Title :
Error estimation in passive saw sensing with differential phase measurement
Author :
Shmaliy, Yuriy S.
Author_Institution :
Guanajuato Univ., Salamanca
Abstract :
We provide a statistical analysis of the limiting estimate errors of the time delay between two reflectors of the passive wireless surface acoustic wave (SAW) sensor with single differential measurement. The estimation is provided in a sense of the maximum likelihood function at the ideal coherent receiver in presence of Gaussian noise. 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 plots are applied to evaluate the errors in a wide range of signal-to-noise ratios and thresholds. Practical recommendations for designers of the remote SAW sensor interrogating systems are also given
Keywords :
Gaussian noise; delay estimation; error statistics; maximum likelihood estimation; mean square error methods; phase measurement; remote sensing; surface acoustic wave sensors; Gaussian noise; differential phase measurement; error estimation; error probability; ideal coherent receiver; maximum likelihood function; mean square errors; passive wireless SAW sensor; phase errors; probability density; reflectors; remote SAW sensor interrogating system; signal-to-noise ratios; statistical analysis; time delay; Acoustic measurements; Acoustic sensors; Acoustic waves; Delay effects; Delay estimation; Error analysis; Phase measurement; Statistical analysis; Surface acoustic waves; Wireless sensor networks;
Conference_Titel :
Laser and Fiber-Optical Networks Modeling, 2005. Proceedings of LFNM 2005. 7th International Conference on
Conference_Location :
Yalta, Crimea
Print_ISBN :
0-7803-9147-0
DOI :
10.1109/LFNM.2005.1553237
