Radiation-hardened fast acquisition/weak signal tracking system and method
First Claim
1. A global positioning system (GPS) receiver comprising:
- a GPS signal acquisition component comprising a frequency domain correlation module,wherein said GPS signal acquisition component is adapted to acquire a GPS signal by receiving data from said GPS signal and processing said data to detect said GPS signal within one second for GPS signals with an EIRP of at least −
160 dBW, andwherein said GPS receiver is adapted to operate in a space environment.
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Abstract
A global positioning system (GPS) receiver and method of acquiring and tracking GPS signals comprises an antenna adapted to receive GPS signals; an analog radio frequency device operatively connected to the antenna and adapted to convert the GPS signals from an analog format to a digital format; a plurality of GPS signal tracking correlators operatively connected to the analog RF device; a GPS signal acquisition component operatively connected to the analog RF device and the plurality of GPS signal tracking correlators, wherein the GPS signal acquisition component is adapted to calculate a maximum vector on a databit correlation grid; and a microprocessor operatively connected to the plurality of GPS signal tracking correlators and the GPS signal acquisition component, wherein the microprocessor is adapted to compare the maximum vector with a predetermined correlation threshold to allow the GPS signal to be fully acquired and tracked.
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Citations
26 Claims
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1. A global positioning system (GPS) receiver comprising:
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a GPS signal acquisition component comprising a frequency domain correlation module, wherein said GPS signal acquisition component is adapted to acquire a GPS signal by receiving data from said GPS signal and processing said data to detect said GPS signal within one second for GPS signals with an EIRP of at least −
160 dBW, andwherein said GPS receiver is adapted to operate in a space environment. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A global positioning system (GPS) receiver comprising:
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a GPS signal acquisition component comprising a frequency domain correlation module, wherein said GPS signal acquisition component is adapted to acquire said GPS signals with an EIRP of at or below −
180 dBW without a priori data, andwherein the acquired GPS signal is acquired by receiving data from said GPS signal and processing said data to detect said GPS signal substantially in real time. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A global positioning system (GPS) receiver comprising:
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a GPS signal acquisition component comprising a frequency domain correlation module, wherein said GPS signal acquisition component is adapted to acquire said GPS signals with an EIRP of at or below −
160 dBW without a priori data, andwherein the acquired GPS signal is acquired by receiving data from said GPS signal and processing said data to detect said GPS signal substantially in real time. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method of acquiring global positioning system (GPS) signals, said method comprising the steps:
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receiving GPS signals; performing a frequency domain correlation process on said GPS signals; comparing the correlated GPS signals with a predetermined threshold and acquiring a GPS signal if a correlated GPS signal exceeds the predetermined threshold; wherein said steps of acquiring said GPS signals are performed within one minute for GPS signals as low as −
180 dBW. - View Dependent Claims (25, 26)
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Specification