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21.发明专利
公开(公告)号：AU2003284883A1
公开(公告)日：2004-05-13
申请号：AU2003284883
申请日：2003-10-22
Applicant: QUALCOMM INC
Inventor： SIMIC EMILIJA , PATRICK CHRISTOPHER , ROWITCH DOUGLAS NEAL
Abstract: Position determination accuracy of a wireless communication device may be negatively affected by a large unaccounted GPS doppler bias, which in turn may affect GPS doppler estimations and GPS doppler measurements conducted by the wireless communication device. The quality of GPS doppler measurements is very important for position location, because poor quality GPS doppler measurements may prevent the wireless communication device from acquiring satellites in the most sensitive modes with narrow frequency ranges, which results in reduced GPS pseudorange measurement yield. Large unaccounted GPS doppler bias also adversely affects position accuracy because of the adverse effect on the GPS code phase measurements time propagation to common time prior to their use in position location calculation. The same is true in the case of unaccounted CDMA code doppler, through the adverse effect on the AFLT code phase measurements time propagation to common time prior to their use in a position location engine. This effect is the biggest concern in the case of large search windows. Therefore, the present disclosure provides a method of optimizing GPS based position location in the presence of time-varying frequency error, including the steps of continuously measuring and/or calculating resulting GPS doppler bias and CDMA code doppler bias and then minimizing their adverse effects with regard to position location determination by re-centering GPS doppler search windows based on the GPS doppler bias value, as well as using GPS doppler bias and CDMA code doppler bias value to properly propagate GPS pseudorange and AFLT pilot phase measurements, respectively, to common time prior to their use in a position location engine.
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22.发明专利
公开(公告)号：CA2499415A1
公开(公告)日：2004-05-06
申请号：CA2499415
申请日：2003-10-22
Applicant: QUALCOMM INC
Inventor： SIMIC EMILIJA , PATRICK CHRISTOPHER , ROWITCH DOUGLAS NEAL
Abstract: Position determination accuracy of a wireless communication device may be negatively affected by a large unaccounted GPS doppler bias, which in turn m ay affect GPS doppler estimations and GPS doppler measurements conducted by the wireless communication device. The quality of GPS doppler measurements is ve ry important for position location, because poor quality GPS doppler measuremen ts may prevent the wireless communication device from acquiring satellites in t he most sensitive modes with narrow frequency ranges, which results in reduced GPS pseudorange measurement yield. Large unaccounted GPS doppler bias also adversely affects position accuracy because of the adverse effect on the GPS code phase measurements time propagation to common time prior to their use i n position location calculation. The same is true in the case of unaccounted CDMA code doppler, through the adverse effect on the AFLT code phase measurements time propagation to common time prior to their use in a positio n location engine. This effect is the biggest concern in the case of large search windows. Therefore, the present disclosure provides a method of optimizing GPS based position location in the presence of time-varying frequency error, including the steps of continuously measuring and/or calculating resulting GPS doppler bias and CDMA code doppler bias and then minimizing their adverse effects with regard to position location determination by re-centering GPS doppler search windows based on the GPS doppler bias value, as well as using GPS doppler bias and CDMA code doppler bias value to properly propagate GPS pseudorange and AFLT pilot phase measurements, respectively, to common time prior to their use in a position location engine.
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公开(公告)号：ES2786305T3
公开(公告)日：2020-10-09
申请号：ES15188297
申请日：2011-06-02
Applicant: QUALCOMM INC
Inventor： RILEY WYATT THOMAS , ROWITCH DOUGLAS NEAL , FARMER DOMINIC GERARD
Abstract: Un procedimiento (400) para determinar una solución de navegación que comprende: obtener información del sistema de navegación inercial, INS, a partir de uno o más orígenes en una primera época; almacenar (420) dicha información del INS obtenida en la primera época, en la que la información del INS almacenada no es suficiente para calcular una solución de navegación; y obtener (440) en una segunda época posterior a la primera época una segunda parte de información, que permite determinar una ubicación de inicio donde se tomó la información del INS almacenada, comprendiendo la segunda parte de información información de posición de uno o más orígenes de los sistemas de localización por satélite, SPS, en el que la obtención (440) es en respuesta a un entorno de señal cambiado y/o a una vista cambiada al uno o más orígenes; correlacionar la ubicación de inicio con un tiempo registrado en el cual se tomaron las mediciones del INS; y extrapolar una posición usando el tiempo registrado y dicha ubicación de inicio donde se tomó dicha información del INS, en base, al menos en parte, a la información del INS almacenada.
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24.发明专利
公开(公告)号：HUE048679T2
公开(公告)日：2020-07-28
申请号：HUE15188297
申请日：2011-06-02
Applicant: QUALCOMM INC
Inventor： RILEY WYATT THOMAS , ROWITCH DOUGLAS NEAL , FARMER DOMINIC GERARD
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公开(公告)号：ES2705011T3
公开(公告)日：2019-03-21
申请号：ES10722475
申请日：2010-05-26
Applicant: QUALCOMM INC
Abstract: Un procedimiento (400) para reducir el consumo de energía en un dispositivo móvil (106), que comprende: recibir (406) información de movimiento; establecer (408) datos de movimiento (220) basados en la información de movimiento, en donde la información de movimiento se recibe desde un sensor de movimiento y un receptor del Sistema de Posición de Satélite, SPS; procesar la información de movimiento del sensor de movimiento y el receptor de SPS para refinar los datos de movimiento; determinar la probabilidad de que el dispositivo móvil esté estacionario utilizando los datos de movimiento; determinar (412) que el dispositivo móvil (106) está estacionario cuando la probabilidad determinada es mayor que una probabilidad de umbral; y reducir (414) la frecuencia de búsqueda de un origen de señal cuando el dispositivo móvil (106) está estacionario, en donde el origen de señal comprende una estación base y / o un satélite de SPS.
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Patent Agency Ranking
公开(公告)号：HUE027043T2
公开(公告)日：2016-08-29
申请号：HUE10730908
申请日：2010-06-04
Applicant: QUALCOMM INC
Inventor： ISCHE MARC A , HATAMI AHMAD , HESHMATI ARDALAN , BIACS ZOLTAN F , ROWITCH DOUGLAS NEAL , FARMER DOMINIC GERARD , KAMARSU SRIGOURI , WU JIE
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公开(公告)号：CA2726482A1
公开(公告)日：2009-12-30
申请号：CA2726482
申请日：2009-06-26
Applicant: QUALCOMM INC
Inventor： FARMER DOMINIC GERARD , WU JIE , DAITA LALITAPRASAD V , ROWITCH DOUGLAS NEAL , RILEY WYATT THOMAS
IPC: G01S1/00
Abstract: Methods and apparatuses are provided for use with mode switchable navigation radios and the like. The methods and apparatuses may be implemented to selectively switch between certain operating modes based, at least in part, a mode-switching test that takes into consideration one or more non-timed test conditions to determine if mode-switching may be enabled.
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公开(公告)号：AU2003228836B2
公开(公告)日：2008-07-03
申请号：AU2003228836
申请日：2003-05-02
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL
IPC: G01S19/03 , G01S1/00 , G01S5/14 , G01S19/04 , G01S19/05 , G01S19/07 , G01S19/10 , G01S19/11 , G01S19/25 , G01S19/41 , G01S19/44
Abstract: A method of wireless communications according to one embodiment of the invention includes obtaining a first time base (e.g. obtaining a code phase) from a signal received from a ground transmitter (e.g. a CDMA base station). A predetermined offset based on at least a propagation delay of the received signal is applied to the first time base to obtain a second time base. For example, the second time base may be aligned to a time base of a positioning satellite system (e.g. the NAVSTAR GPS). A timing signal is generated that has a code phase based on the second time base.
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29.发明专利
公开(公告)号：HK1082045A1
公开(公告)日：2006-05-26
申请号：HK06102503
申请日：2006-02-24
Applicant: QUALCOMM INC
Inventor： SIMIC EMILIJA , PATRICK CHRISTOPHER , ROWITCH DOUGLAS NEAL
Abstract: Position determination accuracy of a wireless communication device may be negatively affected by a large unaccounted GPS doppler bias, which in turn may affect GPS doppler estimations and GPS doppler measurements conducted by the wireless communication device. The quality of GPS doppler measurements is very important for position location, because poor quality GPS doppler measurements may prevent the wireless communication device from acquiring satellites in the most sensitive modes with narrow frequency ranges, which results in reduced GPS pseudorange measurement yield. Large unaccounted GPS doppler bias also adversely affects position accuracy because of the adverse effect on the GPS code phase measurements time propagation to common time prior to their use in position location calculation. The same is true in the case of unaccounted CDMA code doppler, through the adverse effect on the AFLT code phase measurements time propagation to common time prior to their use in a position location engine. This effect is the biggest concern in the case of large search windows. Therefore, the present disclosure provides a method of optimizing GPS based position location in the presence of time-varying frequency error, including the steps of continuously measuring and/or calculating resulting GPS doppler bias and CDMA code doppler bias and then minimizing their adverse effects with regard to position location determination by re-centering GPS doppler search windows based on the GPS doppler bias value, as well as using GPS doppler bias and CDMA code doppler bias value to properly propagate GPS pseudorange and AFLT pilot phase measurements, respectively, to common time prior to their use in a position location engine.
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公开(公告)号：BR0315529A
公开(公告)日：2005-08-23
申请号：BR0315529
申请日：2003-10-22
Applicant: QUALCOMM INC
Inventor： ROWITCH DOUGLAS NEAL , PATRICK CHRISTOPHER
IPC: G01S1/00 , G01S19/09 , G01S19/24 , G01S19/25 , G01S19/28 , G01S19/29 , G01S19/45 , G01S19/46 , H04W64/00 , G01S5/14 , H04B1/707 , G01S1/04
Abstract: A method of and system for searching for position determination signals using a plurality of progressively more sensitive search modes comprising a first level mode, a second mode, and at least one higher level mode. If any of the search window parameters exceed prescribed limits, a first level search is performed, and the search window parameters are refined responsive to the ensuing search results so they are within the prescribed limits. Then, the second level search is performed, and measurements derived from the ensuing search results. If the measurements satisfy selected measurement sufficiency criteria, additional searching within the position fix attempt is avoided. If the measurements do not satisfy the selected measurement sufficiency criteria, a higher level, more sensitive search is performed.
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