FEC in cognitive multi-user OFDMA

Details FEC in cognitive multi-user OFDMA FEC in cognitive multi-user OFDMA

2011-04-19

2011-04-19

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S295000, C375S316000

Reexamination Certificate

active

07929623

ABSTRACT:
A multiuser scheme allowing for a number of users, sets of user, or carriers to share one or more channels is provided. In the invention, the available channel bandwidth is subdivided into a number of equal-bandwidth subchannels according to standard OFDM practice. A transmitter transmits data on a set of OFDM subchannels that need not be contiguous in the spectrum or belong to the same OFDM channel. A receiver receives and decodes the data and detects errors on subchannels. The receiver then broadcasts the identity of those subchannels on which the error rate exceeds a specific threshold, and the transmitter may select different subchannels for transmission based on this information.

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