Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2008-04-28
2011-12-13
Moe, Aung S (Department: 2474)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S208000, C370S281000, C370S295000, C370S310200, C370S480000, C455S112000, C455S216000, C455S404200, C455S422100, C455S440000, C455S441000, C455S456100, C455S457000, C340S988000, C340S989000, C340S991000, C340S992000, C340S993000, C342S450000, C342S451000, C342S453000, C342S463000, C342S464000, C342S465000
Reexamination Certificate
active
08077659
ABSTRACT:
Estimating a current location of a receiver in a MediaFLO™ (Forward Link Only) mobile multimedia multicast system comprises receiving digital signals comprising a MediaFLO™ superframe comprising orthogonal frequency division multiplexing (OFDM) symbols; performing slot3processing of each medium access control (MAC) time unit of a data channel to identify a transmitter identity (TxID) of each transmitter; identifying corresponding geographical coordinates of each TxID; regenerating the digital signals for each of the transmitters using a local-area differentiator (LID) and a wide-area differentiator (WID) of the transmitters; dividing the digital signals by the corresponding regenerated transmitted signal to obtain channel estimates between the receiver and the corresponding transmitters; detecting a first peak in the channel estimates to determine a distance between the receiver and the corresponding transmitters; calculating a time difference of arrival of the digital signals; and estimating a current location of the receiver.
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Chung Hoon J
Moe Aung S
Newport Media, Inc.
Rahman LLC
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