Appeal No. 2002-1197
Application 09/131,167
Claim 17 is reproduced below.
17. A communications device, comprising:
an adaptive system configured to estimate a component
of a source signal,
wherein variables of said adaptive system are updated
only when a prevailing value of the source signal is within
a predetermined range of possible source signal values.
The examiner relies on the following references:
Haneda et al. (Haneda) 5,721,772 February 24, 1998
Koski 6,192,126 February 20, 2001
(filed May 28, 1998)
Claims 1-41 stand rejected under 35 U.S.C. § 103(a) as being
unpatentable over Koski and Haneda. The examiner finds that
Koski discloses the claimed subject matter except for the echo
estimate. The examiner finds that Haneda teaches providing an
echo estimate. The examiner concludes that it would have been
obvious to modify Koski to provide an echo estimate, in view of
the teachings of Haneda, to allow the echo component of the
source signal to be subtracted out.
We refer to the final rejection (Paper No. 12) (pages
referred to as "FR__") and the examiner's answer (Paper No. 18)
(pages referred to as "EA__") for a statement of the examiner's
rejection, and to the brief (Paper No. 17) (pages referred to as
"Br__") and reply brief (Paper No. 20) (pages referred to as
"RBr__") for a statement of appellant's arguments thereagainst.
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