Title :
Hybrid analog-digital backscatter platform for high data rate, battery-free sensing
Author :
Talla, V. ; Buettner, M. ; Wetherall, D. ; Smith, J.R.
Author_Institution :
Electr. Eng. Dept., Univ. of Washington, Seattle, WA, USA
Abstract :
This paper presents a hybrid analog-digital backscatter platform for high data rate battery free wireless sensing. A digital RFID platform (WISP) has been integrated with an analog sensor (microphone) to develop a digitally addressable RFID tag which uses analog backscatter for high data rate transmission of sensor data (audio). The hybrid WISP operates in two modes: digital mode (default mode) to transmit and receive digital data (as per EPC Gen 2 RFID protocol) and analog mode (activated by Gen 2 READ command) to backscatter audio sensor data. We report an operating range of more than 4 meters for the digitally addressable, battery free wireless audio sensor.
Keywords :
audio signal processing; microphones; radiofrequency identification; ubiquitous computing; RFID tag; analog mode; analog sensor; audio sensor data; data rate battery free wireless sensing; digital RFID platform; digital mode; hybrid WISP; hybrid analog-digital backscatter platform; microphone; pervasive computing; Backscatter; Impedance; Microphones; Protocols; Radio frequency; Radiofrequency identification;
Conference_Titel :
Wireless Sensors and Sensor Networks (WiSNet), 2013 IEEE Topical Conference on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-3104-3
Electronic_ISBN :
978-1-4673-2931-6
DOI :
10.1109/WiSNet.2013.6488614
