Spreading code estimating apparatus and spreading code estimating method
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United States of America Patent
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Nov 26, 2002
Grant Date -
N/A
app pub date -
Jan 20, 1999
filing date -
Jan 28, 1998
priority date (Note) -
Expired
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Abstract
A preliminary selection averaging section 105 averages a small number of correlation values, a candidate code selecting section 106 selects some spreading codes, each having a high average correlation value, as candidates of a real spreading code, an actual selection averaging section 107 performs the averaging the correlation values of the respective candidate codes by use of the number of correlation values necessary for sufficiently restraining noise, and a maximum value detecting section 108 estimates a spreading code, having a maximum correlation value, as a real spreading code. Thereby, time for an initial synchronization can be reduced without decreasing the accuracy of the spreading code estimation.
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