EP0902554A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An auxiliary system for assisting a wireless terminal in determining its position from signals transmitted from a navigation satellite
Assignee: Nokia of America Corp
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Filing: 1998-09-01
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Granted: —
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Expires: 2018-09-01
Abstract
Abstract A wireless terminal (501) and auxiliary system (505) are disclosed that enable the wireless terminal to determine its location based on signals transmitted from navigation satellites (503). 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 (501) and the auxiliary system (505) 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 (via 504) 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. <IMAGE>
Inventors
- 👤 Robert Ellis Richton
- 👤 Giovanni Vannucci
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 05:16
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18545; H04B7/18547; H04B7/1855; H04B7/18552; G; G01; G01S; G01S19/00; G01S19/01; G01S19/03; G01S19/07; G01S19/13; G01S19/23; G01S19/235; G01S19/24; G01S19/25; G01S19/254; G01S19/256; G01S19/258; G01S5/00; G01S5/0009; G01S5/0045; G01S5/0063; H04B7/155; G01S2205/00; G01S2205/001; G01S2205/008; G01S5/0018; G01S5/0027; G01S5/0036
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
50 words
An auxiliary system comprising: a satellite positioning system receiver for receiving a signal from a navigation satellite; a PRN synchronization estimator for generating a PRN synchronization estimate based
on said signal; and a telecommunications transmitter for transmitting said PRN synchronization estimate to
a wireless terminal over a wireless telecommunications link.
Claim 2
Dependent Claim
50 words
An auxiliary system comprising: a satellite positioning system receiver for receiving a signal from a navigation satellite; a PRN synchronization estimator for generating a PRN synchronization estimate based
on said signal; and a telecommunications transmitter for transmitting said PRN synchronization estimate to
a wireless terminal over a wireless telecommunications link.
Claim 3
Dependent Claim
38 words
The auxiliary system of claim 1 further comprising a coarse location estimator for
generating a coarse location estimate of said wireless terminal and wherein said PRN
synchronization estimate is based on said signal and said coarse location estimate.
Claim 4
Dependent Claim
41 words
The auxiliary system of claim 1 further comprising a Doppler shift estimator for
generating a Doppler shift estimate based on said signal and wherein said telecommunications
transmitter transmits said PRN sychronization estimate to said wireless terminal over said
wireless telecommunications link.
Claim 5
Dependent Claim
39 words
The auxiliary system of claim 1 further comprising a demodulator for generating a
modulation bit sequence based on said signal and wherein said telecommunications transmitter
transmits said modulation bit sequence to said wireless terminal over said wireless
telecommunications link.
Claim 6
Dependent Claim
22 words
The auxiliary system of claim 1 further comprising a timing source transmitter for
transmitting to said wireless terminal a system timing signal.
Claim 7
Dependent Claim
42 words
The auxiliary system of claim 1 further comprising: means for receiving a partially processed ranging signal from said wireless terminal
over said wireless telecommunications link: and means for determining a location of said wireless terminal based on said partially
processed ranging signal.
Claim 8
Dependent Claim
25 words
The auxiliary system of claim 5 wherein said telecommunications transmitter
transmits said location of said wireless terminal to said wireless terminal over said
telecommunications link.
Claim 9
Dependent Claim
21 words
The auxiliary system of claim 5 further comprising means for using said location of
said wireless terminal in a location-based service.
Claim 10
Independent Claim
44 words
A method of operating an auxiliary system comprising: receiving a signal from a navigation satellite with a satellite positioning system; generating a PRN synchronization estimate based on said signal; and transmitting said PRN synchronization estimate to a wireless terminal over a wireless
telecommunications link.
Claim 11
Independent Claim
44 words
A method of operating an auxiliary system comprising: receiving a signal from a navigation satellite with a satellite positioning system; generating a PRN synchronization estimate based on said signal; and transmitting said PRN synchronization estimate to a wireless terminal over a wireless
telecommunications link.
Claim 12
Dependent Claim
34 words
The method of claim 8 further comprising the steps of: generating a coarse location estimate of said wireless terminal; and generating said PRN synchronization estimate based on said coarse location estimate
and said signal.
Claim 13
Dependent Claim
34 words
The method of claim 8 further comprising the steps of: generating a Doppler shift estimate based on said signal; and transmitting said Doppler shift estimate to said wireless terminal over said wireless
telecommunications link.
Claim 14
Dependent Claim
34 words
The method of claim 8 further comprising the steps of: generating a modulation bit sequence based on said signal; and transmitting said modulation bit sequence to said wireless terminal over said wireless
telecommunications link.
Claim 15
Dependent Claim
24 words
The method of claim 8 further comprising the step of transmitting a timing signal
to said wireless terminal over a said wireless telecommunications link.
Claim 16
Dependent Claim
40 words
The method of claim 8 further comprising the steps of: receiving a partially processed ranging signal from said wireless terminal over said
wireless telecommunications link; and determining a location of said wireless terminal based on said partially processed
ranging signal.
Claim 17
Dependent Claim
26 words
The method of claim 13 further comprising the step of transmitting said location of
said wireless terminal to said wireless terminal over said wireless telecommunications link.
Claim 18
Dependent Claim
21 words
The method of claim 13 further comprising the step of using said location of said
wireless terminal in a location-based service.
References Cited (Backward Citations)
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