Error estimation in passive SAW sensing with differential phase measurement

被引：0
|
作者：
Shmaliy, YS [1 ]
机构：
[1] Univ Guanajuato, FIMEE, Salamanca 36730, Gto, Spain
来源：
LFNM 2005: 7TH INTERNATIONAL CONFERENCE ON LASER AND FIBER-OPTICAL NETWORKS MODELING | 2005年
关键词：
passive SAW sensing; phase errors; probability density;
D O I：
10.1109/LFNM.2005.1553237
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
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页码：244 / 251
页数：8
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