Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-10-02
2007-10-02
Burd, Kevin (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S343000
Reexamination Certificate
active
10406152
ABSTRACT:
The invention relates to a method, a processing unit and a system for determining the correlation between samples of a received code modulated signal and samples of replica code sequences. In order to simplify and accelerate the process, it is proposed that the received samples and the replica samples are aligned to each other and that the positions of the samples in the received signal and in the replica code sequences are grouped, each group comprising all positions at which the composition of the values of the samples of all of the replica code sequences is similar. The values of the received samples which are associated to a respective group are combined separately for each group to obtain a respective preliminary result. Then, a correlation value is determined for each replica code sequence by combining the preliminary results obtained for all groups separately for each replica code sequence, taking into account the values of the samples of the replica sequences in the respective group.
REFERENCES:
patent: 6055899 (2000-05-01), Feit et al.
patent: 6366938 (2002-04-01), Levison et al.
patent: 6831956 (2004-12-01), Schmidl et al.
Burd Kevin
Nokia Siemens Network Oy
Ware Fressola Van Der Sluys & Adolphson LLP
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