Evaluating low power techniques for backscatter WiFi nodes

评估反向散射 WiFi 节点的低功耗技术

• 批准号: 530720-2018
• 负责人: ElSankary, Kamal
• 金额: $ 1.82万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=650138
• 关键词: Evaluating; low; power; techniques; backscatter

Wavelite technology is built upon the concept of backscatter communications, where wireless WiFi signals**emitted from a source can be reflected back by a Radio-frequency identification (RFID) like device. This**allows Internet of Things (IoT) devices to be very cost effective and widely deployable since it can benefit from**the already deployed WiFi infrastructure. To engage in a transmission the IoT node has first to sense the**presence of WiFi excitation signal and then it wakes up the modulation subsystem to transmit data. A key**component of backscattering IoT device is a wake-up receiver (WuR) that continuously monitors the power of**the WiFi signals and triggers a wakeup signal to the Wavelite transmitter.Driven by the fact that advanced IoT**devices have severe power constraints and life duration, the WuR has to consume power of less than hundred**micro-Watts. Also WuR has to have a high sensitivity to detect weaker signals, and increase the transmission**range. In addition a very compact form factor and low cost are important features in Wavelite products. Due to**the pressure of lower power and cost, a higher level of integration using CMOS (complementary**metal-oxide-semiconductor) technologies is needed. Due to the complexity of implementing wake up receiver**in CMOS technology, Wavelite needs assistance to study and develop this ultra-low power, high sensitivity**wake up receiver for their future IoT products.**The objective of this research project is to study and design of a new WuR architecture with ultra-low power**consumption (<100 micro-Watts) and high sensitivity (<-80dBm) for WiFi backscattering IoT applications.**These objectives include researching the existent available WuR architectures suitable for WiFi backscattering**IoT devices and deliver a comprehensive study on the best architecture that complies with Wavelite's**specifications. Propose and design, at circuit and layout levels using CMOS technology, a new fully integrated**WuR architecture to reduce power, cost and form factor.

Wavelite 技术建立在反向散射通信的概念之上，其中从源发出的无线 WiFi 信号**可以被射频识别 (RFID) 之类的设备反射回来。这**使得物联网 (IoT) 设备非常具有成本效益且可广泛部署，因为它可以从**已部署的 WiFi 基础设施中受益。为了进行传输，物联网节点首先必须感知 WiFi 激励信号的存在，然后唤醒调制子系统来传输数据。反向散射 IoT 设备的一个关键组件是唤醒接收器 (WuR)，它持续监控 WiFi 信号的功率并向 Wavelite 发射器触发唤醒信号。由于功率和寿命受到严格限制，WuR 的功耗必须低于百**微瓦。此外，WuR 必须具有高灵敏度才能检测较弱的信号，并增加传输**范围。此外，非常紧凑的外形和低成本也是 Wavelite 产品的重要特征。由于**较低功耗和成本的压力，需要使用 CMOS（互补**金属氧化物半导体）技术进行更高级别的集成。由于在 CMOS 技术中实现唤醒接收器**的复杂性，Wavelite 需要帮助来研究和开发这种超低功耗、高灵敏度**唤醒接收器，用于其未来的物联网产品。**该研究项目的目标是研究和设计一种新的WuR架构，该架构具有超低功耗**消耗（<100微瓦）和高灵敏度（<-80dBm），适用于WiFi反向散射物联网应用。**这些目标包括研究适合的现有可用WuR架构用于无线网络反向散射**物联网设备，并对符合 Wavelite **规范的最佳架构进行全面研究。使用 CMOS 技术在电路和布局级别提出和设计一种新的完全集成**WuR 架构，以降低功耗、成本和外形尺寸。