Network-assisted global positioning systems, methods and terminals including doppler shift and code phase estimates
First Claim
1. A wireless communications system comprising:
- a terrestrial wireless network that is configured to transmit wireless communications including Global Positioning System (GPS) data over a satellite frequency band; and
a mobile terminal that is configured to receive the wireless communications including the GPS data from the terrestrial wireless network over the satellite frequency band and to perform pseudo-range measurements using the GPS data that is received over the satellite frequency band.
17 Assignments
0 Petitions
Accused Products
Abstract
A mobile terminal is configured to receive wireless communications including GPS data from a terrestrial and/or satellite wireless network, and to perform pseudo-range measurements using the GPS data that is received. The mobile terminal may be configured to perform pseudo-range measurements by receiving GPS coarse/acquisition (C/A) signals from GPS satellites, estimating Doppler shifts in the received GPS C/A signals, and estimating received code phases of the GPS C/A signals using the Doppler shifts that are estimated. The estimated code phases and/or the estimated Doppler shifts of the GPS C/A signals can provide the pseudo-range measurements. By removing the Doppler shift from the received signal samples prior to performing the code phase measurement, reduced computational complexity and/or processing time may be obtained.
-
Citations
69 Claims
-
1. A wireless communications system comprising:
-
a terrestrial wireless network that is configured to transmit wireless communications including Global Positioning System (GPS) data over a satellite frequency band; and
a mobile terminal that is configured to receive the wireless communications including the GPS data from the terrestrial wireless network over the satellite frequency band and to perform pseudo-range measurements using the GPS data that is received over the satellite frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A terrestrial wireless network for a cellular wireless communications system comprising:
a plurality of terrestrial base stations that are configured to transmit wireless communications including global Positioning System (GPS) data to mobile terminals over a satellite frequency band. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
17. A mobile terminal comprising:
-
a receiver that is configured to receive wireless communications including Global Positioning System (GPS) data over a satellite frequency band that is outside a GPS frequency band; and
a processor that is configured to perform pseudo-range measurements using the GPS data that is received over the satellite frequency band that is outside the GPS frequency band. - View Dependent Claims (18, 19, 20)
-
-
21. A mobile terminal comprising:
-
a receiver that is configured to receive Global Positioning System (GPS) C/A signals from a plurality of GPS satellites; and
a processor that is configured to estimate Doppler shifts in the GPS C/A signals and to estimate received code phases of the GPS C/A signals using the Doppler shifts that are estimated. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
-
36. A wireless communications method comprising:
-
transmitting wireless communications including Global Positioning System (GPS) data over a terrestrial wireless network using a satellite frequency band;
receiving the wireless communications including the GPS data from the terrestrial wireless network at a mobile terminal over the satellite frequency band; and
performing pseudo-range measurements at the mobile terminal using the GPS data that is received over the satellite frequency band. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
-
-
45. A terrestrial wireless communications method comprising:
terrestrially transmitting wireless communications including Global Positioning System (GPS) data to mobile terminals over a satellite frequency band. - View Dependent Claims (46, 48, 49, 50)
-
47. A terrestrial wireless method according to claim 47 further comprising:
terrestrially transmitting the pseudo-range measurements to a network operations center.
-
51. A mobile terminal operating method comprising:
-
receiving wireless communications including Global Positioning System (GPS) data over a satellite frequency band that is outside a GPS frequency band; and
performing pseudo-range measurements using the GPS data that is received over the satellite frequency band that is outside the GPS frequency band. - View Dependent Claims (52, 53, 54)
-
-
55. A mobile terminal operating method comprising:
-
receiving Global Positioning System (GPS) C/A signals from a plurality of GPS satellites;
estimating Doppler shifts in the GPS C/A signals; and
estimating received code phases of the GPS C/A signals using the Doppler shifts that are estimated. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
-
Specification