EP0902300A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Telecommunications-assisted satellite positioning system
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 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 (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.
Inventors
- 👤 Giovanni Vannucci
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
G; G01; G01S; G01S19/00; G01S19/01; G01S19/13; G01S19/24; G01S19/25; G01S19/03; G01S19/05; G01S19/06; G01S5/00; G01S5/0009; G01S5/0045; G01S5/0063; G01S2205/00; G01S2205/001; G01S2205/008; G01S5/0018; G01S5/0027; G01S5/0036
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
48 words
A wireless terminal comprising: a telecommunications receiver for receiving a PRN synchronization estimate from a
auxiliary system over a wireless telecommunications link; a field receiver for receiving a ranging signal from a satellite and for using said PRN
synchronization estimate to assist in despreading of said ranging signal.
Claim 2
Dependent Claim
37 words
The wireless terminal of claim 1 wherein said telecommunications receiver also
receives a Doppler shift estimate for said satellite from said auxiliary system and said field
receiver uses said Doppler shift estimate to modify said ranging signal.
Claim 3
Dependent Claim
27 words
The wireless terminal of claim 1 wherein said field receiver uses said PRN
synchronization estimate and said ranging signal to determine a position of said wireless
terminal.
Claim 4
Dependent Claim
25 words
The wireless terminal of claim 3 further comprising a display for conveying said
position of said wireless terminal to a user of said wireless terminal.
Claim 5
Dependent Claim
23 words
The wireless terminal of claim 3 further comprising a telecommunications
transmitter for transmitting said position of said wireless terminal to said auxiliary system.
Claim 6
Dependent Claim
20 words
The wireless terminal of claim 1 further comprising a telecommunications
transmitter for transmitting said despread signal to said auxiliary system.
Claim 7
Dependent Claim
40 words
A wireless terminal comprising: a telecommunications receiver for receiving a Doppler shift estimate from a auxiliary
system; a field receiver for receiving a ranging signal from a satellite and for using said Doppler
shift estimate to modify said ranging signal.
Claim 8
Dependent Claim
39 words
The wireless terminal of claim 1 or 7 wherein said telecommunications receiver also
receives a modulation bit sequence for said satellite from said auxiliary system and said field
receiver uses said modulation bit sequence to despread said ranging signal.
Claim 9
Dependent Claim
38 words
The wireless terminal of claim 1 or 7 wherein said telecommunications receiver also
receives a system timing signal from said auxiliary system and said field receiver uses said
system timing signal to facilitate despreading of said ranging signal.
Claim 10
Dependent Claim
43 words
A wireless terminal comprising: a telecommunications receiver for receiving a modulation bit sequence for a satellite
from a auxiliary system; a field receiver for receiving a ranging signal from said satellite and for using said
modulation bit sequence to despread said ranging signal.
Claim 11
Independent Claim
49 words
A method of operating a wireless terminal comprising: receiving with a telecommunications receiver a PRN synchronization estimate for a
satellite from a auxiliary system; receiving with a field receiver a ranging signal from said satellite; and using said PRN synchronization estimate to assist in despreading of said ranging signal.
Claim 12
Dependent Claim
37 words
The method of claim 11 further comprising the steps of: receiving with said telecommunications receiver a Doppler shift estimate for said
satellite from said auxiliary system; and modifying said ranging signal based on said Doppler shift estimate.
Claim 13
Dependent Claim
36 words
The method of claim 11 further comprising the steps of: receiving with said telecommunications receiver a modulation bit sequence for said
satellite from said auxiliary system; and despreading said ranging signal with said modulation bit sequence.
Claim 14
Dependent Claim
36 words
The method of claim 11 further comprising the steps of: receiving with said telecommunications receiver a system timing signal from said
auxiliary system; and using said system timing signal to facilitate despreading of said ranging signal.
Claim 15
Dependent Claim
27 words
The method of claim 11 further comprising the step of using said PRN
synchronization estimate and said ranging signal to determine a position of said wireless
terminal.
References Cited (Backward Citations)
No citation records indexed.
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