An active tagging system using circular-polarization modulation
| Autor: | Roland Küng, W. Biichtokd, Marcel Kossel, H. Benedickter |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
RFID
Modulation Radiation Analog transmission Computer science ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Jamming Condensed Matter Physics Frequency-hopping Delta modulation Pulse-amplitude modulation Pulse-position modulation Electronic engineering 004: Informatik Demodulation Frequency-hopping spread spectrum Electrical and Electronic Engineering Microwave 621.3: Elektrotechnik und Elektronik Multipath propagation |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 47:2242-2248 |
| ISSN: | 0018-9480 |
| DOI: | 10.1109/22.808966 |
| Popis: | An active read/write microwave tagging system using circular-polarization modulation as a novel modulation scheme for radio-frequency identification systems is presented. The proposed modulation scheme reduces demodulation complexity and power consumption on the battery-powered tag. Additional coding of the circular-polarization modulated data reduces transmission errors due to polarization inversion at multipath propagation. In multiple-reader environments, the main jamming threat occurs from power carriers of different interrogators. A combination of circular-polarization modulation and frequency hopping is presented that shows an increased immunity against multipath phenomena for multiple-tag and multiple-reader environments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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