Portable hybrid location determination system
作者： Peter Van Wyck Loomis , John F. Schipper , James M. Janky
DOI:
关键词:
摘要: Apparatus and method for determining the present location of a mobile user that carries apparatus inside or outside buildings structures within region R. The includes radio determination (LD) signal module receives radiowaves from at least three LD sources, such as FM carrier subcarrier signals, an outdoor signals other satellite-based ground-based GPS, GLONASS Loran-C sources. are used to (1) determine module, (2) (3) indicium representing strength quality signals. compared with threshold values these indicia, most one is selected user. can be combined in hybrid portable system, two modules separated move independently each other.
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