Method and apparatus for fast pilot channel acquisition using a matched filter in a CDMA radiotelephone
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United States of America Patent
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Sep 7, 1999
Grant Date -
N/A
app pub date -
Oct 29, 1996
filing date -
Oct 29, 1996
priority date (Note) -
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Abstract
Performance of a radiotelephone (104) in a CDMA communication system (100) is enhanced using a receiver searcher (114) that includes a matched filter (128) to capture the pilot energies of all receivable transmissions from a base station (102) and other nearby base stations. A detected PN sequence is compared with a predetermined PN sequence stored at the radiotelephone (104). The predetermined PN sequence includes, for example, the last 512 chips in the short PN sequence used for spreading the in-phase channel and the quadrature-phase channel.
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