A Low-Power OFDM-Based Wake-Up Mechanism for IoE Applications

被引：16

作者：

Zhang, Hualei ^{[1
]}

Li, Chunhui ^{[1
]}

Chen, Sizheng ^{[1
]}

Tan, Xi ^{[1
]}

Yan, Na ^{[1
]}

Min, Hao ^{[1
]}

机构：

[1] Fudan Univ, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2018年 / 65卷 / 02期

关键词：

Wake-up; OFDM; transmitter; AM modulation; envelope detector; IEEE; 802.11ah; Internet of Everything (IoE);

D O I：

10.1109/TCSII.2017.2678680

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This brief presents a wake-up mechanism for orthogonal frequency division multiplexing (OFDM) modulation-based systems by coding a low data-rate wake-up signal in transmitter without extra circuitry overhead. It is achieved by controlling data pattern for each OFDM subcarrier in one symbol of frame to produce an equivalent amplitude-modulated (AM) signal as a wake-up query without contaminating protocol integrity. A low-power wake-up receiver is used to demodulate this signal and interpret the wake-up query. A system using proposed wake-up mechanism has been built based on IEEE 802.11ah standard. Measurement results demonstrate that an AM-type wake-up signal with a data-rate of 31.25 Kb/s is generated through the proposed method. Moreover, an envelope detector with -35-dBm sensitivity at 900 MHz has been implemented in 0.13-mu m CMOS technology for wake-up signal detection and consumes 120-nW power.

引用

页码：181 / 185

页数：5

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