Patent ID: 6529829
Filing Date: 2003-03-04
Classification: G01S,H04B

Abstract:
A dead reckoning system, comprising:a Global Positioning System (GPS) receiver, comprising: a first data path for correlating an incoming GPS signal, located within a scanned signal window, with a locally generated signal; and a second data path for verifying the incoming GPS signal, located within the scanned signal window, against a lock signal, the second data path determining whether the incoming GPS signal has at least one characteristic which differentiates the incoming GPS signal from an auto-correlated signal; wherein the GPS receiver can change the locally generated signal to continue to search the scanned signal window for a second incoming GPS signal if the incoming GPS signal lacks the at least one characteristic; and at least one sensor, coupled to the GPS receiver, for selectively providing a dead reckoning input to the GPS receiver in the dead reckoning system for use in computing a position of the GPS receiver.