：高灵敏度与低抖动性能（性能创新） - 接收器在激活模式下仅消耗126微瓦功率，同时保持-87 dBm的高灵敏度和57秒的低抖动，为无线传感器网络提供了可靠的信号接收和同步性能。
Abstract
This paper presents a new type of wake-up receiver, called a clock-harvesting receiver, which extracts a 21 Hz clock em- bedded within the GSM standard for the wake-up of a wireless sensor network. The recei ver was fabricated in 0.13 mC M O S and harvests a 21 Hz clock from the 1900–MHz GSM band. It was designed for heavily duty-cyc led operation to reduce the en- ergy required for synchronization of a network. In active mode, the receiver achieves a sensitivity of 87 dBm with 57 s of jitter while consuming 126 W. In sleep mode, the power consumption is 81 pW. Experiments conducted in the lab verify the functionality of the receiver with a real local GSM cellular signal.