-
公开(公告)号：EP1512985A2
公开(公告)日：2005-03-09
申请号：EP04020084.2
申请日：2004-08-24
CPC分类号： G01S19/34 , G01S19/235 , G01S19/256 , G01S19/35
摘要： A combination of a navigation satellite receiver and a communication device exchanges precise synthesized frequencies and clocks between the navigation satellite receiver and the communication device. In one embodiment, a TCXO crystal serves as a reference for the navigation satellite receiver and locking onto the satellite transmissions allows highly accurate frequency synthesis and clock generation by it for the communication device. In another embodiment, a VCO primarily affiliated with the communication device serves as a basic reference for the navigation satellite receiver, and subsequent locking onto the satellite transmissions again allows highly accurate frequency synthesis and clock generation for the communication device. In a further embodiment, a VCO primarily affiliated with the communication device serves as a basic reference for the navigation satellite receiver after it locks onto the communications systems standards. The navigation satellite receiver therefore has reduced clock uncertainty and can initialize and track satellites much faster than otherwise.
-
32.发明公开Estimating GPS reference frequency drift from PDC-handset VCO-bursts 有权einem系统GPS中的Bestimm des des der derferenzfrequenz，Bursts中的手套电话von einem PDC-Handset ausgesandten VCO-Signals
公开(公告)号：EP1510830A1
公开(公告)日：2005-03-02
申请号：EP04019596.8
申请日：2004-08-18
发明人： McBurney, Paul W.
IPC分类号： G01S1/00
CPC分类号： G01S19/235
摘要： A combination mobile phone and navigation satellite receiver comprises a circuit for correcting GPS receiver reference frequency drift by using VCO burst information periodically received by a PDC handset. A corrected GPS receiver reference frequency drift then enables faster initialization and stable operation of the position solutions made available to users. A GPS numeric controlled oscillator (NCO) receives a PDC handset VCO sample.
摘要翻译： 组合式移动电话和导航卫星接收机包括通过使用由PDC手机定期接收的VCO突发信息来校正GPS接收机参考频率漂移的电路。 校正的GPS接收机参考频率漂移使得能够更快地初始化并且使得可用于用户的位置解决方案的稳定操作。 GPS数控振荡器（NCO）接收一个PDC手机VCO样本。
-
公开(公告)号：EP1336864A3
公开(公告)日：2004-01-14
申请号：EP02028095.4
申请日：2002-12-17
IPC分类号： G01S5/14
CPC分类号： G01S19/42
摘要： A navigation-satellite receiver comprises means for initialization that gets a head start by knowing time to within a few seconds and position to within 150 kilometers. A two-dimensional grid of points is setup with constant altitude that represents solution starting points within the 150 kilometer area. Fractional pseudoranges from each satellite in a constellation are inspected for a best initial fit with the points in the grid. A variety of time bias adjustments within the time bounds are also tried against the points to find a best fitting point. That point then is used in a drive to find the final solution and to produce the first fix from cold start.
-
公开(公告)号：EP1336866A3
公开(公告)日：2004-01-07
申请号：EP02028098.8
申请日：2002-12-17
CPC分类号： G01S19/258 , G01S19/05
摘要： A navigation-satellite receiver network comprises a server connected to the Internet to provide real-time correction information to clients. The server includes a GPS receiver that provides for tracking of a constellation of navigation satellites. When a client is online, it can receive satellite position and velocity information in the form of a polynomial and coefficients. Clock, ionosphere, troposphere, and other corrections are all bundled into one polynomial. The client therefore never computes or uses almanac or ephemeris.
-
35.发明公开High-sensitivity GPS receiver with infrequent use of GPS reference stations 有权GPS接收器与下罕见使用GPS参考站的高灵敏度
公开(公告)号：EP1336865A3
公开(公告)日：2004-01-02
申请号：EP02028097.0
申请日：2002-12-17
IPC分类号： G01S5/14
CPC分类号： G01S19/258 , G01S19/235
摘要： A navigation-satellite receiver depends on a network server to occasionally provide key pieces of information needed during its initialization. The navigation-satellite receiver critically maintains its position uncertainty, sigmaPos, to under 150-km. Therefore, at least every five minutes, the navigation-satellite receiver uses a network connection to download all the ephemeris information for all the operational SV's. The power-off time uncertainty, sigmaTime, is kept under one millisecond by running a real-time clock with a software-compensated crystal oscillator reference. Such information is instantly available at power-up to reduce the time necessary to produce a first fix when receiver signal levels are under -150dbm even for the strongest SV.
-
公开(公告)号：EP1336859A3
公开(公告)日：2004-01-02
申请号：EP02028091.3
申请日：2002-12-17
摘要： A navigation-satellite receiver comprises a crystal oscillator that is affected by local ambient temperature in a repeatable way. After locking onto a GPS satellite, the receiver is used to calculate the true frequency bias of the local crystal oscillator. GPS-system lock provides an atomic-clock basis for such measurements of true frequency. The current temperature of the crystal is measured and recorded in association with the true frequency bias measurement. The data is then used to generate a ninth-order polynomial that describes the frequency drift of the crystal over temperature. Then during receiver initialization when the local reference oscillator is not in lock, the ambient temperature is measured and used to index the ninth-order polynomial to estimate the actual crystal frequency. Such frequency estimate is then used as a basis to find signal from visible SV's in an overhead constellation.
-
37.发明授权
公开(公告)号：EP1340996B1
公开(公告)日：2016-04-20
申请号：EP02028100.2
申请日：2002-12-17
发明人： Kimura, Akira , McBurney, Paul W.
CPC分类号： G01S19/24 , G01S19/05 , G01S19/09 , G01S19/256 , G01S19/258
-
38.发明授权Road map feedback corrections in tightly coupled gps and dead reckoning vehicle navigation 有权紧耦合的GPS和航位推算机动车道地图更正
公开(公告)号：EP2541198B1
公开(公告)日：2015-02-25
申请号：EP11250627.4
申请日：2011-06-30
发明人： McBurney, Paul W , Hirsch, Eric
CPC分类号： G01C21/30 , G01C21/165 , G01S19/26 , G01S19/49
-
公开(公告)号：EP1600787B1
公开(公告)日：2012-08-22
申请号：EP05010141.9
申请日：2005-05-10
IPC分类号： G01S19/25
CPC分类号： G01S19/258
-
-
-
-
-
-
-
-
搜索结果
62 条记录 (耗时 0.013 秒)
