Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate
2007-12-10
2010-02-23
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
C342S387000
Reexamination Certificate
active
07667649
ABSTRACT:
In a Wireless Location System (WLS) deployed in connection with a CDMA-based wireless communications system, Location Measurement Units are used to collect multi-path corrupted radio signaling for use in time difference of arrival (TDOA) and hybrid positioning methods. Signal processing techniques are used to enhance the WLS's ability to determine the minimally time-delayed multi-path component and thus increase the accuracy of the TDOA location in CDMA-based wireless communications systems. The signal processing includes a filtering technique for reducing the leading sidelobes of the cross-correlation function as well as a leading edge discovery procedure.
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Anderson Robert J.
LeFever Ronald
Mia Rashidus S.
Mull Fred H
Tarcza Thomas H
TruePosition, Inc.
Woodcock & Washburn LLP
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