Determining the correlation between received samples and available replica samples
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United States of America Patent
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Sep 18, 2007
Grant Date -
Oct 7, 2004
app pub date -
Apr 1, 2003
filing date -
Apr 1, 2003
priority date (Note) -
Expired
status (Latency Note)
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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.
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