AM-FM hybrid signal communicated to RFID tags

Details AM-FM hybrid signal communicated to RFID tags AM-FM hybrid signal communicated to RFID tags

2005-07-19

2009-08-04

Pham, Tuan A (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Single message via plural modulation of single carrier

C455S041100, C455S106000, C455S108000, C455S023000, C340S854600, C340S855400, C340S855700

Reexamination Certificate

active

07570920

ABSTRACT:
An AM-FM hybrid signal is created which may be used to communicate simultaneously with both RFID tags that receive AM signals and wireless devices that receive FM or PM signals. The AM-FM hybrid signal may be fed back into the system's receiver at the local oscillator in order to recover the RFID tag's FM response, thus enabling simultaneous reception and decoding of both RFID tag FM response and FM wireless device response.

REFERENCES:
patent: 5396484 (1995-03-01), Itoh
patent: 5995019 (1999-11-01), Chieu et al.
patent: 2005/0058292 (2005-03-01), Diorio et al.

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