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Author : 袁祥程
Release : 2021
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Ultra-low-power Low-area Wake-up Receiver for IoT Applications by : 袁祥程
Download or read book Ultra-low-power Low-area Wake-up Receiver for IoT Applications written by 袁祥程. This book was released on 2021. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Po-Han Wang
Release : 2020
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Ultra-Low-Power and High-Sensitivity Wake-Up Receivers for IoT Applications by : Po-Han Wang
Download or read book Ultra-Low-Power and High-Sensitivity Wake-Up Receivers for IoT Applications written by Po-Han Wang. This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: Wireless communication circuits often dominate the power consumption of Internet of Things (IoT) devices such as small battery-powered commercial wearables or low-power-wide-area-network (LPWAN) environmental sensors for infrastructure. More specifically, a large fraction of this power comes from node-to-hub or node-to-node networking requirements, especially when such devices communicate with low-to-medium average throughput. To reduce this power, instead of duty-cycling the main receiver, employing an auxiliary wake-up receiver (WuRX) that monitors the RF spectrum for a pre-defined wake-up signature either continuously or in duty-cycle fashion has been proved to be an effective solution. In this thesis, WuRX designs targeting ultra-low-power and high sensitivity for different usage scenarios are investigated. First, a WuRX for emerging LPWAN applications targeting to be used with the always-on WuRX communication protocol is presented. This design explores architecture-level and circuit-level techniques to operate with near-zero power consumption while achieving high sensitivity. Moreover, an active and a passive envelope detector (ED) that employ pseudo-balun architectures are also proposed, which further improve sensitivity and enable operation at a higher frequency band. On the other hand, WuRXs for commercial applications targeting to be used primarily with the duty-cycled WuRX communication protocol while being compatible with well-established wireless standards are also presented. First, a Bluetooth Low Energy (BLE) WuRX achieves low power, high sensitivity, interference-resiliency, and standard-compatibility through a combination of communication and circuit techniques, including high-Q filtering by a bank of FBAR resonators and a frequency-hopped mixer-first RF front-end that responds to a 4-dimensional (4-D) wake-up signature. This work is then further enhanced to achieve higher sensitivity while maintaining comparable interference-resiliency and power without the off-chip FBAR filters for a fully integrated solution. More importantly, this enhanced design is the first dual-mode WuRX compatible with both BLE and Wi-Fi transmitters, thanks to a carefully architected frequency plan that supports BLE advertisement channel hopping or a proposed subcarrier-based within-channel Wi-Fi frequency hopping scheme. As a result, the presented WuRX designs could potentially help enable new wireless IoT applications, particularly those that have low-to-medium average throughput requirements.
Author : Maarten Lont
Release : 2014-05-28
Genre : Technology & Engineering
Kind : eBook
Book Rating : 509/5 ( reviews)
Book Synopsis Wake-up Receiver Based Ultra-Low-Power WBAN by : Maarten Lont
Download or read book Wake-up Receiver Based Ultra-Low-Power WBAN written by Maarten Lont. This book was released on 2014-05-28. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the cross-layer design and optimization of wake-up receivers for wireless body area networks (WBAN), with an emphasis on low-power circuit design. This includes the analysis of medium access control (MAC) protocols, mixer-first receiver design, and implications of receiver impairments on wideband frequency-shift-keying (FSK) receivers. Readers will learn how the overall power consumption is reduced by exploiting the characteristics of body area networks. Theoretical models presented are validated with two different receiver implementations, in 90nm and 40nm CMOS technology.
Author : Maarten Lont
Release : 2014-06-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 512/5 ( reviews)
Book Synopsis Wake-up Receiver Based Ultra-Low-Power WBAN by : Maarten Lont
Download or read book Wake-up Receiver Based Ultra-Low-Power WBAN written by Maarten Lont. This book was released on 2014-06-01. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the cross-layer design and optimization of wake-up receivers for wireless body area networks (WBAN), with an emphasis on low-power circuit design. This includes the analysis of medium access control (MAC) protocols, mixer-first receiver design, and implications of receiver impairments on wideband frequency-shift-keying (FSK) receivers. Readers will learn how the overall power consumption is reduced by exploiting the characteristics of body area networks. Theoretical models presented are validated with two different receiver implementations, in 90nm and 40nm CMOS technology.
Author : Mohamed Radwan Abdelhamid
Release : 2017
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Ultra Low Power, High Sensitivity Secure Wake-up Receiver for the Internet of Things by : Mohamed Radwan Abdelhamid
Download or read book Ultra Low Power, High Sensitivity Secure Wake-up Receiver for the Internet of Things written by Mohamed Radwan Abdelhamid. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt: Internet of Things (IoT) is emerging as the technology of the future where an estimate of billions of devices around us will be connected to the internet. When all of these sensors and nodes get connected to the cloud, a huge portion of their energy is consumed by their wireless communication systems. However, most of the sensors and nodes have a highly constrained power budget or even operate using a batteryless energy-harvesting scheme. With tons of data being transmitted through the IoT nodes, the specifications dictate an ultra low power design with secure communication. An ultra low power wake-up receiver integrated circuit is designed which can wake any node up using Bluetooth-LE. A new system level design methodology is introduced to map the higher level specifications to circuit level requirements with optimized duty cycling. A low power architecture is presented utilizing a mixer-first architecture along with a low power free-running oscillator. The system is designed to be highly programmable in order to track the local oscillator frequency variations through a cascade of reconfigurable filters along the receiver chain. While the whole system is optimized to be duty cycled in a scheme suitable for receiving the Bluetooth LE advertising packets, the local oscillator is also duty-cycled within the short interval of active operation in a harmonic rejection scheme for a 33% further power reduction. A prototype wake-up receiver with BLE compliance was designed using 65nm CMOS technology. The receiver correlates to a 32-bit reconfigurable wake-up pattern at a -90 dBm sensitivity using the advertising packets only without an actual connection. The system operates from a 0.7 V supply and consumes a 1 [mu]iW at a latency of a couple of seconds through incorporating an optimized system level duty cycling and within-bit duty cycling schemes. The power consumption can be be further scaled down to 400 nW or less at a latency of ten seconds or greater making it suitable for low power and low datarate IoT transceivers.
