Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1997-04-22
2000-03-21
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342457, 342465, G01S 124, G01S 302
Patent
active
060408006
ABSTRACT:
Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide improved techniques for using a system of monitoring or adjunct stations to provide this location information to the emergency service centers. For example, either time of arrival (TOA) or time difference of arrival (TDOA) techniques can be selectively used to process received signals and provide location information. Techniques for improving timing estimates are also disclosed.
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Koilpillai R. David
Koorapaty Havish
Molnar Karl
Raith Alex K.
Ramesh Rajaram
Ericsson Inc.
Issing Gregory C.
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