US 9,813,115 B2
RF system using PR-ASK with orthogonal offset
Thomas J. Frederick, Chapel Hill, NC (US)
Assigned to Clairvoyant Technology LLC, Durham, NC (US)
Appl. No. 15/110,994
Filed by Clairvoyant Technology LLC, Durham, NC (US)
PCT Filed Dec. 4, 2014, PCT No. PCT/US2014/068484
§ 371(c)(1), (2) Date Jul. 12, 2016,
PCT Pub. No. WO2015/105600, PCT Pub. Date Jul. 16, 2015.
Claims priority of provisional application 61/926,568, filed on Jan. 13, 2014.
Prior Publication US 2016/0344452 A1, Nov. 24, 2016
Int. Cl. H03C 5/00 (2006.01); H04L 27/04 (2006.01); H04B 5/00 (2006.01); H04L 27/36 (2006.01)
CPC H04B 5/0031 (2013.01) [H04B 5/0062 (2013.01); H04L 27/367 (2013.01)] 18 Claims
OG exemplary drawing
 
16. Apparatus comprising:
means for determining a current polarity state for a stored offset phase reversal amplitude shift keying (OPR-ASK) waveform of a plurality of stored OPR-ASK waveforms, the stored OPR-ASK waveform corresponding to a radio frequency identification (RFID) symbol in a sequence of RFID symbols;
means for retrieving the stored OPR-ASK waveform in accordance with the current polarity state from the plurality of stored OPR-ASK waveforms, each stored waveform representing the RFID symbol usable in the sequence of RFID symbols; and
means for assembling the sequence of RFID symbols each based on the corresponding stored OPR-ASK waveform.