-
1.发明专利
公开(公告)号：JP2002303533A
公开(公告)日：2002-10-18
申请号：JP2002001838
申请日：2002-01-08
Applicant: MOTOROLA INC
Inventor： GEIER GEORGE J , FIGOR RUSSELL S , STROTHER TROY L
IPC: G01C21/06 , G01C19/00 , G01C21/12 , G01C21/16 , G01C21/28 , G01C25/00 , G01S5/14 , G01S19/48 , G01S19/49
Abstract: PROBLEM TO BE SOLVED: To provide a vehicle navigation system for correcting the drift of temperature-dependent bias by a vehicle heading sensor with a dead-reckoning vehicle positioning system. SOLUTION: Especially, a Kalman filter produces a calibration curve of the bias drift rate of the heading sensor corresponding to the variation of the temperature. The Kalman filter calculates a model coefficient of the bias drift rate to the temperature of the heading sensor by point where a vehicle 4 is rested. Next, using the calibration curve of the bias drift rate, the bias of the heading sensor is periodically estimated while the vehicle is moving. Further, the navigation system converges the error dispersing matrix of the Kalman filter by using the aging time of the bias drift rate of the temperature sensor.
-
公开(公告)号：AU2003222007A8
公开(公告)日：2003-11-17
申请号：AU2003222007
申请日：2003-03-17
Applicant: MOTOROLA INC
Inventor： KIAEI SAYFE , KING THOMAS M , GEIER GEORGE J
Abstract: A method (50) for correcting oscillator frequency error in GPS signal acquisition includes a first step (52) of receiving at least one broadcasted GPS signal. A next step (54) includes estimating a plurality of Doppler offsets. A next step (56) includes correlating the signal to produce a Doppler modulation for each of the plurality of Doppler estimates. A next step (58) includes calculating a magnitude separation of peak and null states of each modulation. A next step (60) includes searching the peak and null separation to finding the Doppler estimate producing the largest magnitude separation in peak and null states. The found Doppler estimate defines a frequency error estimate for the at least one broadcasted GPS signal, which will be common across all satellites.
-
公开(公告)号：GB2358977B
公开(公告)日：2003-07-30
申请号：GB0100619
申请日：2001-01-10
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN
IPC: G01S19/27 , G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/07 , G01S19/08 , G01S19/20 , H04Q7/34 , H04Q7/38 , G01S1/02
Abstract: A cellular network protocol that maintains the reliability of assisted GPS based positioning is taught. An Integrity Monitor (IM) informs mobile stations, their users, or networks of measurement quality and it warns them of failing and failed GPS satellites by isolating them from the effects of these failures. Whenever an unhealthy satellite is detected, its corresponding assistance data will be excluded for delivery or for position determination. In other words, there are two specific aspects to the Integrity Monitor (IM). For DGPS users, it predicts the reliability or quality of the DGPS corrections. For all users, it isolates the mobile position calculation from the effects of GPS satellite failures. The UDRE parameter, nominally output by a reference DGPS receiver, is used to communicate the DGPS quality information, and DGPS corrections are simply excluded for failed satellites. For autonomous GPS users, a special integrity message is required and defined to communicate the satellite failure status information.
-
公开(公告)号：GB2360657A
公开(公告)日：2001-09-26
申请号：GB0027440
申请日：2000-11-09
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN
IPC: G01S19/27 , G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/07 , G01S19/08 , G01S19/20 , H04Q7/34 , H04Q7/38
Abstract: A cellular network protocol which maintains the reliability of assisted GPS based positioning is taught. An Integrity Monitor (IM) informs mobile stations, their users, or networks of measurement quality and it warns them of failing and failed GPS satellites by isolating them from the effects of these failures. Whenever an unhealthy satellite is detected, its corresponding assistance data will be excluded for delivery or for position determination. In other words, there are two specific aspects to the Integrity Monitor (IM). For DGPS users, it predicts the reliability or quality of the DGPS corrections. For all users, it isolats the mobile position calculation from the effects of GPS satellite failures. The UDRE parameter, nominally output by a reference DGPS receiver, is used to communicate the DGPS quality information, and DGPS corrections are simply excluded for failed satellites. For autonomous GPS users, a special integrity message is required and defined to communicate the satellite failure status information.
-
公开(公告)号：GB2358976A
公开(公告)日：2001-08-08
申请号：GB0027434
申请日：2000-11-09
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN , HART ROGER C
Abstract: In a mobile radio communication system, a method for locating handset 104 comprises receiving initial GPS ephemeris data, clock correction data and differential GPS (DGPS) correction data from a reference receiver 118 and base station controller 110, and determining whether the GPS ephemeris data for one or more of the plurality of GPS satellites 120 requires update. If so, a request for updated GPS ephemeris data is made and received from the base station, possibly through a cellular network and transmission 101, and the location of the mobile handset 104 is determined using the initial GPS ephemeris data, the clock correction data, the DGPS correction data, and the updated GPS ephemeris data. The judgement as to whether the ephemeris data requires updating may involve estimating the likely accuracy of the computed location based on the initial ephemeris data, or determining whether the age of the ephemeris data has exceeded a predetermined age limit.
-
Patent Agency Ranking
公开(公告)号：HU0300916A2
公开(公告)日：2003-07-28
申请号：HU0300916
申请日：2002-02-05
Applicant: MOTOROLA INC
Inventor： GEIER GEORGE J , KING THOMAS M , ZHAO YILIN
Abstract: GPS assistance message and data issue identifiers for transmission to GPS enabled mobile stations in cellular communications networks and methods therefore. The GPS data issue identifiers indicate whether GPS data, for example corresponding ephemeris and almanac data, stored at the mobile station requires updating. In the exemplary 3rd generation (W-CDMA/UMTS) architecture, the GPS assistance message is a System Information Block (SIB), and the GPS ephemeris data identifier and corresponding satellite identifier is encoded in a value tag included in a Master Information Block (MIB).
-
公开(公告)号：IT1316006B1
公开(公告)日：2003-03-26
申请号：ITRM20000586
申请日：2000-11-10
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN , HART ROGER C
Abstract: A cellular network protocol which minimizes the required data flow between the cellular infrastructure and each mobile handset supporting a GPS based positioning capability is taught. Four specific innovations are introduced which together minimize the number of bits required to be transferred to each handset: a method for reducing or removing the requirement for GPS ephemeris updates to each mobile; a method for compression of the differential correction broadcast message; a method for controlling the rate at which the network updates each handset's ephemeris based on an ephemeris age limit; and, finally, a method which each mobile can use to determine when an ephemeris update is needed, based on an accuracy prediction and a threshold which is unique to each mobile.
-
公开(公告)号：FR2802037A1
公开(公告)日：2001-06-08
申请号：FR0014378
申请日：2000-11-09
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN
Abstract: An error message, produced by differential correction data to identify off-nominal errors, is transmitted to a mobile handset when differential correction data are determined corresponding to the mobile handset's location. A differential correction message, generated from the differential correction data, is transmitted to the mobile handset. The differential correction data is derived based on a differential global positioning system. Independent claims are also included for the following: (a) an assisted satellite positioning system integrity maintaining method; (b) a mobile radio handset location determining method; (c) and a satellite positioning system enabled mobile radio handset.
-
公开(公告)号：WO2004062240A3
公开(公告)日：2004-10-07
申请号：PCT/US0337960
申请日：2003-11-20
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J
CPC classification number: G01S19/30 , G01S5/0221
Abstract: A method (500) and a mobile station (160) for determining a code phase are described herein. The mobile station (160) may generate a first auto correlation function (ACF) associated with correlation samples over a range of code phases corresponding to a line-of-sight signal. The mobile station (160) may generate a second ACF within the mobile station based on measured correlation samples over a range of code phases. The mobile station (160) may compare the first ACF to the second ACF to generate a code phase offset between the first and second ACFs. The mobile station (160) may adjust the first ACF to match the second ACF.
Abstract translation: 这里描述了用于确定码相位的方法（500）和移动台（160）。 移动台（160）可以产生与对应于视线信号的码相位范围上的相关样本相关联的第一自相关函数（ACF）。 移动台（160）可以基于在一定范围的码相位上测量的相关样本来生成移动台内的第二ACF。 移动台（160）可以将第一ACF与第二ACF进行比较以生成第一ACF和第二ACF之间的码相位偏移。 移动台（160）可以调整第一ACF以匹配第二ACF。
-
10.发明申请
公开(公告)号：WO2007043982A3
公开(公告)日：2008-01-03
申请号：PCT/US2004043050
申请日：2004-12-21
Applicant: MOTOROLA INC , GEIER GEORGE J , HARBOUR ROBERT B , KING THOMAS M
Inventor： GEIER GEORGE J , HARBOUR ROBERT B , KING THOMAS M
CPC classification number: G01S19/235 , H04B7/1853
Abstract: A method (200) and apparatus (900) for correcting frequency errors of received signals in a wireless communication receiver are disclosed. The wireless communication device (900) receives (204) a signal; correlates (206) the received signal with the plurality of offset prestored data sets; generates (208) at a predetermined data rate interval a plurality of signal correlations where each of the plurality of correlations is correlated to each of the plurality of offset prestored data sets; and computes (210) a frequency error estimate based upon the plurality of signal correlations.
Abstract translation: 公开了一种用于校正无线通信接收机中的接收信号的频率误差的方法（200）和装置（900）。 无线通信装置（900）接收（204）信号; 将接收到的信号与多个偏移预先存储的数据集相关（206）; 以预定数据速率间隔产生（208）多个信号相关，其中多个相关中的每一个与多个偏移预存数据集中的每一个相关联; 并且基于所述多个信号相关来计算（210）频率误差估计。
-
-
-
-
-
-
-
-
-
Search Results
31
records
(took 0.025 seconds)
