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公开(公告)号：PT1112510E
公开(公告)日：2005-01-31
申请号：PT99945487
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： SIH GILBERT C , INYUP KANG , QIUZHEN ZOU
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment of the invention comprises a method for performing position location comprising the steps of receiving signal samples, generating a coarse acquisition sequence, rotating the coarse acquisition sequence yielding a rotated coarse acquisition sequence, and applying the rotated coarse acquisition sequence to the signal samples at a set of time offsets yielding correlated output data.
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公开(公告)号：DK1112510T3
公开(公告)日：2004-12-06
申请号：DK99945487
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： KANG INYUP , SIH GILBERT C , ZOU QIUZHEN
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment of the invention comprises a method for performing position location comprising the steps of receiving signal samples, generating a coarse acquisition sequence, rotating the coarse acquisition sequence yielding a rotated coarse acquisition sequence, and applying the rotated coarse acquisition sequence to the signal samples at a set of time offsets yielding correlated output data.
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公开(公告)号：BR0107463A
公开(公告)日：2004-11-03
申请号：BR0107463
申请日：2001-01-08
Applicant: QUALCOMM INC
Inventor： JOHN JOHNNY K , SIH GILBERT C , LEUNG NIKOLAI K N
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公开(公告)号：HK1052595A1
公开(公告)日：2003-09-19
申请号：HK03104854
申请日：2003-07-08
Applicant: QUALCOMM INC
Inventor： SIH GILBERT C , FEVRIER IAN , KANG INYUP , PATRICK CHRISTOPHER
IPC: G06F17/15 , H04B1/7093 , H04B7/26 , H04B
Abstract: A novel and improved method and apparatus for searching is described. This searcher combines the ability to search multiple offsets of single pilots, such as those found in the IS-95 system, with the ability to search multiple pilots, such as those found in a GPS location determination system. Both types of searching can be done in a single architecture combining the parallel computation features of a matched filter with the flexibility of allowing a variable number of coherent accumulations and a variable number of non-coherent accumulations to be performed at high speed for a wide range of search hypotheses in a resource efficient manner. This invention allows for parallel use of the matched filter structure in a time-sliced manner to search multiple windows. In addition, the searcher allows for optional independent Walsh decovering for each search window. The time-sharing approach allows for optional frequency searching of any offset.
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公开(公告)号：AU763169B2
公开(公告)日：2003-07-17
申请号：AU6027699
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： SIH GILBERT C , ZOU QUIZHEN
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment of the invention comprises a method of performing position location in a wireless subscriber unit having a local oscillator, including the steps of receiving a position location request, acquiring a timing signal when a sufficient period of time has elapsed since the local oscillator has been corrected and correcting said local oscillator using a correction signal based on said timing signal, substantially freezing the correction signal, performing a position location procedure using the local oscillator with the correction signal applied, and ending said position location procedure.
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Patent Agency Ranking
公开(公告)号：ES2189809T3
公开(公告)日：2003-07-16
申请号：ES94932117
申请日：1994-10-27
Applicant: QUALCOMM INC
Inventor： SIH GILBERT C , ANTONIO FRANKLIN P
Abstract: An apparatus that automatically adjusts the adaptation block size for a least-mean square (LMS) adaptive filter depending on the input signal-to-noise ratio (SNR) is disclosed. The apparatus monitors the instantaneous SNR and continually adjusts the block size to provide high noise immunity, thereby increasing the convergence speed of the filter and decreasing the asymptotic mean-square error. An exemplary embodiment of the present invention is presented in the context of acoustic echo cancellation, though it is noted that the adaptive filter of the present invention is useful in any environment in which the noise characteristics are subject to change.
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公开(公告)号：AU759886B2
公开(公告)日：2003-05-01
申请号：AU5807899
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： KANG INYUP , SIH GILBERT C , ZOU QIUZHEN
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment of the invention comprises a method for performing position location comprising the steps of receiving signal samples, generating a coarse acquisition sequence, rotating the coarse acquisition sequence yielding a rotated coarse acquisition sequence, and applying the rotated coarse acquisition sequence to the signal samples at a set of time offsets yielding correlated output data.
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公开(公告)号：AU755996B2
公开(公告)日：2003-01-02
申请号：AU5908299
申请日：1999-09-03
Applicant: QUALCOMM INC
Inventor： SIH GILBERT C , ZOU QIUZHEN , KANG INYUP , FEVRIER IAN J
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment comprises a method for performing position location using a set of signals transmitted from a set of satellites including the steps of storing coarse search data, performing a coarse search on said coarse search data for each satellite from said set of satellites, receiving fine search data, performing a set of fine searches on said fine search data, each fine search being performed on a different time segment of said fine search data, and reporting results.
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公开(公告)号：CA2723058A1
公开(公告)日：2002-08-29
申请号：CA2723058
申请日：2002-02-15
Applicant: QUALCOMM INC
Inventor： LI TAO , HOLENSTEIN CHRISTIAN , KANG INYUP , WALKER BRETT C , PETERZELL PAUL E , CHALLA RAGHU , SEVERSON MATTHEW L , RAGHUPATHY ARUN , SIH GILBERT C
Abstract: A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.
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公开(公告)号：BR9913551A
公开(公告)日：2002-04-23
申请号：BR9913551
申请日：1999-09-02
Applicant: QUALCOMM INC
Inventor： ZOU QUIZHEN , SIH GILBERT C , EDMONSTON BRIAN S
IPC: G01S1/00 , G01S5/00 , G01S19/09 , G01S19/23 , G01S19/24 , G01S19/25 , G01S19/29 , G01S19/30 , G01S19/46 , H04Q7/34 , H04Q7/38 , G01S5/14
Abstract: The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. In one embodiment the invention comprises a method in a subscriber unit (10) for performing position location in a CDMA wireless communications system having a base station (12), the method comprising: receiving a position location request containing aiding information from the base station (12) over a first receive frequency; in response to the position location request, tuning a receiver (52, 54, 102, 104) of the subscriber unit (10) away from the first receive frequency to a position location frequency in order to receive position location information; and receiving information over the position location frequency and using the received information to perform a position location procedure, the method being characterized by: including data transition boundary information in the aiding information.
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