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    41.
    发明专利
    未知

    公开(公告)号：AT450084T

    公开(公告)日：2009-12-15

    申请号：AT98956104

    申请日：1998-10-09

    Applicant: QUALCOMM INC

    Inventor： HARMS BRIAN ,  BUTLER BRIAN ,  SKINNER GORDON DI

    IPC: H04J13/12 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B7/216 ,  H04J13/00

    Abstract: A technique for spreading information signals in a spread spectrum communication system to provide increased signal acquisition speed. A first PN spreading code or code set is used to spread information signals along with a second PN spreading code sequence or function. The second PN code is synchronized with the first PN spreading code, but has a larger code period so that each code chip of the second PN code extends over the entire period of the first PN code. The longer period spreading code forms an outer code which helps provide unambiguous beam identification and easily acquired frame timing in the presence of dynamically changing signal path delay, improving signal acquisition.

    42.
    发明专利
    未知

    公开(公告)号：DE69940514D1

    公开(公告)日：2009-04-16

    申请号：DE69940514

    申请日：1999-07-21

    Applicant: QUALCOMM INC

    Inventor： ANTONIO FRANKLIN P ,  MARSH GENE W ,  STEWART RICHARD A ,  BJEREDE MARIE M ,  CHOCKALINGAM ANANTHANARAYANAN ,  KERNS ARTHUR S ,  BUTLER BRIAN ,  GROB MATTHEW S ,  DETERMAN JAMES T ,  GROVER DOUGLAS ,  SCHIFF LEONARD N ,  AMES WILLIAM G

    IPC: H04B7/02 ,  H04B7/26 ,  H04B7/185 ,  H04Q7/36

    Abstract: A method for reducing call dropping rates in a multi-beam communication system. The multi-beam communication system includes a user terminal, a gateway, and a plurality of beam sources, where each beam source projects a plurality of beams, and where a communication link between the user terminal and the gateway is established on one or more beams. The method according to the present invention relies on a messaging protocol between the gateway and the user terminal. Based on messages sent from the user terminal to the gateway, preferably on a preselected periodic basis, the gateway can determine the more desirable beam(s) for transmitting data or information to the user terminal. The messages sent from the user terminal to the gateway contain values representing beam strengths as measured at the user terminal. The gateway uses the user terminal measured beam strengths to select the beams that should be used for transmitting data or information to the user terminal. The beams that should be used are the beams that if used will decrease the call dropping rates and provide a desired level of beam source diversity.

    43.
    发明专利
    未知

    公开(公告)号：AT367064T

    公开(公告)日：2007-08-15

    申请号：AT98924967

    申请日：1998-05-29

    Applicant: QUALCOMM INC

    Inventor： BUTLER BRIAN ,  GILHOUSEN KLEIN

    IPC: H04B7/26 ,  H04L1/00 ,  H04W4/12 ,  H04W48/12 ,  H04W52/02 ,  H04W68/00 ,  H04W68/02 ,  H04W68/08 ,  H04W76/02 ,  H04W84/04 ,  H04W84/08

    Abstract: The method pages (fig 2) a wireless terminal in a wireless telecommunications system and transmits a quick page message via a less encoded channel and generates a full page message via a more encoded channel. The quick page massege contains less information than the full page message. The quick page message is for notifying the wireless terminal to begin processing for the full page message, and comprises a single bit of data. The full page message is transmitted during a second time slot assigned to the wireless terminal that occurs after the first time slot.

    Time tracking in a non-negligible multipath spacing environment
    45.
    发明专利
    Time tracking in a non-negligible multipath spacing environment 未知

    公开(公告)号：HK1063114A1

    公开(公告)日：2004-12-10

    申请号：HK04105862

    申请日：2004-08-06

    Applicant: QUALCOMM INC

    Inventor： RICK ROLAND ,  SUBRAHMANYA PARVATHANATHAN ,  BUTLER BRIAN ,  PATEL SHIMMAN ,  EKVETCHAVIT THUNYACHATE

    IPC: H04B7/06 ,  H04B7/08

    Abstract: In an antenna diversity environment, the timing offset of the receiver's fingers are based on the timing offset of the received peaks of the base station transmit signals. In a system with non-negligible multipath spacing, the timing offset of the received peaks of the base station transmit signals are not necessarily at the same location. In one embodiment, the demodulating elements for the signal from each base station antenna use the same offset for demodulating and determining an error signal based on pilot signal sampling prior to the timing offset and subsequent to the timing offset. The error signals are averaged and used by a time tracking loop to track the incoming signal. In another embodiment, the demodulating elements for the signal from each base station antenna independently time track the signals with different timing offsets for each finger. The preferred embodiment depends on the method used by the base station to multiplex the data onto multiple transmit antennas.

    CIRCUITO DE RASTREO DE FRECUENCIA AJUSTADO POR DOPPLER DE TRAYECTORIA MULTIPLE.
    47.
    发明专利
    CIRCUITO DE RASTREO DE FRECUENCIA AJUSTADO POR DOPPLER DE TRAYECTORIA MULTIPLE. 未知

    公开(公告)号：MXPA02007218A

    公开(公告)日：2003-02-12

    申请号：MXPA02007218

    申请日：2001-01-26

    Applicant: QUALCOMM INC

    Inventor： BUTLER BRIAN

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

    Abstract: Cada dedo de un receptor de INCIDENCIA computarizara un error de frecuencia para dicho dedo. El promedio ponderado de todos estos errores de frecuencia se calcula y filtra para proporcionar una se+- al de control para variar la frecuencia de los sintetizadores de frecuencia IF y RF, tomando en cuenta la compensacion de frecuencia comun observada en cada dedo. Ademas, cada dedo esta equipado con un rotador para proporcionar un ajuste de frecuencia especifico a dicho dedo. La frecuencia de cada dedo es ajustado a traves de la retro-alimentacion del error de frecuencia de dicho dedo.

    TIME TRACKING IN A NON-NEGLIGIBLE MULTIPATH SPACINTIME TRACKING IN A NON-NEGLIGIBLE MULTIPATH SPACING ENVIRONMENT G ENVIRONMENT
    48.
    发明专利
    TIME TRACKING IN A NON-NEGLIGIBLE MULTIPATH SPACINTIME TRACKING IN A NON-NEGLIGIBLE MULTIPATH SPACING ENVIRONMENT G ENVIRONMENT 未知

    公开(公告)号：CA2434116A1

    公开(公告)日：2002-08-08

    申请号：CA2434116

    申请日：2002-01-11

    Applicant: QUALCOMM INC

    Inventor： RICK ROLAND ,  BUTLER BRIAN ,  SUBRAHMANYA PARVATHANATHAN ,  PATEL SHIMMAN ,  EKVETCHAVAT THUNACHATE

    IPC: H04B7/06 ,  H04B7/08 ,  H04B1/707

    Abstract: In an antenna diverstiy environment, the timing offset of the receiver's fingers are based on the timing offset of the received peaks of the base station transmit signals. In a system with non-neglible multipath spacing, t he timing offset of the received peaks of the base station transmit signals are not necessarily at the same location. In one embodiment, the demodulating elements for the signal from each base station antenna use the same offset f or demodulating and determining an error signal based on pilot signal sampling prior to the timing offset and subsequent to the timing offset. The error signals are averaged and used by a time trackin loop to track the incoming signal. In another embodiment, the demodulating elements for the signal from each base station antenna independently time track the signals with differen t times offsets for each finger. The preferred embodiment depends on the metho d used by the base station to multiplex the data onto multiple transmit antenn as.

    MULTIPATH DOPPLER-ADJUSTED FREQUENCY TRACKING LOOP
    50.
    发明专利
    MULTIPATH DOPPLER-ADJUSTED FREQUENCY TRACKING LOOP 未知

    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.

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