Appeal 2007-0759
Application 10/177,732
that Siala does not solve a set of linear equations to estimate the channel (Br.
6; Reply Br. 4 and 5).
We hereby sustain the nonstatutory subject matter rejection, and
reverse the prior art rejections.
ISSUE (1)
Is the claimed method of estimating a channel directed to statutory
subject matter under 35 U.S.C. § 101?
FINDINGS OF FACT (1)
According to Appellant’s disclosure, the first step of employing one
or more basis functions that describe said channel based on statistics of the
channel is determined by solving a Karhunen-Loeve expansion algorithm
(Specification 2). The step of employing one or more waveforms that are
matched to the channel uses Slepian mathematical sequences or similar
sequences (Specification 2). The step of solving linear equations to estimate
the channel is performed by solving channel estimation coefficient equations
(Specification 8 to 13). After solving the algorithms and equations, the
result can be used as one of the inputs to the multiplexer 430 in the
transmitter (Figure 4).
PRINCIPLE OF LAW (1)
A method or process claim that applies a mathematical algorithm to
“produce a useful, concrete, tangible result without pre-empting other uses
of the mathematical principle, on its face the claimed process comfortably
falls within the scope of § 101.” AT&T Corp. v. Excel Communications,
Inc., 172 F.3d 1352, 1358, 50 USPQ2d 1447, 1452 (Fed. Cir. 1999).
3
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