Satellite-based integer cycle ambiguity resolution of local medium wave radio signals

摘要

A system and methods for resolving integer cycle ambiguity in medium wave carrier radio signals are presented. A satellite signal is received at a receiving location and a measured code phase of the satellite signal is measured. A satellite location estimate of the receiving location is computed based on the measured code phase. Medium wave radio carrier signals from medium wave radio transmitters are received at the receiving location. A number of wavelengths of the medium wave radio carrier signals from the satellite location estimate to each of the medium wave radio transmitters is determined respectively. A carrier phase of each of the medium wave radio carrier signals is measured. An improved position estimate of the receiving location is computed based on the number of wavelengths and the carrier phase of each of the medium wave radio carrier signals, and a location of each of the medium wave radio transmitters.

主权项

1. A system for resolving integer cycle ambiguity in medium wave radio signals comprising:
a satellite receiver operable to:
receive at least one satellite signal at a receiving location; andmeasure a measured code phase of the at least one satellite signal; at least one medium wave radio receiver operable to:
receive a plurality of medium wave radio carrier signals from a plurality of medium wave radio transmitters at the receiving location, wherein each of the medium wave radio carrier signals is an amplitude modulated radio carrier signal; andmeasure a plurality of carrier phases of the plurality of the medium wave radio carrier signals; and a processor module operable to:
compute a satellite location estimate of the receiving location based on the measured code phase;determine one or more potential navigation solutions based on the plurality of carrier phases;determine a particular navigation solution of the one or more potential navigation solutions based on the satellite location of the receiving location;determine a number of wavelengths of the medium wave radio carrier signals from the particular navigation solution to each of the medium wave radio transmitters respectively; andcompute a position estimate of the receiving location based on the number of wavelengths and the plurality of carrier phases.