Preamble searching apparatus and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jul 31, 2003
app pub date -
Jan 30, 2003
filing date -
Oct 6, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus and method for searching for preambles in a base station of a mobile telecommunications system employing a CDMA system. The method comprises the steps of inputting oversampled samples of each chip associated with a first antenna from an access slot boundary and storing the inputted samples in a first buffer, inputting oversampled samples of each chip associated with a second antenna after the lapse of a predetermined delay from the access slot boundary and storing the inputted samples in a second buffer, reading samples in a period of a plurality of chips from the first and second buffers and correlating the read samples with scramble codes to generate signatures corresponding respectively to a plurality of hypotheses, calculating an accumulated energy value of each of the signatures, and sorting the signatures by identical ones and selecting one with a maximum accumulated energy value from among the sorted signatures.
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