US6369751B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal receiving apparatus of global positioning system and mobile wireless terminal apparatus
Assignee: Sony Corp
•
Filing: 2000-10-19
•
Granted: 2002-04-09
•
Expires: 2020-10-19
Abstract
Abstract A signal receiving apparatus of the global positioning system and a mobile wireless terminal apparatus execute the synchronization acquisition to the satellite signal at high speed and reduce the consumption of electric power. According to the present invention, since the spread spectrum signal from the base station of the cellular system, that is synchronized with the satellite signal to be transmitted from the GPS satellite, is received and based on the spread spectrum signal the system time signal as a reference signal used to synchronize with the satellite signal is generated, and receiving the satellite signal, the synchronization acquisition with the PN code in the satellite signal can be executed in a short period of time in synchronism with the system time signal. And thereby the consumption of electric power can be further reduced.
Inventors
- 👤 Tetsuya Naruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:33
CPC Classifications
G; G01; G01S; G01S19/00; G01S19/01; G01S19/03; G01S19/05; H; H04; H04W; H04W56/00; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/212; H04B7/2125; H04B7/216; H04W52/00; H04W52/02; H04W84/00; H04W84/02; H04W84/04; H04W84/06; H04B7/185; H04B7/1853; H04B7/18545; H04B7/18547; H04B7/18554; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
107 words
A signal receiving apparatus of a global positioning system comprising: communication system receiving means for receiving a transmission signal synchronized with a satellite signal to be transmitted from a satellite of the global positioning system, from a base station of the communication system; timing signal generating means for generating the timing signal as a reference signal used to synchronize with said satellite signal based on the transmission signal of said communication system; and satellite signal receiving means for receiving said satellite signal and securing synchronization with pseudo noise code in said satellite signal based on said timing signal to be supplied from the timing signal generating means.
Claim 2
Dependent Claim
107 words
A signal receiving apparatus of a global positioning system comprising: communication system receiving means for receiving a transmission signal synchronized with a satellite signal to be transmitted from a satellite of the global positioning system, from a base station of the communication system; timing signal generating means for generating the timing signal as a reference signal used to synchronize with said satellite signal based on the transmission signal of said communication system; and satellite signal receiving means for receiving said satellite signal and securing synchronization with pseudo noise code in said satellite signal based on said timing signal to be supplied from the timing signal generating means.
Claim 3
Dependent Claim
48 words
The signal receiving apparatus of the global positioning system according to claim 1 , wherein said timing signal generating means generates timing information required for demodulating said satellite signal by securing synchronization with the pseudo noise code of transmission signal from the base station of said communication system.
Claim 4
Dependent Claim
98 words
The signal receiving apparatus of the global positioning system according to claim 2 , wherein said signal receiving means recognizes the location of said base station based on data to be obtained by demodulating the transmission signal from the base station of said communication system; and said satellite signal receiving means assumes communicable satellite from among multiple satellites existing based on said timing information obtained by said timing signal generating means and said location recognized by said signal receiving means, and predicts the type of code series of PN code corresponding to said satellite assumed to be communicable.
Claim 5
Dependent Claim
56 words
The signal receiving apparatus of the global positioning system according to claim 1 , wherein said timing signal generating means recognizes the phase of pseudo noise code in said satellite signal synchronized with the transmission signal by obtaining synchronism with the pseudo noise code in the transmission signal from the base station of said communication system.
Claim 6
Dependent Claim
36 words
The signal receiving apparatus of the global positioning system according to claim 1 , wherein said satellite signal receiving means demodulates said satellite signal intermittently only at the timing when said timing signal is supplied thereto.
Claim 7
Dependent Claim
72 words
The signal receiving apparatus of the global positioning system according to claim 1 , wherein said satellite signal receiving means corrects the time difference between the timing of said received satellite signal and the timing signal by adding the propagation path delay of the transmission signal from the base station of said communication system and the internal processing delay to said timing signal, generated due to the formation of the timing signal.
Claim 8
Dependent Claim
67 words
The signal receiving apparatus of the global positioning system according to claim 1 , wherein said timing signal generating means generates said timing signal with a common multiple of the cycle of the least unit time with which breakpoints of the pseudo noise code in said satellite signal and the pseudo noise code of the transmission signal from the base station of said communication system are coincided.
Claim 9
Dependent Claim
34 words
The signal receiving apparatus of the global positioning system according to claim 7 , wherein said timing signal generating means generates said timing signal with a common multiple of the cycle of 5 msec.
Claim 10
Dependent Claim
35 words
The signal receiving apparatus of the global positioning system as defined in claim 7 , wherein said timing signal generating means generates said timing signal with a common multiple of the cycle of 1.25 msec.
Claim 11
Dependent Claim
28 words
The signal receiving apparatus of the global positioning system according to claim 1 , wherein said communication system is a CDMA cellular system using the direct diffusion system.
Claim 12
Dependent Claim
121 words
A mobile wireless terminal apparatus comprising: communication system receiving means for receiving a transmission signal synchronized with a satellite signal to be transmitted from a satellite of the global positioning system from a base station of the communication system; communication system transmitting means for transmitting signal to the base station of said communication system; timing signal generating means for generating the timing signal as a reference signal used to synchronize with said satellite signal based on the transmission signal of said communication system; and satellite signal receiving means for receiving the satellite signal and for securing the synchronism with the pseudo noise code in said satellite signal based on said timing signal to be supplied from said timing signal generating means.
Claim 13
Dependent Claim
121 words
A mobile wireless terminal apparatus comprising: communication system receiving means for receiving a transmission signal synchronized with a satellite signal to be transmitted from a satellite of the global positioning system from a base station of the communication system; communication system transmitting means for transmitting signal to the base station of said communication system; timing signal generating means for generating the timing signal as a reference signal used to synchronize with said satellite signal based on the transmission signal of said communication system; and satellite signal receiving means for receiving the satellite signal and for securing the synchronism with the pseudo noise code in said satellite signal based on said timing signal to be supplied from said timing signal generating means.
Claim 14
Dependent Claim
48 words
The mobile wireless terminal apparatus according to claim 11 , wherein said timing signal generating means generates a time information required for demodulation of said satellite signal by securing the synchronization with the pseudo noise code in the transmission signal from the base station of said communication system.
Claim 15
Dependent Claim
96 words
The mobile wireless terminal apparatus according to claim 12 , wherein said signal receiving means recognizes the position of said base station based on the data to be obtained by demodulating the transmission signal from the base station of said communication system; and said satellite signal receiving means assumes the communicable satellite from among multiple satellites existing based on the time information obtained by said timing signal generating means and the position recognized by said signal receiving means, and predicts the type of code series of PN code corresponding to said satellite assumed to be communicable.
Claim 16
Dependent Claim
53 words
The mobile wireless terminal apparatus according to claim 11 , wherein said timing signal generating means recognizes the phase of the pseudo noise code in said satellite signal synchronized with said transmission signal by securing synchronism with the pseudo noise code in the transmission signal from the base station of said communication system.
Claim 17
Dependent Claim
32 words
The mobile wireless terminal apparatus according to claim 11 , wherein said satellite signal receiving means demodulates said satellite signal intermittently only at the timing when said timing signal is supplied thereto.
Claim 18
Dependent Claim
68 words
The mobile wireless terminal apparatus according to claim 11 , wherein said satellite signal receiving means corrects the time difference between the timing when said satellite signal is received and said timing signal by adding the propagation path delay of the transmission signal from the base station of said communication system and the internal processing delay related to the formation of said timing signal to said timing signal.
Claim 19
Dependent Claim
65 words
The mobile wireless terminal apparatus according to claim 11 , wherein said timing signal generating means generates said timing signal with the common multiple of the cycle of the least unit time with which the breakpoints of the pseudo noise code of the transmission signal from the base station of said communication system and the pseudo noise code in said satellite signal are in agreement.
Claim 20
Dependent Claim
30 words
The mobile wireless terminal apparatus according to claim 17 , wherein said timing signal generating means generates said timing signal with the common multiple of the cycle of 5 msec.
Claim 21
Dependent Claim
30 words
The mobile wireless terminal apparatus according to claim 17 , wherein said timing signal generating means generates said timing signal with the common multiple of the cycle of 1.25 msec.
Claim 22
Dependent Claim
24 words
The mobile wireless terminal apparatus according to claim 11 , wherein said communication system is a CDMA cellular system using the direct diffusion system.
References Cited (Backward Citations)
US5781541A
Cited
US6307840B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-04-08 | 2005-10-08 | 2006-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-08 | 2009-10-08 | 2010-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-08 | 2013-10-08 | 2014-04-09 | $7700.00 | Window Closed / Lapsed |