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Frequency Hopping
Frequency hopping is a technique used to keep two or more RFID readers from interfering with each other while reading RFID tags in the same area.
For example, UHF RFID readers in the United States are said to operate at 915 MHz. They actually operate between 902 and 928 MHz, jumping randomly (or in a predetermined sequence) to frequencies in between 902 and 928 MHz.
The chances of interference (of two readers attempting to interrogate the same tag) are small if the band of the reader is wide enough.
See also RFID reader collision.
(go to RFID articles)
Index of related articles:
Active Tag (Active RFID Tag)
Amplitude Modulation (AM)
Antenna (RFID Tag Antenna)
Anti-collision
Back scatter (RFID back scatter)
Bi-directional
Contactless smart card
Chipless RFID tag
Contactless Credit Cards
Closed Systems (or Closed Loop Systems)
Code plate (RFID code plate)
Continuous Wave (CM)
Electromagnetic Interference (EMI)
Electronic Article Surveillance (EAS)
Electronic Product Code (EPC)
Error Correcting Code (ECC)
Error Correcting Mode
Error Correcting Protocol
Excite
Factory Programming
Field Programming
Frequency Modulation (FM)
Frequency Shift Keyed Modulation (FSKM)
Frequency Hopping
Harvest
Inductive Coupling
Modulation
Passive RFID Tag (or Passive Tag)
Phase Modulation (PM)
Pulse Duration
RF Fibers
RFID Reader
RFID Tag Collision
RFID tag
Smart label (RFID Smart Label)
RFID Reader Collision
Smart cards
Transponder for RFID
