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US 7,605,751 B2Granted
Global navigation satellite system repeater disruption monitoring
AssigneeHoneywell International Inc.
InventorsBrian W. Schipper, Christopher A. Lund, Lawrence C. Vallot
Life of this patent
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Abstract
A method and systems for processing Global Positioning System (GPS) signals is provided. The method includes determining if two signals or more signals with the same pseudorandom number bit sequence (PRN) are detected by a GPS receiver.
Claims12
A method of processing Global Positioning System (GPS) signals, the method comprising:
- determining if two signals or more signals with the same pseudorandom number bit sequence (PRN) are detected by a GPS receiver;
- and
- when two signals or more signals with the same PRN are detected, disregarding the two signals or more signals.
A Global Positioning System (GPS) signal processing system, the system comprising:
- an antenna for receiving GPS signals;
- a processor adapted to converting the antenna signal from the time domain into the frequency domain;
- and
- a correlation module adapted to correlate the incoming signal with the internally generated pseudorandom number (PRN) bit sequence over varying frequency and code offsets;
- a detecting module that detects peak values from the correlation;
- and
- a tracking function configured to indicate when more than one peak value is detected and prompt a GPS receiver to disregard signals when more than one peak correlation value is found.
4 more elements
A computer-readable medium having computer-executable instructions for performing a method comprising:
- converting incoming Global Positioning System (GPS) signals into the frequency domain;
- correlating the frequency domain input signal with the internally generated PRN of the GPS receiver;
- and
- finding at least one peak value of the correlation value over a range of frequency and code offsets;
- determining if more than one peak value is present;
- and
- prompting a GPS receiver to disregard the signals if more than one peak value is found.
4 more elements
Dependencies are inferred from the claim text.