GROUND MAP MONITOR FOR MAP-BASED, VISION NAVIGATION SYSTEMS

Abstract: a ground map monitor method comprises obtaining positions of communication nodes in a communications network, selecting transmission and reception nodes from the communication nodes, and measuring bistatic signals between the transmission and reception nodes to determine nominal signal performance characteristics for the bistatic signals, including reflected signal time delays, frequency shifts, and power levels. the method further comprises monitoring the bistatic signals for changes to nominal signal performance characteristics. the method uses discriminators between the nominal signal performance characteristics and a current performance level of the bistatic signals, and compares the discriminators against performance thresholds, to determine whether current signal performance characteristics have varied from their nominal levels. an alert signal is broadcast that a section of a navigation map is not useable for navigation of a vehicle if changes in the current performance level of the bistatic signals exceeds the performance thresholds.

Inventor(s): Vibhor L. Bageshwar, Brian Schipper

CPC Classification: G01S13/003 ({Bistatic radar systems; Multistatic radar systems})

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