公开(公告)号：AT389977T

公开(公告)日：2008-04-15

申请号：AT98902823

申请日：1998-01-27

Applicant: QUALCOMM INC

Inventor： SIH GILBERT ,  MAURO ANTHONY

IPC: H04B3/23 ,  H04M1/60 ,  H04B3/20 ,  H04M9/08

Abstract: A method and apparatus for controlling various functional elements in a digital telephone system using state determination from an echo canceller. An echo canceller is used to evaluate which one of five talk states two speakers are engaged in during a telephone conversation. This state determination information is used to control a tone detector function, a noise suppressor function, an adaptive equalizer function, a transmission mute function, and a vocoder encoder function within a vocoder. During the talk state where the far-end speaker is active and the near-end speaker is inactive, the echo canceller provides a signal which disables background noise estimates from being performed in the noise suppressor and the vocoder encoder. The same signal is used to disable the tone detector and to enable the transmission mute function during this talk state.

公开(公告)号：AT366001T

公开(公告)日：2007-07-15

申请号：AT00986657

申请日：2000-12-20

Applicant: QUALCOMM INC

Inventor： SIH GILBERT ,  FEVRIER IAN ,  KANG INYUP ,  PATRICK CHRISTOPHER

IPC: G06F17/15 ,  H04B1/7093 ,  H04B7/26

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.

公开(公告)号：HK1053201A1

公开(公告)日：2003-10-10

申请号：HK03105374

申请日：2003-07-25

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SIH GILBERT ,  ROH MARK ,  BUTLER BRIAN ,  CHALLA RAGHU

IPC: H04B1/712 ,  H04B1/7073 ,  H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04L27/00 ,  H04B ,  H04L

Abstract: A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.

公开(公告)号：AT557290T

公开(公告)日：2012-05-15

申请号：AT99946749

申请日：1999-09-02

Applicant: QUALCOMM INC

Inventor： ZOU QIUZHEN ,  SIH GILBERT ,  EDMONSTON BRIAN

IPC: G01S5/00 ,  G01S1/00 ,  G01S19/09 ,  G01S19/23 ,  G01S19/24 ,  G01S19/25 ,  G01S19/29 ,  G01S19/30 ,  G01S19/46 ,  H04Q7/34 ,  H04Q7/38

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.

公开(公告)号：AU774691B2

公开(公告)日：2004-07-01

申请号：AU3655901

申请日：2001-01-26

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SIH GILBERT ,  ROH MARK ,  BUTLER BRIAN ,  CHALLA RAGHU

IPC: H04B1/712 ,  H04B1/7073 ,  H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04L27/00 ,  H04B1/00

Abstract: A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.

公开(公告)号：AU3655901A

公开(公告)日：2001-08-20

申请号：AU3655901

申请日：2001-01-26

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SIH GILBERT ,  ROH MARK ,  BUTLER BRIAN ,  CHALLA RAGHU

IPC: H04B1/712 ,  H04B1/7073 ,  H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04L27/00 ,  H04B1/00

Abstract: A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.

公开(公告)号：AT440295T

公开(公告)日：2009-09-15

申请号：AT99946742

申请日：1999-09-03

Applicant: QUALCOMM INC

Inventor： SIH GILBERT ,  ZOU QIUZHEN ,  KANG INYUP ,  FEVRIER IAN

IPC: G01S1/00 ,  G01S19/23 ,  G01S19/24 ,  G01S19/25 ,  G01S19/29 ,  G01S19/36 ,  G01S19/48

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.

公开(公告)号：AT409870T

公开(公告)日：2008-10-15

申请号：AT99949596

申请日：1999-09-03

Applicant: QUALCOMM INC

Inventor： ZOU QUIZHEN ,  SIH GILBERT ,  KANG INYUP

IPC: G01S1/00 ,  G01S1/04 ,  G01S5/00 ,  G01S19/23 ,  G01S19/25 ,  G01S19/30 ,  G01S19/48 ,  H04M1/725 ,  H04Q7/34

Abstract: A mobile device (10) comprises a receiver and a coherent integrator (104), wherein the receiver is configured to receive a first signal from a satellite, the first signal including a navigation message. The coherent integrator is configured to coherently integrate first signal samples for a particular coherent integration interval. When the coherent integration interval straddles a data boundary of the navigation message, the coherent integration is divided into a section before the data boundary of the navigation message and a section after the data boundary of the navigation message

公开(公告)号：CA2397390A1

公开(公告)日：2001-08-16

申请号：CA2397390

申请日：2001-01-26

Applicant: QUALCOMM INC

Inventor： ROH MARK ,  SIH GILBERT ,  BUTLER BRIAN ,  AGRAWAL AVNEESH ,  CHALLA RAGHU

IPC: H04B1/712 ,  H04B1/7073 ,  H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04L27/00 ,  H04B1/707

Abstract: A novel and improved method and apparatus for frequency tracking is describe d. Two main sources of error that contribute to the frequency difference betwee n locally generated carriers and those used to modulate received signals inclu de frequency offset between the two timing sources and doppler effects due to relative movement between the sources. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger (700a..700n) of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weight ed average of all of these frequency errors is calculated (710) and filtered (720) to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator (706a...706n) for providing frequency adjustment specific to that finger. Th e frequency of each finger is adjusted through feedback of the frequency error finger.

公开(公告)号：WO0159937A2

公开(公告)日：2001-08-16

申请号：PCT/US0102747

申请日：2001-01-26

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  SIH GILBERT ,  ROH MARK ,  BUTLER BRIAN ,  CHALLA RAGHU

IPC: H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04L27/00 ,  H04B1/00

CPC classification number: H04B1/7087 ,  H04B1/7115 ,  H04B1/7117 ,  H04B2201/70701 ,  H04L27/0014 ,  H04L2027/0032 ,  H04L2027/0057 ,  H04L2027/0087

Abstract: A novel and improved method and apparatus for frequency tracking is described. Two main sources of error that contribute to the frequency difference between locally generated carriers and those used to modulate received signals include frequency offset between the two timing sources and doppler effects due to relative movement between the sources. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger (700a..700n) of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated (710) and filtered (720) to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator (706a...706n) for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error finger.

Abstract translation: 描述了用于频率跟踪的新颖和改进的方法和装置。 导致本地产生的载波与用于调制接收信号的载波之间的频率差异的两个主要误差源包括两个定时源之间的频率偏移以及由于源之间的相对运动引起的多普勒效应。 本发明提供了一种用于消除由于频率偏移引起的误差的影响的跟踪机制以及由多个多径信号中的多普勒引起的频率误差的补偿。 利用本发明的RAKE接收机的每个手指（700a ... 700n）将计算该手指的频率误差。 计算所有这些频率误差的加权平均值（710）并进行滤波（720）以提供用于改变IF和RF频率合成器的频率的控制信号，从而考虑每个手指处看到的共同频率偏移。 此外，每个手指配备有用于提供特定于该手指的频率调节的旋转器（706a ... 706n）。 每个手指的频率通过频率误差手指的反馈进行调整。