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21.发明专利
公开(公告)号：CA2317200A1
公开(公告)日：2001-03-07
申请号：CA2317200
申请日：2000-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VANNUCCI GIOVANNI , DA REN
Abstract: Disclosed is a method and apparatus for facilitating detection of satellite signals using a sequential search technique. The sequential search technique is a knowledge based technique that sequentially searches for satellite signals based on search messages and information accumulated during prior searches to effectively reduce the area and code phase search range in which a GPS receiver searches for the satellite signals, thereby enhancing detection of the satellite signals.
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公开(公告)号：DE60144168D1
公开(公告)日：2011-04-21
申请号：DE60144168
申请日：2001-04-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DA REN , VANNUCCI GIOVANNI
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公开(公告)号：AT501447T
公开(公告)日：2011-03-15
申请号：AT01303678
申请日：2001-04-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DA REN , VANNUCCI GIOVANNI
Abstract: An improved code acquisition scheme for faster acquisition of GPS "coarse acquisition" (C/A) codes leads to faster detection of GPS signals, and thereby a wireless terminal may determine its position in a shorter period of time. The scheme is a combination of a frequency-domain and time-domain code acquisition techniques. The scheme utilizes a frequency-domain code acquisition technique to detect one GPS signal and to create a precise timing reference at the wireless terminal; and then utilizes time-domain code acquisition techniques to detect other GPS signals from the same satellite or other satellites faster. The scheme has the advantage of being able to be used for any wireless communications system without the requirement of maintaining a precise timing reference in the wireless terminals, and without the requirement of heavy computational resources that are usually needed in systems that utilize frequency-domain code acquisition techniques.
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Patent Agency Ranking
公开(公告)号：BR0101555A
公开(公告)日：2002-01-02
申请号：BR0101555
申请日：2001-04-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DA REN , VANNUCCI GIOVANNI
Abstract: An improved code acquisition scheme for faster acquisition of GPS "coarse acquisition" (C/A) codes leads to faster detection of GPS signals, and thereby a wireless terminal may determine its position in a shorter period of time. The scheme is a combination of a frequency-domain and time-domain code acquisition techniques. The scheme utilizes a frequency-domain code acquisition technique to detect one GPS signal and to create a precise timing reference at the wireless terminal; and then utilizes time-domain code acquisition techniques to detect other GPS signals from the same satellite or other satellites faster. The scheme has the advantage of being able to be used for any wireless communications system without the requirement of maintaining a precise timing reference in the wireless terminals, and without the requirement of heavy computational resources that are usually needed in systems that utilize frequency-domain code acquisition techniques.
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公开(公告)号：CA2340519A1
公开(公告)日：2001-11-03
申请号：CA2340519
申请日：2001-03-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VANNUCCI GIOVANNI , DA REN
Abstract: An improved code acquisition scheme for faster acquisition of GPS "coarse acquisition" (C/A) codes leads to faster detection of GPS signals, and thereby a wireless terminal ma y determine its position in a shorter period of time. The scheme is a combination of a frequency-domain an d time-domain code acquisition techniques. The scheme utilizes a frequency-domain code acquisition techniqu e to detect one GPS signal and to create a precise timing reference at the wireless terminal, and then utilizes time-domain code acquisition techniques to detect other GPS signals from the same satellite or other satellites faster. The scheme has the advantage of being able to be used for any wireless communications system without the requirement of maintaining a precise timing reference in the wireless terminals, and withou t the requirement of heavy computational resources that are usually needed in systems that utilize frequency-domain code acquisition techniques.
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公开(公告)号：AU1673801A
公开(公告)日：2001-08-09
申请号：AU1673801
申请日：2001-01-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DA REN , VANNUCCI GIOVANNI
Abstract: Estimated Global Position System (GPS) navigation data is used to increase the signal integration interval. In one embodiment, a WAG (wireless assisted GPS) server receives GPS signals and demodulates the navigation data modulated onto the GPS signals. The WAG server utilizes known features of the demodulated navigation data to generate estimated navigation data for the satellite. This estimation can be made several seconds or even minutes ahead of time. The wireless terminal uses this estimated navigation data to perform a data wipe-off operation to enable the integration interval to be increased (e.g., beyond 20 ms), thereby increasing overall signal-detection sensitivity at the wireless terminal. In another embodiment, information from strong GPS signals is used to detect weak GPS signals from other satellites. In this embodiment, strong GPS signals are received directly by the wireless terminal from the satellites. After strong GPS signals have been detected, the strong GPS signals are demodulated to compute satellite ephemerides including navigation data. The demodulated navigation data is then matched with known features of the navigation data to estimate the navigation data for weak GPS signals. The estimated navigation data is then used to increase the integration interval for weak GPS signals so that weak GPS signals can also be detected at the wireless terminal.
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公开(公告)号：CA2330510A1
公开(公告)日：2001-08-04
申请号：CA2330510
申请日：2001-01-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DA REN , VANNUCCI GIOVANNI
Abstract: Estimated Global Position System (GPS) navigation data is used to increase t he signal integration interval. In one embodiment, a WAG (wireless assisted GPS ) server receives GPS signals and demodulates the navigation data modulated onto the GPS signals. The WAG server utilizes known features of the demodulated navigatio n data to generate estimated navigation data for the satellite. This estimation can be made several seconds or even minutes ahead of time. The wireless terminal uses this estimated navigation data to perform a data wipe-off operation to enable the integrati on interval to be increased (e.g., beyond 20 ms), thereby increasing overall signal-detecti on sensitivity at the wireless terminal. In another embodiment, information from strong GPS signals is used to detect weak GPS signals from other satellites. In this embodiment, strong GPS signals are received directly by the wireless terminal from the satellites. After strong GPS signals have been detected, the strong GPS signals are demodulated to compute satellite ephemerides including navigation data. The demodulated navigation data is then matched with known features of the navigation data to estimate the navigatio n data for weak GPS signals. The estimated navigation data is then used to increase the integration interval for weak GPSsignals so that weak GPS signals can also be detected a t the wireless terminal.
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28.发明专利
公开(公告)号：AU5506000A
公开(公告)日：2001-03-08
申请号：AU5506000
申请日：2000-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DA REN , VANNUCCI GIOVANNI
Abstract: Disclosed is a method and apparatus for facilitating detection of satellite signals using a sequential search technique. The sequential search technique is a knowledge based technique that sequentially searches for satellite signals based on search messages and information accumulated during prior searches to effectively reduce the area and code phase search range in which a GPS receiver searches for the satellite signals, thereby enhancing detection of the satellite signals.
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