INTELLIGENT PASSIVE NAVIGATION SYSTEM FOR BACK-UP

专利名称：INTELLIGENT PASSIVE NAVIGATION SYSTEM

FOR BACK-UP AND VERIFICATION OF GPS

发明人：Jameson Bergin,J. Doss Halsey,John Don

Carlos

申请号：US10615526申请日：20030708

公开号：US20050096845A1公开日：20050505

专利附图：

摘要：A passive navigation system for an airborne platform includes an onboardcomputer having a database that contains preprogrammed information regarding pre-

existing ground-based signal emitters (e.g. cell-phone, television and radio broadcasttransmitters). For each emitter, the database includes the geolocation of the emitter andidentifying signal characteristic(s) of each emitter's signal such as frequency, bandwidthand strength. An antenna array and digital receiver cooperate with the computer on theplatform to passively receive signals from the emitters and determine a direction ofarrival (DOA) for selected signals. The computer also extracts identifying signal

characteristic(s) from selected received signals and matches them against the databaseinformation to ascertain the geolocation of the emitter that corresponds to the receivedsignal. The platform location is then calculated from the DOA(s) and emitter

geolocations using a triangulation-type algorithm. Also, preprogrammed site-specificterrain scattering information can be compared to observed scattered signals to enhancesystem accuracy.

申请人：Jameson Bergin,J. Doss Halsey,John Don Carlos

地址：Nashua NH US,Falls Church VA US,San Diego CA US

国籍：US,US,US

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