Patent ID: 6408244
Filing Date: 2002-06-18
Classification: G01C,G01S

Abstract:
A navigation system, comprising:a GPS receiver including a GPS measurement system that performs a GPS measurement in a first predetermined cycle to obtain a GPS solution; and a processor that estimates a location of a vehicle, the processor having an interface to said GPS receiver, wherein said GPS receiver further includes: at least one dead-reckoning sensor interface that receives at least on e dead-reckoning sensor signal; a sampling system that in a second predetermined cycle samples said at least one dead-reckoning sensor signal received through said at least one dead-reckoning sensor interface to obtain first data wherein said sampling system samples said at least one dead reckoning sensor signal a plurality of times, the first data including a plurality of second data, said second data representing data sampled at said plurality of times respectively; and an outputting system that outputs the GPS solution and the first data sampled by said sampling system in a third predetermined cycle, and wherein said processor receives the GPS solution and the first data through said interface, said processor performing a dead-reckoning using the first data to obtain a dead-reckoning solution, and wherein said processor estimates the location of the vehicle based on the GPS solution and the dead-reckoning solution.