Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-12-11
2007-12-11
Wang, Ted (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S142000, C375S148000, C375S152000, C375S285000, C375S343000, C375S346000
Reexamination Certificate
active
10060885
ABSTRACT:
A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) are present, and, if so, distinguishable from the sidelobe(s) of a second peak. If the one or more first peak(s) are present and distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the one or more first peak(s). If the one or more first peak(s) are not present, or, if present, are not distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the second peak. The parameter estimator may be employed in a subscriber station to estimate a parameter such as the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.
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Amerga Messay
Fernandez-Corbaton Ivan
Rick Roland R.
Stein Jeremy M.
Greenhaus Bruce
Mays Andrea
Rouse Thomas
Wang Ted
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