Patent ID: 6522682
Filing Date: 2003-02-18
Classification: G01C,G01S,H04B

Abstract:
A navigation system comprising:a first processor for tracking GPS signals from a plurality of transmitters and providing data related to the position of an object, the first processor having a spread spectrum receiver for receiving signals modulated by-a spectrum spreading code having a fixed number of bits repeated during a fixed length time period being transmitted from the plurality of transmitters, the receiver comprising: first means for dividing the fixed length time period into a number of time segments evenly divisible into the twice the fixed number of bits; second means for applying each time segment to each of a number of channels, each of the channels being used for tracking one of the plurality of transmitters; third means for applying each of the time segments in each of the channels to a number of code phase delay tests to derive information related to the received signals; and fourth means responsive to the information for deriving the position-related data; a second processor responsive to the position-related data for determining a navigation solution; and a display unit responsive to the navigation solution for providing navigation information related to the object.