公开(公告)号：EP1597843A1

公开(公告)日：2005-11-23

申请号：EP04714124.7

申请日：2004-02-24

Applicant: Qualcomm, Incorporated

Inventor： SIMIC, Emilija, M. ,  PATRICK, Christopher ,  ROWITCH, Douglas ,  BLESSENT, Luca ,  RICK, Roland

IPC: H04B7/26 ,  H04Q7/38 ,  G01S5/14

CPC classification number: H04W64/00 ,  G01S5/0226 ,  G01S5/0273 ,  G01S5/10 ,  G01S19/09 ,  G01S19/11 ,  G01S19/46 ,  H04B7/155 ,  H04B7/2606

Abstract: A forward link repeater delay watermarking (FLRFWM) system and method that enable accurate position location of mobile stations in areas where repeaters are present by watermarking repeated signals with repeater information. A repeater watermarks a forward link signal with a (unique or non-unique) time delay modulation waveform watermark every time a signal passes through the repeater. A mobile station detects and/or identifies the time delay watermark on the forward link signal to determine repeater information that aids the network position determination entity or mobile station position location system in determining position location using AFLT and/or A-GPS systems. A forward link time delay watermarking system can be implemented to achieve low impact on FL and AFLT performance, favorable detection and identification probabilities, and short time-to-detect/identify.

公开(公告)号：EP1552322A2

公开(公告)日：2005-07-13

申请号：EP03809162.5

申请日：2003-10-17

Applicant: QUALCOMM Incorporated

Inventor： PATRICK, Christopher ,  ROWITCH, Douglas, N.

IPC: G01S5/14 ,  G01S1/04 ,  H04B1/707

CPC classification number: G01S19/29 ,  G01S19/30 ,  H04B1/70757 ,  H04B2201/70715

Abstract: A method of and system for estimating a parameter of a local maxima or minima of a correlation function derived from a received signal . An interpolated local maxima or minima is determined. An interpolation offset is then derived, comprising a deviation between locations of the interpolated and sampled local maxima or minima of the function. An estimate of the parameter is derived from the interpolation offset.

公开(公告)号：EP1290463A2

公开(公告)日：2003-03-12

申请号：EP01933237.8

申请日：2001-05-08

Applicant: QUALCOMM INCORPORATED

Inventor： PATRICK, Christopher ,  YOUNIS, Saed, G.

IPC: G01S1/02 ,  H04B1/707 ,  H03J7/04

CPC classification number: G01S19/235 ,  H03J7/04 ,  H03L1/00 ,  H03L1/026 ,  H03L7/18 ,  H04B1/707 ,  H04L2027/0016

Abstract: The frequency error of an oscillator is minimized by characterizing the oscillator. A reference signal from an external source containing a minimal frequency error is provided to an electronic device. The external signal is used as a reference frequency to estimate the frequency error of an internal frequency source. The electronic device monitors parameters that are determined to have an effect on the frequency accuracy of the internal frequency source. Temperature is one parameter known to have an effect on the frequency of the internal frequency source. The electronic device collects and stores the values of the parameters as well as the corresponding output frequency or frequency error of the internal frequency source. The resultant characterization of the internal frequency source is used to compensate the internal frequency source when the internal frequency source is not provided the external reference signal.

公开(公告)号：EP1825289B1

公开(公告)日：2010-12-22

申请号：EP05851884.6

申请日：2005-11-17

Applicant: QUALCOMM INCORPORATED

Inventor： GAAL, Peter ,  PATRICK, Christopher

IPC: G01S1/00

CPC classification number: G01S19/09 ,  G01S19/23 ,  G01S19/235 ,  G01S19/29

公开(公告)号：EP1668382B1

公开(公告)日：2010-05-19

申请号：EP04809776.0

申请日：2004-09-17

Applicant: QUALCOMM INCORPORATED

Inventor： GUM, Arnold J. ,  PATRICK, Christopher

IPC: G01S5/14 ,  G01S5/02

CPC classification number: G01S19/48 ,  G01S5/0252 ,  G01S5/0263 ,  G01S5/14 ,  G01S19/09 ,  G01S19/25 ,  H04W64/00

Abstract: A wireless communication device, known as a mobile station (MS), contains a conventional wireless communication system and further comprises a wireless computer network communication subsystem and may also include GPS capability. The operator of the MS may utilize any or all of these subsystems to determine the current position of the MS. Based on the current position of the MS, location-based services are provided to the MS as sales information, schedules, prices, maps, and the like. In a typical implementation a plurality of computer network access points, or beacons, are distributed throughout a geographic region and used to determine the position of the MS with a reasonably high degree of accuracy. Based on the current position of the MS, the beacons can provide location-based services.

公开(公告)号：EP1749215B1

公开(公告)日：2009-08-12

申请号：EP05755075.8

申请日：2005-05-26

Applicant: Qualcomm, Incorporated

Inventor： ROWITCH, Douglas N. ,  PATRICK, Christopher

IPC: G01S1/00 ,  G01S5/14 ,  H04W4/02

CPC classification number: H04W64/00 ,  G01S19/05 ,  G01S19/25

Abstract: An assisted wireless position determination system includes a plurality of base stations and a plurality of wireless devices, such as mobile telephones and personal digital assistants, adapted to communicate with the base stations. The wireless position determination system also includes a position determination system for determining the geographic position of the wireless devices. The position determination system includes a position determination entity (PDE) that is connected to the base stations and serves as a processing server for computing the position of the wireless devices. The system and method reduces or eliminates redundant and superfluous data. In addition, the system and method ensure that the wireless device is not loaded with additional capacity, and that the wireless device is provided with precise location information. The embodiments of the system and method of the invention are compliant with the TIA/EIA IS-801 standard or other standards.

公开(公告)号：EP1880234A2

公开(公告)日：2008-01-23

申请号：EP06770254.8

申请日：2006-05-10

Applicant: QUALCOMM INCORPORATED

Inventor： SIMIC, Emilija, M. ,  PATRICK, Christopher ,  CHALLA, Raghu ,  ROWITCH, Douglas, N.

IPC: G01S13/74

CPC classification number: G01S19/235 ,  H04B1/26

Abstract: A receiver according to one embodiment includes a frequency control unit configured to receive a stream of samples including a plurality of received instances of a transmitted signal. The frequency control unit is configured to output a first correction signal (e.g. indicating a rotation) that is based on more than one of the received instances and a second correction signal (e.g. to control an oscillator) that is also based on more than one of the received instances. In some embodiments, a controlled oscillator is used to receive and/or transmit another signal, such as a signal received from a GPS space vehicle. In other embodiments, the received instances are from a GPS signal. In further embodiments, a fixed-frequency oscillator is used, and the second correction signal is used to receive and/or transmit another signal, such as a GPS signal.

公开(公告)号：EP1825289A2

公开(公告)日：2007-08-29

申请号：EP05851884.6

申请日：2005-11-17

Applicant: QUALCOMM INCORPORATED

Inventor： GAAL, Peter ,  PATRICK, Christopher

IPC: G01S1/00

CPC classification number: G01S19/09 ,  G01S19/23 ,  G01S19/235 ,  G01S19/29

Abstract: A receiving method and apparatus for increasing coherent integration length while receiving a positioning signal from transmitters such as GPS satellites. In order to compensate for frequency drifts that may occur in the positioning signal, a hypothesis is made as to the frequency drift, which is inserted into the receiving algorithm. Advantageously, the length of coherent integration can be increased at the expense of reducing the length of incoherent integration while keeping the total integration length the same, the net effect of which is an increase in signal detection sensitivity. The frequency drift hypothesis has any appropriate waveform; for example, approximately linear or exponential. The hypothesized frequency drift can be inserted into the receiver algorithm in any suitable place; for example, the data block may be adjusted for the hypothesized frequency drift, alternatively the reference signal may be adjusted, or the frequency samples of either the data block or the reference signal may be adjusted.

公开(公告)号：EP1817605A2

公开(公告)日：2007-08-15

申请号：EP05852691.4

申请日：2005-12-01

Applicant: QUALCOMM INCORPORATED

Inventor： SIMIC, Emilija M. ,  PATRICK, Christopher ,  ROWITCH, Douglas N.

IPC: G01S1/00 ,  H04B1/707

CPC classification number: G01S19/34 ,  G01S19/03 ,  G01S19/21 ,  G01S19/22 ,  G01S19/29 ,  H04B1/7077 ,  H04K3/228

Abstract: A method according to an embodiment obtains a list of peaks for each of a number of frequency hypotheses. Each peak has an energy result and corresponds to a code phase hypothesis. Embodiments include methods and apparatus that may be used in identifying a location of a signal (such as a GPS signal) in a two-dimensional search space. Location information may be further applied to operations such as signal acquisition, signal tracking, position location of a receiver, and timing operations such as the synchronization of one or more other processes.

公开(公告)号：EP1618406A2

公开(公告)日：2006-01-25

申请号：EP04760228.9

申请日：2004-04-02

Applicant: QUALCOMM INCORPORATED

Inventor： GAAL, Peter ,  SHEYNBLAT, Leonid ,  PATRICK, Christopher ,  RILEY, Wyatt, Thomas

IPC: G01S5/14

CPC classification number: G01S19/25 ,  G01S19/254 ,  G01S19/258 ,  G01S19/27

Abstract: Signal acquisition assistance data is obtained for receiving devices such as wireless position assisted location devices (208, 210) seeking signals from any source (B1-B10), such as satellite vehicles and base stations. The data may be obtained from previously acquired data, based upon evaluation of changes in parameters such as time and location that may jeopardize validity. In some cases the data may be adjusted for the changes in parameters. Refined data may be calculated by a receiver using partial measurements of signal sets, particularly if the acquisition assistance data provided by a remote entity includes more distinct parameters than have typically been provided. New data need not be obtained until the validity of previous data expires due to limitations upon temporal extrapolation using Doppler coefficients, unless mobile station movement that cannot be compensated is detected, and jeopardizes validity of the previous data.