公开(公告)号：ES2572376T3

公开(公告)日：2016-05-31

申请号：ES10730908

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

IPC: G01S19/46 ,  G01S19/48

Abstract: Un procedimiento para hacer funcionar una estación móvil (210), que comprende: obtener (110) información de determinación de posición a partir de una señal de un sistema de posicionamiento por satélite SPS (225); caracterizado por determinar (130) una incertidumbre de dicha información de determinación de posición usando una métrica de señal obtenida del entorno de RF, en el que la estación móvil (210) funciona asociada a una o más fuentes no-SPS (250, 260); comparar (140) dicha incertidumbre determinada con un valor de tolerancia a la incertidumbre; y obtener (150) una determinación de posición subsiguiente a partir de una señal SPS (225), si la incertidumbre determinada aumenta por encima de un nivel de umbral tolerable; si no, actualizar (120) la información de determinación de posición usando fuentes no-SPS (250, 260).

公开(公告)号：ES2558319T3

公开(公告)日：2016-02-03

申请号：ES11725292

申请日：2011-06-02

Applicant: QUALCOMM INC

Inventor： RILEY WYATT THOMAS ,  ROWITCH DOUGLAS NEAL ,  FARMER DOMINIC GERARD

IPC: G01S5/02 ,  G01S19/42 ,  G01S19/49

Abstract: Un procedimiento (400) que comprende: almacenar (420) una primera parte de información adquirida desde uno o más orígenes en una primera época, en el que dicha primera parte de información almacenada incluye mediciones de seudoextensiones y mediciones no de seudo-extensiones, para al menos uno de dichos orígenes, y no es suficiente para calcular una solución de navegación; obtener (440), en respuesta a un entorno cambiado de señales y / o una vista cambiada para dichos uno o más orígenes, una segunda parte de información posterior a dicha primera época, que permite el uso de dicha primera parte de información almacenada en el cálculo de dicha solución de navegación; estando el procedimiento (400) caracterizado porque comprende además la inhabilitación del procesamiento de seudo-extensiones para al menos uno de dichos uno o más orígenes durante dicha primera época; habilitar dicho procesamiento de seudo-extensiones para dicho al menos un origen de dichos uno o más orígenes posteriormente a dicha primera época, en respuesta a una reducción de una situación de multitrayecto.

公开(公告)号：BRPI0914632A2

公开(公告)日：2015-10-20

申请号：BRPI0914632

申请日：2009-06-26

Applicant: QUALCOMM INC

Inventor： FARMER DOMINIC GERARD ,  ROWITCH DOUGLAS NEAL ,  WU JIE ,  DAITA LALITAPRASADA V ,  RILEY WYATT THOMAS

IPC: G01S1/00

公开(公告)号：BR0309752A

公开(公告)日：2005-05-10

申请号：BR0309752

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 ,  G01S1/02

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.

公开(公告)号：CA2499419A1

公开(公告)日：2004-05-06

申请号：CA2499419

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 ,  G01S1/04 ,  H04B1/707

Abstract: A method of and system for searching for position determination signals usin g 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. I f the measurements do not satisfy the selected measurement sufficiency criteri a, a higher level, more sensitive search is performed.

公开(公告)号：CA2361075A1

公开(公告)日：2000-08-03

申请号：CA2361075

申请日：2000-01-28

Applicant: QUALCOMM INC

Inventor： ROWITCH DOUGLAS NEAL

IPC: H04L1/16 ,  H04L1/18 ,  H04L29/08

Abstract: The present invention is a novel and improved method and apparatus for performing frame identification. In accordance with one embodiment of the invention, a received frame of data is processed by generating estimates of the received frame, measuring a correlation between said estimates and store d estimates of a previously improperly received frame, processing the received frame as a retransmitted frame when said correlation is greater than a first threshold, processing the received frame as a new frame when said correlatio n is less than a second threshold, wherein said second threshold is less than or equal to said first threshold.

公开(公告)号：CA2726482C

公开(公告)日：2014-05-06

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-switch-ing test that takes into consideration one or more non-timed test conditions to determine if mode-switching may be enabled.

公开(公告)号：CA2720018A1

公开(公告)日：2009-11-05

申请号：CA2720018

申请日：2009-04-29

Applicant: QUALCOMM INC

Inventor： BHATIA ASHOK ,  FARMER DOMINIC GERARD ,  ROWITCH DOUGLAS NEAL ,  GROVER DOUGLAS ,  RAHMAT ARIE ,  ROW CHANG SHIK

IPC: H04B1/40 ,  H04B1/38

Abstract: In a radio frequency (RF) receiver, a receiver RF chain is tuned to a first (e.g., global positioning system (GPS)) channel to permit receipt of a first (e.g., GPS) signal over the first (e.g., GPS) channel on the receiver RF chain during a first time duration. The receiver RF chain is tuned to a second (e.g., cellular page) channel to permit receipt of a second (e.g., cellular page) signal over the second (e.g., cellular page) channel on the receiver RF chain during a second time duration, following the first time duration. The first (e.g., GPS) signal is processed during the first time duration and the second time duration, without any apparent interruption of the first (e.g., GPS) signal during the second time duration. The processing, for example, treats the actual interrup-tion as a temporary, short term fade of the first (e.g., GPS) signal during the second time duration, or provides a bridge signal (e.g., an estimated GPS signal on the receiver RF chain or an actual GPS signal received on another receiver RF chain) during the second time duration.

公开(公告)号：CA2709600A1

公开(公告)日：2009-06-25

申请号：CA2709600

申请日：2008-12-17

Applicant: QUALCOMM INC

Inventor： ROWITCH DOUGLAS NEAL

IPC: H04W48/16

Abstract: Methods and apparatuses are provided for use by a portable wireless device that allow establishing a wireless network signal acquisition rate based, at least in part, on movement data associated with the portable wireless device. The wireless network signal acquisition rate specifies when or how often the portable wireless device should attempt to acquire the wireless network signal.

公开(公告)号：BRPI0411910A

公开(公告)日：2007-04-10

申请号：BRPI0411910

申请日：2004-06-28

Applicant: QUALCOMM INC

Inventor： ROWITCH DOUGLAS NEAL

IPC: H04B7/04 ,  G01S13/74 ,  H04B7/15 ,  H04Q7/20

Abstract: A communication repeater for use in conjunction with a base transceiver subsystem (BTS) of a wireless communication system. The repeater expands the coverage area of the BTS and allows receivers to identify whether the source of a communication signal was directly from a BTS or was broadcast by a repeater. Identification of the signal source facilitates position determination, particularly in hybrid position determination systems. The repeater implements differential delay modulation of the transmitted signal. The repeater re-transmits the original BTS signal as well as a time delayed version of the signal. Additionally, the repeater introduces synthetic path diversity in the form of spatial diversity or polarity diversity to de-correlate the re-transmitted original signal from the time delayed signal. The repeater can broadcast the delayed signal with the same power as the re-transmitted original signal or can attenuate the delayed signal relative to the re-transmitted original signal.