System and method for detecting interference in global positioning satellite signals
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Accused Products
Abstract
A system and method are provided for detecting local interference in GPS signals. A GPS receiver is capable of determining its GPS coordinates. A memory is capable of storing an initial location of the GPS receiver and a user-defined range of error. A processor is programmed to determine whether GPS coordinates from the GPS receiver differ from the initial location by more than a range of error, and for issuing a warning in response thereto.
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Citations
23 Claims
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1-8. -8. (canceled)
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9. A system for monitoring GPS accuracy, comprising:
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a GPS receiver capable of determining its GPS coordinates;
a memory capable of storing an initial location of said GPS receiver and a user-defined range of error;
a processor being programmed to determine whether GPS coordinates from said GPS receiver differ from said initial location by more than a range of error, and for issuing a warning in response thereto;
a remote unit including said GPS receiver, said memory, said processor, and a transmitter capable of sending said warning; and
a monitoring unit including a receiver capable of receiving said warning and a display capable of displaying information relating to said warning.
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10-11. -11. (canceled)
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12. A method for detecting errors in GPS accuracy, comprising:
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determining an initial GPS position of a marker;
receiving GPS signals at the marker;
calculating, from the GPS signals, a GPS coordinate position of the marker;
comparing the GPS coordinate position and the initial GPS position; and
issuing a warning if the GPS coordinate position differs from the initial GPS position by more than a predetermined amount;
wherein the marker is in the same location for said determining and said calculating.
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13. A system for monitoring GPS accuracy, comprising:
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a stationary GPS receiver capable of determining its GPS coordinates;
a memory capable of storing an initial location of said GPS receiver and a user-defined range of error; and
a processor being programmed to determine whether GPS coordinates from said GPS receiver differ from said initial location by more than a range of error, and for issuing a warning in response thereto. - View Dependent Claims (14, 15)
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16. A method for detecting errors in detected position, comprising:
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determining an initial position of a marker;
receiving signals at the marker;
calculating, from the signals, a detected position of the marker;
comparing the detected position and the initial position;
issuing a warning if the detected position differs from the initial position by more than a predetermined amount;
identifying, in response to said issuing, a source of local interference; and
neutralizing the source of local interference. - View Dependent Claims (17, 18)
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19. A method for detecting errors in detect position, comprising:
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determining an initial position of a marker;
receiving signals at the marker;
calculating, from the signals, a detected position of the marker;
comparing the detected position and the initial position; and
issuing a warning if the detected position differs from the initial GPS position by more than a predetermined amount;
said determining further comprising;
calculating a plurality of positions for the marker over a period of time;
statistically analyzing the plurality of positions; and
setting said initial position based on a result of said analyzing. - View Dependent Claims (20, 21, 22)
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23. A system for detecting local interference in GPS signals, comprising:
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a plurality of remote units, each including;
a circuit capable of determining its location;
a memory capable of storing an initial location of said marker and a range of error;
a processor being programmed to determine whether a detected location of said marker differs from said initial location by more than a range of error, and for issuing a warning in response thereto;
a transmitter capable of transmitting said warning;
a monitoring unit including a receiver capable of receiving said warning from each of said plurality of remote units, and a display capable of displaying information relating to said warning;
wherein said plurality of remote units collectively provide local interference detection over an area.
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Specification