Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-07-01
2008-07-01
Ramakrishnaiah, Melur (Department: 2614)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456200, C455S456400
Reexamination Certificate
active
07395073
ABSTRACT:
A method for location estimation employs filtering in both the radio signal domain and the space domain separately. The method filters raw values of the run-time radio signal measurements to reject distorted inputs. A region of confidence (RoC) is formed according to certain algorithms. Only location estimates falling within the RoC are considered for further processing. The location estimate candidates filtered by the RoC are put in a number of time-indexed bins. Each of the bins contains location estimate candidates obtained at similar times. A shortest route connecting a candidate from each bin is calculated to further improve the accuracy of the location estimation.
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Gwon Youngjune Lee
Jain Ravi Kumar
Kawahara Toshiro
Kwok Edward C.
MacPherson Kwok & Chen & Heid LLP
NTT DoCoMo Inc.
Ramakrishnaiah Melur
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