Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-01-30
2007-01-30
Nguyen, Brian (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S344000
Reexamination Certificate
active
10191221
ABSTRACT:
A Baseband transmitter for a radio frequency (RF) communication device according to an embodiment of the present invention includes a single-carrier processor, a pulse shape filter, a multi-carrier processor and a signal combiner. The single-carrier processor generates a single-carrier signal at a first sample rate. The pulse shape filter includes multiple polyphase filters which filter the single-carrier signal according to a time shaping pulse that approximates a multi-carrier power spectrum and a sample switch that selects outputs of the polyphase filters at a second sample rate. The multi-carrier processor generates a multi-carrier signal at the second sample rate. The signal combiner combines the filtered single-carrier signal with the multi-carrier signal while maintaining phase, gain, frequency and timing alignment.
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Seals Michael J.
Webster Mark A.
Conexant, Inc.
Nguyen Brian
Thomas Kayden Horstemeyer & Risley
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