Auxiliary system for assisting a wireless terminal in determining its position from signals transmitted from a navigation satellite
First Claim
1. An auxiliary system comprising:
- a satellite positioning system receiver for receiving a signal from a satellite;
a PRN code synchronization estimator for generating a PRN code synchronization estimate based on said signal; and
a telecommunications transmitter for transmitting said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link.
12 Assignments
0 Petitions
Accused Products
Abstract
A wireless terminal and auxiliary system are disclosed that enable the wireless terminal to determine its location based on signals transmitted from navigation satellites. In particular, the tasks of signal acquisition and signal processing required of a wireless terminal in the prior art are divided between the wireless terminal and the auxiliary system in accordance with the illustrative embodiment. The auxiliary system assists the wireless terminal by acquiring information about the satellites'"'"' ephemerides, by partially processing it and by transmitting the partially processed information to the wireless terminal in a form that is useful to the wireless terminal. The wireless terminal then uses the partially processed information from the auxiliary system to assist the wireless terminal in acquiring the ranging signals from the navigation satellites quickly and when they are weak.
31 Citations
60 Claims
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1. An auxiliary system comprising:
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a satellite positioning system receiver for receiving a signal from a satellite; a PRN code synchronization estimator for generating a PRN code synchronization estimate based on said signal; and a telecommunications transmitter for transmitting said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An auxiliary system comprising:
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a satellite positioning system receiver for receiving a signal from a satellite; a demodulator for generating a modulation bit sequence based on said signal; and a telecommunications transmitter for transmitting said modulation bit sequence to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An auxiliary system comprising:
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a timing signal receiver for generating a system timing signal; a satellite positioning system receiver for receiving a signal from a satellite; a demodulator for generating a modulation bit sequence; and a telecommunications transmitter for transmitting said system timing signal and said modulation bit sequence to a wireless terminal over a wireless telecommunications link.
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18. An auxiliary system comprising:
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a timing signal receiver for generating a system timing signal; a satellite positioning system receiver for receiving a signal from a satellite; a PRN code synchronization estimator for generating a PRN code synchronization estimate based on said signal; and a telecommunications transmitter for transmitting said system timing signal and said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (19)
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20. An auxiliary system comprising:
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a satellite positioning system receiver for receiving a signal from a satellite; a Doppler shift estimator for generating a Doppler shift estimate based on said signal; a PRN code synchronization estimator for generating a PRN code synchronization estimate a telecommunications transmitter for transmitting said Doppler shift estimate and said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (22)
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21. An auxiliary system comprising:
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a satellite positioning system receiver for receiving a signal from a satellite; a Doppler shift estimator for generating a Doppler shift estimate based on said signal; a demodulator for generating a modulation bit sequence a telecommunications transmitter for transmitting said Doppler shift estimate and said modulation bit sequence to a wireless terminal over a wireless telecommunications link.
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23. A method comprising:
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receiving a signal from a satellite with a satellite positioning system receiver; generating a PRN code synchronization estimate based on said signal with a PRN code synchronization estimator; and transmitting said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A method comprising:
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receiving a signal from a satellite with a satellite positioning system receiver; generating a modulation bit sequence based on said signal with a demodulator; and transmitting said modulation bit sequence to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A method comprising:
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generating a system timing signal with a timing signal receiver; receiving a signal from a satellite with a satellite positioning system receiver; generating a modulation bit sequence based on said signal with a demodulator; and transmitting said timing signal receiver and said modulation bit sequence to said wireless terminal.
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40. A method comprising:
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generating a system timing signal with a timing signal receive; receiving a signal from a satellite with a satellite positioning system receiver; generating a PRN code synchronization estimate based on said signal with a PRN code synchronization estimator; and transmitting said timing signal receiver and said PRN code synchronization estimate to said wireless terminal. - View Dependent Claims (41)
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42. A method comprising:
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receiving a signal from a satellite with a satellite positioning system receiver; generating a Doppler shift estimate based on said signal with a Doppler shift estimator; generating a PRN code synchronization estimate with a PRN code synchronization estimator; and transmitting said Doppler shift estimate and said PRN code synchronization estimate to said wireless terminal. - View Dependent Claims (44)
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43. A method comprising:
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receiving a signal from a satellite with a satellite positioning system receiver; generating a Doppler shift estimate based on said signal with a Doppler shift estimator; generating a modulation bit sequence with a demodulator; and transmitting said Doppler shift estimate and said modulation bit sequence to said wireless terminal.
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45. An auxiliary system comprising:
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a coarse location estimator for generating a coarse location estimate of a wireless terminal; a PRN code synchronization estimator for generating a PRN code synchronization estimate based on said coarse location estimate; and a telecommunications transmitter for transmitting said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 56)
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53. A method comprising:
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generating a coarse location estimate of said wireless terminal with a coarse location estimator; generating a PRN code synchronization estimate based on said coarse location estimate with a PRN code synchronization estimator; and transmitting said PRN code synchronization estimate to a wireless terminal over a wireless telecommunications link. - View Dependent Claims (54, 55, 57, 58, 59, 60)
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Specification