Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-09-18
2007-09-18
Burd, Kevin (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S343000
Reexamination Certificate
active
10404931
ABSTRACT:
The invention relates to a method, a processing unit and a system for determining the correlation between consecutive sets of samples of a received, code modulated signal and replica samples. In order to reduce the computational load, the positions of samples in said replica code sequence are grouped, each of these positions and a predetermined number of respective subsequent positions forming a subgroup and each group comprising the respective first position of all subgroups with positions associated with a similar composition of consecutive replica samples. The method combines those values of samples of the first set of samples, which are associated by their position to a respective group, separately for each group to obtain a respective preliminary result. Determining a correlation value for each of the sets of samples then comprises combining the obtained preliminary results for all groups separately for each of the sets of samples.
REFERENCES:
patent: 6005899 (1999-12-01), Khayrallah
patent: 6366938 (2002-04-01), Levison et al.
patent: 6831956 (2004-12-01), Schmidl et al.
patent: PCT/IB02/04420 (2002-10-01), None
patent: WO2004/038944 (2004-05-01), None
Burd Kevin
Nokia Siemens Networks Oy
Ware Fressola Van Der Sluys & Adolphson LLP
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