Appeal No. 2000-2253 Page 2
Application No. 08/798,137
A rate converter in a satellite converts signals between the carrier bandwidths. (Spec.
at 2.) The converter, however, adds weight, cost, and complexity to the satellite. (Id.)
In contrast, the appellant’s mobile telephone features two receiver paths and a
switch. In a Public Switched Telephone Network-to-mobile mode, the switch selects the
first receiver path to receive signals at a first carrier bandwidth (e.g., 200 kHz). In a
mobile-to-mobile mode, the switch selects the second receiver path to receive
unconverted signals at second carrier bandwidth (e.g., 50 kHz), without requiring
conversion to the first bandwidth. Because the mobile telephone can receive signals at
different carrier bandwidths, the appellant asserts that the associated satellite need not
include a rate converter. (Id. at 5.)
A further understanding of the invention can be achieved by reading the following
claim:
14. A communication device, comprising:
a first receiver path for receiving communication signals from a
satellite at a first carrier bandwidth in a first mode;
a second receiver path for receiving communication signals from
the satellite at a second carrier bandwidth in a second mode;
means for selecting between the first mode and the second mode
in response to control information.
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Last modified: November 3, 2007