Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-12-12
2010-11-30
Afshar, Kamran (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S404200, C455S456500, C455S456600, C455S067110, C455S115100, C370S319000
Reexamination Certificate
active
07844280
ABSTRACT:
One illustrative embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme. The OFDM scheme comprises transmitting signal components over narrowband frequency channels spanning a wideband channel. The system includes a first receiving system configured to receive a fraction of the signal components transmitted by a first wireless transmitter to be located in a fraction of the narrowband frequency channels, and to process the fraction of the signal components to derive location related measurements. The system further includes at least a second receiving system configured to receive the fraction of the signal components transmitted by the first wireless transmitter, and to process this fraction of the signal components to derive location related measurements. The system also includes a processing system configured to use location related measurements from the first and second receiving systems to compute the location of the wireless transmitter.
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Patent Cooperation Treaty, “Notification of transmittal of the international search report and the written opinion of the international searching authority, or the declaration,” International Searching Authority, 2008, 11 pages.
Anderson Robert J.
Mia Rashidus S.
Afshar Kamran
Choo Munsoon
TruePosition, Inc.
Woodcock & Washburn LLP
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