Title :
A statistical model of passive remote SAW sensing employing differential phase measurement
Author :
Shmaliy, Yuriy ; Ibarra-Manzano, Oscar ; Rojas-Laguna, Roberto
Author_Institution :
FIMEE, Guanajuato Univ., Salamanca, Mexico
Abstract :
A statistical analysis is given of the limiting estimate errors of the time delay (phase difference) between two reflectors of the passive wireless surface acoustic wave (SAW) sensor with single differential phase measurement. Rigorous and approximate solutions for the mean and mean square errors along with the error probability for the estimate to exceed a threshold are studied in detail. The errors are estimated in a wide range of signal-to-noise ratios and thresholds. Practical recommendations for designers of remote SAW sensor interrogating systems are also given.
Keywords :
delay estimation; error statistics; mean square error methods; phase measurement; surface acoustic wave sensors; SAW sensor; differential phase measurement; error probability; interrogating systems; limiting estimate errors; mean square errors; passive remote SAW sensing; passive wireless surface acoustic wave sensor; signal-to-noise ratios; statistical analysis; time delay; Acoustic sensors; Acoustic waves; Delay effects; Delay estimation; Mean square error methods; Phase estimation; Phase measurement; Statistical analysis; Surface acoustic waves; Wireless sensor networks;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418096
