Title :
Multichannel radar backscatter communication and localization
Author :
Cnaan-On, Itay ; Thomas, Stan J. ; Reynolds, Matthew S. ; Krolik, J.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Duke Univ., Durham, NC, USA
Abstract :
This paper concerns the use of wideband RF backscatter from semi-passive RF tags for energy-efficient wireless telemetry. Using LFM (Linear Frequency Modulated) signals from a radar base station, we present a method for joint ranging and communications with a distributed set of sensor nodes. Backscatter signaling from each node results in modulation on a sub-carrier frequency determined by the node distance from the radar. Upper bounds on communications rate per coverage area are presented, as well as clutter filtering to suppress ground components. Experimental results from a brass-board microwave system in an indoor environment are presented and discussed.
Keywords :
FM radar; backscatter; filtering theory; frequency estimation; interference suppression; microwave propagation; radar signal processing; sensor placement; telemetry; LFM; brass-board microwave system; clutter filtering; energy efficient wireless telemetry; ground component suppression; indoor environment; joint ranging and communication; linear frequency modulation; multichannel radar backscatter communication; radar base station; semi-passive RF tags; sensor localisation; sensor node; subcarrier frequency determination; upper bounds; wideband RF backscatter signaling; Backscatter; Chirp; Clutter; Conferences; Radar; Radio frequency; Radiofrequency identification; localization; microwave communication; radar communication; radio frequency identification;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2014 IEEE International Conference on
Conference_Location :
Florence
DOI :
10.1109/ICASSP.2014.6853561
