Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2002-04-09
2009-06-23
Perilla, Jason M. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S150000, C375S152000, C375S130000, C375S140000
Reexamination Certificate
active
07551663
ABSTRACT:
Combinations of correlation results are used to achieve detection of multiple coded signals at a receiver in a wireless communications system. The code applied to signals includes a lower rate code and a higher rate code. The lower rate code is a nested or tiered code such that it comprises at least two code sequences of the higher rate code. The received coded signal is correlated with the higher rate code using a single higher rate correlator to provide a higher rate code correlation result. The higher rate code correlation results are fed to two or more lower rate code correlators that combine multiple higher rate code correlation results, each using a different lower rate code, to provide corresponding lower rate code correlation results. The presence of at least one coded signal or mutually exclusive coded signals can be determined from the lower rate code correlation results.
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Third Generation P
IPR Licensing Inc.
Perilla Jason M.
Volpe and Koenig PC
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