Pulse or digital communications – Transmitters – Quadrature amplitude modulation
Reexamination Certificate
2005-12-06
2005-12-06
Ghebretinsae, Temesghen (Department: 2637)
Pulse or digital communications
Transmitters
Quadrature amplitude modulation
C375S295000, C375S130000, C714S752000
Reexamination Certificate
active
06973140
ABSTRACT:
The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.
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Hoffman John E.
Nelson, Jr. George Rodney
Proctor, Jr. James A.
Riley Daniel I.
Rouphael Antoine J.
Ghebretinsae Temesghen
Hamilton Brook Smith & Reynolds P.C.
IPR Licensing Inc.
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