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    METHOD AND SYSTEM FOR CORRECTING CHANNEL DISTORTION, USING LAGRANGE'S POLYNOMINAL INTERPOLATION
    2.
    发明专利
    METHOD AND SYSTEM FOR CORRECTING CHANNEL DISTORTION, USING LAGRANGE'S POLYNOMINAL INTERPOLATION 失效

    公开(公告)号：JP2000253080A

    公开(公告)日：2000-09-14

    申请号：JP2000044007

    申请日：2000-02-22

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： QIU ROBERT CAIMING

    IPC: H04L27/00 ,  H04B1/04 ,  H04B1/707 ,  H04B7/01 ,  H04L25/02 ,  H04L25/03 ,  H04L27/22

    Abstract: PROBLEM TO BE SOLVED: To eliminate random noise and to make it difficult to be affected by noise by estimating a rapid amplitude and phase fluctuation in a digital mobile radio transmission system on the basis of the periodical insertion of a pilot signal into a data stream. SOLUTION: An input base band signal 500 is processed by a signal synchronous module 408 and a block synchronous module 406. The module 408 also controls an analog-digital sample circuit 410. Next, a complex synergy inverter 424 calculates the inverse number of the total sum 622 obtained as a result of addition. A delay circuit 526 generates a base band symbol sample 528 and there, delay is set so as to synchronize the base band symbol sample in the same sampling time. Next, a complex multiplier 430 multiplies the output of the inverter 424 by the sample 528 to generate the estimated value of an original data symbol 632.

    TECHNOLOGY FOR CONTROLLING OUTPUT BASED ON CHANNEL PARAMETER MEASUREMENT
    3.
    发明专利
    TECHNOLOGY FOR CONTROLLING OUTPUT BASED ON CHANNEL PARAMETER MEASUREMENT 审中-公开

    公开(公告)号：JP2002124917A

    公开(公告)日：2002-04-26

    申请号：JP2001247522

    申请日：2001-08-17

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CHEN TAI-ANN ,  KYPING LEE ,  MEYERS MARTIN HOWARD ,  QIU ROBERT CAIMING ,  WEAVER CARL FRANCIS

    IPC: H04L1/00 ,  H04B7/005 ,  H04B7/26 ,  H04J13/00

    Abstract: PROBLEM TO BE SOLVED: To allow an external output control loop method for setting a target SIR using a measured FER to work sufficiently in a high-speed fading state. SOLUTION: A method for accelerating the output control using a channel state estimation scheme is provided, wherein the estimation of channel state is equivalent to measuring or estimating channel parameters including the speed of a moving station, Doppler diffusion, K factor, the number of multiplexed channels, and the intensity of each of multiplexed channel, but not limited to these parameters. One or more relation between the channel state and a target signal-to-interference ratio or between other control thresholds are determined. Using the determined relations, the target signal-to-interference ratio or other control thresholds are set. This method has the advantage of estimating or measuring the channel state at much shorter time intervals than service quality parameters such as a frame error rate and bit error rate, accelerating the output control and increasing the system capacity.

    OUTPUT CONTROL TECHNOLOGY IN SMART STEP SIZE BASED ON CHANNEL PARAMETER MEASUREMENT
    4.
    发明专利
    OUTPUT CONTROL TECHNOLOGY IN SMART STEP SIZE BASED ON CHANNEL PARAMETER MEASUREMENT 审中-公开

    公开(公告)号：JP2002077044A

    公开(公告)日：2002-03-15

    申请号：JP2001247592

    申请日：2001-08-17

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CHEN TAI-ANN ,  MEYERS MARTIN HOWARD ,  QIU ROBERT CAIMING

    IPC: H04J13/00 ,  H04B7/005 ,  H04B7/26

    Abstract: PROBLEM TO BE SOLVED: To discriminate in real time a optimum up-transmission step size and an optimum down-transmission step size as functions of wireless environment parameters. SOLUTION: This invention provides a method for discriminating in real time an optimum transmission step size as a function of one wireless environmental parameter or more by using a channel state estimate scheme, the channel state estimate includes a speed of a mobile station, Doppler spread, a K factor, number of multi-paths, and strength of each multi-path but this invention provides a method equivalent to measure or estimate a channel parameter not limited to them. The channel state is used for estimation to discriminate the optimum transmission step size, which can be on the basis of a desired service quality parameter. Increasing or decreasing a transmission output level by a quantity nearly equal to the optimum transmission step size when the optimum transmission step size is discriminated adjusts the transmission output level.

    5.
    发明专利
    未知

    公开(公告)号：BR0003985A

    公开(公告)日：2001-04-17

    申请号：BR0003985

    申请日：2000-09-04

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ZHU PENGFEI ,  JIANG FRANCIS ,  QIU ROBERT CAIMING ,  WANG LIWA

    IPC: H04B7/005 ,  H04B7/26 ,  H04W52/08 ,  H04W52/14 ,  H04W52/32 ,  H04W52/50 ,  H04Q7/38

    Abstract: A method for adjusting the power of a probe signal to be transmitted by user equipment to system equipment of a wireless communication system. The power of the probe signal is adjusted based on information received by the user equipment from the system equipment. The information is a local mean of RSSI at the system equipment. The adjusted probe signal is transmitted and thus has an increased likelihood of being detected by the system equipment. Also, the power available for transmitting the probe signal is used more efficiently when the probe signal is adjusted in accordance with the local mean information received by the user equipment from system equipment of the wireless communication system.

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