Appeal No. 2000-0519
Application 08/800,627
converted into serial data and then into parallel data for
transmission by OFDM. The repeated signals in the waveforms
just become data spread out over the carriers in some
unknown way and no longer be a repeated pattern. What is
necessary is adjusting the weighting coefficients c of the
k
M orthogonal carriers so they are fixed on N successive
periods as disclosed in the specification, page 4, line 22
to page 5, line 2. That is, the carriers act as radar
pulses. Claim 1 requires "an encoded waveform, from a
multicarrier signal, repeated on at least N periods, N being
greater than or equal to 1, wherein said multicarrier signal
is an orthogonal frequency divisional multiplexed (OFDM)
signal with orthogonal carriers," which requires the
multicarrier signal to be encoded (impliedly by selection of
the coefficients) and repeated; claim 9 contains a similar
limitation. There is no reasoning why it would have been
obvious to encode the OFDM signal of Hulyalkar by keeping
the coefficients invariant for at least two successive
periods in view of Hershey and Griffiths. The issue is not
simply whether it would have been obvious to use a known
alternative type of television transmission scheme such as
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