Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2002-06-03
2008-08-26
Deppe, Betsy L (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S260000, C370S206000, C370S207000
Reexamination Certificate
active
07418049
ABSTRACT:
A method and apparatus for decoding baseband OFDM signals include processing that begins by slicing each sub-carrier signal of the OFDM signal into a plurality of error terms. The particular number of error terms generated for each sub-carrier signal depends on the constellation size of the data being carried by each of the sub-carrier signals. The error terms for each sub-carrier signal corresponds to the nearest constellation point having a zero or one in the I or Q direction. The process continues by grouping individual error terms of the plurality of error terms for each sub-carrier signal to produce a plurality of error terms. The processing then continues by de-interleaving each of the plurality of error term groups to produce a corresponding plurality of de-interleaved error term groups. The processing then continues by interpreting the plurality of de-interleaved error term groups to produce a plurality of data values, each of the data values corresponds to data encoded within each of the sub-carrier signals.
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Deppe Betsy L
ViXS Systems Inc.
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