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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Barton, R.J. |
| Copyright Year | 2012 |
| Description | Author affiliation: NASA Johnson Space Center, 2101 NASA Parkway, Houston, TX 77058 (Barton, R.J.) |
| Abstract | Remote sensing is a critical application that supports activities such as environmental monitoring, planetary science, structural shape and health monitoring, non-destructive evaluation, etc. that are critical to many NASA missions. The utility of the remote sensing devices themselves is greatly increased if they are "passive" — that is, they do not require any on-board power supply such as batteries — and if they can be identified uniquely during the sensor interrogation process. In this paper, we consider one very promising passive sensor technology, called surface acoustic wave (SAW) radio-frequency identification (RFID), that satisfies these criteria. Although SAW RFID tags have great potential for use in numerous space-based remote sensing applications, the limited collision resolution capability of current generation tags limits the performance in a cluttered sensing environment. That is, as more SAW-based sensors are added to the environment, numerous tag responses are superimposed at the receiver and decoding all or even a subset of the telemetry becomes increasingly difficult. Background clutter generated by reflectors other than the sensors themselves is also a problem, as is multipath interference and signal distortion, but the limiting factor in many remote sensing applications can be expected to be tag mutual interference. In this paper, we present the results of a research effort aimed at providing answers to the following questions: • What are the fundamental relationships between tag parameters such as bit-rate, time-bandwidth-product, SNR, and achievable collision resolution? • What are the differences in optimal or near-optimal interrogator designs between noise-limited environments and interference-limited environments? • What are the performance characteristics of different interrogator designs in term of parameters such as transmitter power level, range, and number of interfering tags? |
| Starting Page | 1 |
| Ending Page | 16 |
| File Size | 1699887 |
| Page Count | 16 |
| File Format | |
| ISBN | 9781457705564 |
| ISSN | 1095323X |
| e-ISBN | 9781457705571 |
| DOI | 10.1109/AERO.2012.6187216 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-03-03 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Signal to noise ratio Surface acoustic waves Temperature measurement Equations RFID tags Remote sensing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Aerospace Engineering Space and Planetary Science |
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