Parallel RFID system using CDMA

Details Parallel RFID system using CDMA Parallel RFID system using CDMA

2006-03-23

2011-10-25

Zimmerman, Brian (Department: 2612)

Communications: electrical

Selective

Interrogation response

Reexamination Certificate

active

08044773

ABSTRACT:
Various embodiments of the invention may use code division multiple access (CDMA) technology in communications from radio frequency identification (RFID) tags to RFID readers, so that multiple RFID tags may respond to the same RFID reader at the same time on the same frequency and still be reliably decoded by the RFID reader. In some embodiments, orthogonal CDMA PN sequences for the RFID tags to use in creating their responses may first be transmitted to those RFID tags, possibly using a non-CDMA technique.

REFERENCES:
patent: 5606322 (1997-02-01), Allen et al.
patent: 5677927 (1997-10-01), Fullerton et al.
patent: 5940006 (1999-08-01), MacLellan et al.
patent: 5943361 (1999-08-01), Gilhousen et al.
patent: 6667708 (2003-12-01), Schooler et al.
patent: 6912211 (2005-06-01), Gerakoulis
patent: 7023817 (2006-04-01), Kuffner et al.
patent: 7830948 (2010-11-01), Schaefer et al.
patent: 2002/0070845 (2002-06-01), Reisinger et al.
patent: 2002/0085520 (2002-07-01), Sydon et al.
patent: 2005/0231331 (2005-10-01), Kang
patent: 2005/0237159 (2005-10-01), Cooper et al.
patent: 2006/0125640 (2006-06-01), Oakes et al.
patent: 2007/0222560 (2007-09-01), Posamentier
patent: 2008/0036573 (2008-02-01), Tsukamoto et al.
patent: 2010/0214065 (2010-08-01), Maltseff et al.
U.S. Appl. No. 11/134,214, filed May 19, 2005—Posamentier—Directional Transmissions to Multiple Wireless Devices.

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