Title :
A 915 MHz SAW Sensor Correlator System
Author :
Kozlovski, Nikolai Y. ; Malocha, Donald C. ; Weeks, Arthur R.
Author_Institution :
Coll. of Electr. Eng. & Comput. Sci., Univ. of Central Florida, Orlando, FL, USA
Abstract :
Previous work has been presented on passive wireless surface-acoustic-wave (SAW) sensors using the orthogonal frequency coding (OFC) technique (Malocha et ah, Proc. Int. Soc. Opt. Eng. (SPIE), Aug. 23-27,2004, vol. 2, pp. 1082-1085), Pavlina et al., Proc. IEEE Int. Conf. RFID, 2009, pp. 110-115). This paper will present a SAW sensor correlator system and its key operational parameters. Description of the radio frequency (RF) transceiver system and the OFC SAW temperature sensors is provided for parameter characterization. The system is based on a software radio approach and an analysis of the analog-to-digital converter (ADC) parameters and receiver noise in temperature extraction is presented. Initial experimental results for a four-sensor system operating over a 280°C range are given.
Keywords :
code division multiple access; correlation methods; radio transceivers; surface acoustic wave sensors; SAW sensor; analog to digital converter parameters; correlator system; frequency 915 MHz; orthogonal frequency coding technique; parameter characterization; passive wireless surface acoustic wave sensors; radio frequency transceiver system; receiver noise; software radio approach; temperature extraction; Receivers; Signal to noise ratio; Surface acoustic waves; Temperature measurement; Temperature sensors; Code-division multiple-access (CDMA); correlator; interrogator; orthogonal frequency coding (OFC); passive; sensor; spread spectrum; surface-acoustic-wave (SAW); wireless;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2011.2159856
