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US 2002/0118133 A1Published application
System and method for computing navigation information in the presence of interference
AssigneeLockheed Martin Corporation
InventorGerard A. Desjardins
Life of this patent
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Abstract
Navigation information for a first navigation system is computed based on interference signals and satellite signals. The first navigation system comprises means for receiving N satellite signals capable of being processed and at least M interference signals, where M=K−N and K equals the minimum number of satellites required to be tracked for unambiguously determining navigation information for the first navigation system. Based on the at least M interference signals and the N satellite signals received and capable of being processed, the navigation system computes navigation information for the first navigation system.
Claims14
A method for computing navigation information for a first navigation system, the method comprising:
- receiving N satellite signals capable of being processed;
- receiving at least M interference signals, where M=K−N and K equals the minimum number of satellites required to be tracked for unambiguously determining navigation information for the first navigation system;
- and
- computing navigation information for the first navigation system based on the at least M interference signals and the N satellite signals received and capable of being processed.
1 more element
A first navigation system for computing navigation information comprising:
- means for receiving N satellite signals capable of being processed and at least M interference signals, where M=K−N and K equals the minimum number of satellites required to be tracked for unambiguously determining navigation information for the first navigation system;
- means for computing, for each of the at least M interference signals, measurements between the first navigation system and a corresponding source of the interference signal;
- means for computing, for each of the N satellite signals received and capable of being processed, measurements between the first navigation system and a corresponding satellite;
- and
- means for computing navigation information for the first navigation system based on the measurements computed for the at least M interference signals and the N satellite signals received and capable of being processed.
2 more elements
A method for computing navigation information for a first navigation system, the method comprising:
- providing a first navigation system a first distance from at least one interference signal source wherein the first navigation system is incapable of receiving and processing satellite signals from a minimum number of satellites required for unambiguously determining navigation information for the first navigation system and wherein the first navigation system receives at least one interference signal from the at least one interference signal source;
- providing at least one second navigation system a second distance from the at least one interference signal source wherein the at least one second navigation system is capable of receiving the at least one interference signal and capable of receiving and processing satellite signals from a minimum number of satellites required for unambiguously determining navigation information for the at least one second navigation system;
- receiving from the at least one second navigation system information relating to the at least one interference signal received by the at least one second navigation system;
- receiving navigation information for the at least one second navigation system;
- receiving a location of the at least one interference signal source;
- and
- computing navigation information for the first navigation system based on the at least one interference signal received by the first navigation system, the information relating to the at least one interference signal received from the at least one second navigation system, the navigation information for the at least one second navigation system, the location of the at least one interference signal source, and any satellite information based on any satellite signals received by the first navigation system capable of being processed.
4 more elements
A system for computing navigation information for a first navigation system, the system comprising:
- a first navigation system a first distance from at least one interference signal source wherein the first navigation system is incapable of receiving and processing satellite signals from a minimum number of satellites required for unambiguously determining navigation information for the first navigation system and wherein the first navigation system is capable of receiving at least one interference signal from the at least one interference signal source;
- and
- at least one second navigation system a second distance from the at least one interference signal source wherein the at least one second navigation system is capable of receiving the at least one interference signal and capable of receiving and processing satellite signals from a minimum number of satellites required for unambiguously determining navigation information for the at one second navigation system, wherein:
- the at least one second navigation system comprises:
- means for transmitting information relating to the at least one interference signal received by the at least one second navigation system;
- and
- means for transmitting navigation information for the at least one second navigation system;
- and
- the first navigation system comprises:
- means for receiving the at least one interference signal from the at least one interference signal source;
- means for receiving navigation information for the at least one second navigation system;
- means for receiving the information relating to the at least one interference signal transmitted by the at least one second navigation system;
- means for receiving a location of the at least one interference signal source;
- and
- means for computing navigation information for the first navigation system based on the at least one interference signal received by the first navigation system, the information relating to the at least one interference signal transmitted by the at least one second navigation system, the navigation information for the at least one second navigation system, the location of the at least one interference signal source, and any satellite information based on any satellite signals received by the first navigation system capable of being processed.
12 more elements
A system for computing navigation information for a first navigation system, the system comprising:
- a first navigation system a first distance from at least one interference signal source wherein the first navigation system is incapable of receiving and processing satellite signals from a minimum number of satellites required for unambiguously determining navigation information for the first navigation system and wherein the first navigation system is capable of receiving at least one interference signal from the at least one interference signal source;
- at least one second navigation system a second distance from the at least one interference signal source wherein the at least one second navigation system is capable of receiving the at least one interference signal and capable of receiving and processing satellite signals from a minimum number of satellites required for unambiguously determining navigation information for the at least one second navigation system and wherein the at least one second navigation system comprises means for transmitting information relating to the at least one interference signal received by the at least one second navigation system and means for transmitting navigation information for the at least one second navigation system;
- means for receiving navigation information for the at least one second navigation system;
- means for receiving the information relating to the at least one interference signal transmitted by the at least one second navigation system;
- means for receiving a location of the at least one interference signal source;
- and
- means for computing navigation information for the first navigation system based on the at least one interference signal received by the first navigation system, the information relating to the at least one interference signal transmitted by the at least one second navigation system, the navigation information for the at least one second navigation system, the location of the at least one interference signal source, and any satellite information based on any satellite signals received by the first navigation system capable of being processed.
4 more elements
Dependencies are inferred from the claim text.