Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Patent
1996-05-31
1999-06-01
Olms, Douglas W.
Multiplex communications
Communication over free space
Combining or distributing information via code word channels...
370468, 370914, 375200, 371 432, H04B 7216
Patent
active
059094346
ABSTRACT:
A novel and improved method and apparatus for generating a constant data rate channel supporting signaling data transmission in an adjustable rate wireless communication system is described. In accordance with one aspect of the invention the rate at which the channel operates may be adjusted based on the particular use and environmental conditions such that the appropriate data rate up to a maximum capability can be achieved. User data is then placed into frames based on the selected rate. When available, signaling data is added into each frames in a predetermined amount. The resulting frame is encoded, repeated and punctured based on the selected rate and whether signaling data has been introduced, and transmitted via RF signals to the receive system. Upon reception, the frame is processed in accordance with having only user data and with having signaling data. That is, the frame is processed both as if it had signaling data and as if no signaling data were present. Once the frame is processed, the particular processing that is more likely to be correct is determined via error checking. If the signaling data processed frame is more likely to have be correct, the signaling data is separated from the user data and each processed accordingly. If the non-signaling data processing is determined to be more likely to be correct, the frame is processed as if it were entirely comprised of user data.
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Butler Brian K.
Odenwalder Joseph P.
Tiedemann Jr. Edward G.
Zehavi Ephraim
Greenhaus Bruce W.
Miller Russell B.
Olms Douglas W.
Qualcomm Incorporated
Rao Seema S.
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