Selection of transponder in response area of base station, for use in radio frequency identification applications, transmits arbitration symbol with carrier signal used to allocate time slots

摘要

Transponders are linked by a wireless duplex data transmission path. An electromagnetic carrier signal that also incorporates an arbitration symbol is transmitted. Each symbol has a response area. The transponders derive information from the symbol for modulation of a data signal with different time points for a reference time in the time domain for the modulated signal.