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    Position determination in a wireles communication system with detection and compensation repeaters
    2.
    发明专利
    Position determination in a wireles communication system with detection and compensation repeaters 未知

    公开(公告)号：HK1061277A1

    公开(公告)日：2004-09-10

    申请号：HK04104297

    申请日：2004-06-15

    Applicant: QUALCOMM INC

    Inventor： MESSAY AMERGA ,  CHRISTOPHER PATRICK ,  ROLAND RICK ,  DOUGLAS ROWITCH ,  SAED YOUNIS

    IPC: G01S1/00 ,  G01S19/25 ,  H04B20060101 ,  H04B7/26 ,  H04W64/00

    Abstract: Techniques to detect whether or not a remote terminal is under the coverage of a repeater within a wireless communication network, which may be based on (1) a list of base stations expected to be received while under the repeater's coverage, (2) the characterized environment of the repeater, and/or (3) the propagation delays for a transmission received at the remote terminal. Additional ambiguity resulting from being under a repeater's coverage may also be accounted for and/or compensated by (1) discarding time measurements from repeated base stations, (2) adjusting the processing for position estimation to account for the additional ambiguity due to the repeater, (3) computing a series of position estimates based on multiple transmissions received from the same originating base station and selecting the best estimate, and/or (4) computing a series of position estimates based on multiple transmissions from multiple originating base stations and selecting the best estimate.

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    4.
    发明专利
    "TANSMITTER ARCHITECTURES FOR COMMUNICATIONS SYSTEMS" 未知

    公开(公告)号：MY127914A

    公开(公告)日：2006-12-29

    申请号：MYPI20010962

    申请日：2001-03-02

    Applicant: QUALCOMM INC

    Inventor： SAED YOUNIS ,  THOMAS WILBORN ,  DANIEL FILIPOVIC ,  JIAN LIN ,  EMILIJA SIMIC ,  HAITAO ZHANG ,  RALPH KAUFMAN

    IPC: H04B1/04 ,  H03G3/20 ,  H04L27/04 ,  H03G3/30 ,  H04B7/005 ,  H04B7/24

    Abstract: TRANSMITTER ARCHITECTURES FOR A COMMUNICATIONS SYSTEM HAVING IMPROVED PERFORMANCE OVER CONVENTIONAL TRANSMITTER ARCHITECTURES.THE IMPROVEMENTS INCLUDE A COMBINATION OF THE FOLLOWING: FASTER RESPONSE TIME FOR THE CONTROL SIGNALS (PA_ON, PA_R, PA_RI, PA_RU, VGA_GAIN, TX_AGC, OS_GAIN), IMPROVED LINEARITY, REDUCED INTERFERENCE, REDUCED POWER CONSUMPTION, LOWER CIRCUIT COMPLEXITY, AND LOWER COSTS. FOR A CELLULAR APPLICATION, THESE IMPROVEMENTS CAN LEAD TO INCREASED SYSTEM CAPACITY, SMALLER TELEPHONE SIZE, INCREASED TALK AND STANDBY TIMES, AND GREATER ACCEPTANCE OF THE PRODUCT. CIRCUITRY IS PROVIDED TO SPEED UP THE RESPONSE TIME OF A CONTROL SIGNAL. THE CONTROL LOOP FOR VARIOUS ELEMENTS IN THE TRANSMIT SIGNAL PATH ARE INTEGRATED. A GAIN CONTROL MECHANISM ALLOWS FOR ACCURATE ADJUSTMENT OF THE OUTPUT TRANSMIT POWER LEVEL. CONTROL MECHANISMS ARE PROVIDED TO POWER DOWN THE POWER AMPLIFIER (128, 840), OR THE ENTIRE TRANSMIT SIGNAL PATH, WHEN NOT NEEDED. THE GAINS OF THE VARIOUS ELEMENTS IN THE TRANSMIT SIGNAL PATH ARE CONTROLLED TO REDUCE TRANSIENTS IN THE OUTPUT TRANSMIT POWER, AND TO ALSO ENSURE THAT TRANSIENTS ARE DOWNWARD.(FIG 1)

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