-
公开(公告)号：AU2003222007A1
公开(公告)日：2003-11-17
申请号：AU2003222007
申请日：2003-03-17
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , KIAEI SAYFE
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：AR028879A1
公开(公告)日：2003-05-28
申请号：ARP000105966
申请日：2000-11-13
Applicant: MOTOROLA INC
Inventor： ZHAO YILIN , KING THOMAS M , GEIER GEORGE J
IPC: G01S19/27 , G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/07 , G01S19/08 , G01S19/20 , H04Q7/34 , H04Q7/38 , H04B7/19
Abstract: Se refiere en general a sistemas de comunicacion por radio. Más en particular, se refiere a un método para mantener la integridad de la determinacion de la ubicacion de un microteléfono en un sistema de comunicacion por radio. Dichos sistemas de comunicacion por radio generalmente suministran comunicacion de voz y datos en dos sentidos entre ubicaciones remotas. La carga computacional que realiza el cálculo tradicional es significativa. El microteléfono debe incluir un procesador de alto nivel capaz de realizar los cálculos necesarios. Para aplicaciones de GPS, los errores de ubicacion reciben contribucion del reloj de satélite, la orbita del satélite, la prediccion de las efemérides, la demora ionosférica; la demora troposférica, y la disponibilidad selectiva (SA). Para reducir estos errores, se pueden aplicar correcciones de intervalos e intervalo-velocidad a las mediciones base del pseudo rango para crear una solucion de posicion que se precisa hasta algunos metros en ambientes abiertos. Una de dichas técnicas de correccion es el GPS diferencial (DGPS).
-
公开(公告)号：BR0204146A
公开(公告)日：2003-02-11
申请号：BR0204146
申请日：2002-02-05
Applicant: MOTOROLA INC
Inventor： ZHAO YILIAN , KING THOMAS M , GRIER GEORGE J
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：AU756506B2
公开(公告)日：2003-01-16
申请号：AU7154900
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：GB2358976B
公开(公告)日：2002-09-18
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: 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.
-
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.
-
19.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。
-
20.发明申请DETECTION AND REDUCTION OF PERIODIC JAMMING SIGNALS IN GPS RECEIVERS AND METHODS THEREFOR 审中-公开GPS接收机周期性信号的检测和减少及其方法
公开(公告)号：WO2004109315A3
公开(公告)日：2005-04-14
申请号：PCT/US2004013892
申请日：2004-05-04
Applicant: MOTOROLA INC , KING THOMAS M , RICKS THOMAS , MURRAY DAVID
Inventor： KING THOMAS M , RICKS THOMAS , MURRAY DAVID
Abstract: A method for eliminating or reducing interference in a receiver, for example, interference in a satellite positioning system receiver caused by a co-located TDMA transmitter, including detecting (210) the presence of a jamming signal, generating a synchronous blanking signal (220), and reducing the jamming signal by blanking (230) the receiver with a blanking signal. In one embodiment, the jamming signal is detected in the receiver, for example, at a correlator output of a satellite positioning system receiver.
Abstract translation: 一种用于消除或减少接收机中的干扰的方法，例如由共同定位的TDMA发射机引起的卫星定位系统接收机中的干扰，包括检测（210）干扰信号的存在，产生同步消隐信号（220） 并且通过用消隐信号消隐（230）接收机来减少干扰信号。 在一个实施例中，在接收机中例如在卫星定位系统接收机的相关器输出处检测到干扰信号。
-
-
-
-
-
-
-
-
-
Search Results
48
records
(took 0.026 seconds)
