| Precise real time navigation is required in many industries such as farming, forestry and construction. These systems are in high demand since they improve productivity. Numerous navigation systems are available today. Unfortunately, they do not satisfy many of the requirements of users in these specific applications.;This thesis describes preliminary work toward the development of a low cost, precise, real time navigation system. This system uses AM radio stations as its primary beacons. The phase of AM carrier is used to provide distance ranging. Triangulation is then to be used to determine position of a moving vehicle.;This navigation system is based on a mixed analog and digital process which is called software radio. The full AM radio spectrum is captured through a wideband receiver and digitized directly using a fast A/D converter. Digital signal processing is then be used to process data for phase measurements.;This thesis presents a number of approaches for precision navigation using AM broadcasts and analog phase measurement techniques. (Abstract shortened by UMI.). |
