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    METHOD OF DYNAMICALLY MODIFYING CONTROL PARAMETERS IN A TRANSMITTER POWER CONTROL SYSTEM AND CIRCUITRY THEREFOR
    192.
    发明专利
    METHOD OF DYNAMICALLY MODIFYING CONTROL PARAMETERS IN A TRANSMITTER POWER CONTROL SYSTEM AND CIRCUITRY THEREFOR 未知

    公开(公告)号：PL309726A1

    公开(公告)日：1995-11-13

    申请号：PL30972694

    申请日：1994-02-01

    Applicant: QUALCOMM INC

    Inventor： PADOVANI ROBERTO ,  ZIV NOAM

    IPC: H04B1/40 ,  H04B7/005 ,  H04B7/26 ,  H04J13/00 ,  H04L1/00 ,  H04L1/08 ,  H04L25/02

    Abstract: In a communication system in which direct sequence spread spectrum modulation techniques are used interference is generated in communications by remote stations since the communications share the same frequency spectrum. In order to increase system capacity the power level of the remote station transmitters are controlled by the local station. A setpoint is generated by the local station and compared with the remote station signal strength measured at the local station. The result of this comparison is used to generate power level adjustment commands which are sent to the remote station. The remote station is responsive to the power level adjustment commands for increasing or decreasing remote station transmitter power. In a spread spectrum communication system in which data is encoded at variable data rates, the local station determines the rate at which received data was encoded by the transmitting remote station. The data is decoded at each possible rate with error metrics generated that are representative of the quality of the data decoded at each rate. A rate decision algorithm is used to evaluate the error metrics and make a decision on the rate at which the data was transmitted. A pattern match of rate decisions is used to modify a setpoint so as to closely control the transmitting power of the remote station as a function of the quality of the received data.

    193.
    发明专利
    未知

    公开(公告)号：FI953501A

    公开(公告)日：1995-07-20

    申请号：FI953501

    申请日：1995-07-20

    Applicant: QUALCOMM INC

    Inventor： WHEATLEY III CHARLES E ,  PADOVANI ROBERTO ,  ZEHAVI EPHRAIM

    IPC: H04J13/04 ,  H03M13/23 ,  H04B20060101 ,  H04B7/005 ,  H04B7/216 ,  H04B7/24 ,  H04L1/00 ,  H04L1/08 ,  H04B ,  H04L

    Abstract: A method for providing power control with variable data rate, the method comprising: receiving a data frame having an input data rate selected from a plurality of possible input data rates; selecting an encoding rate based on the input data rate; encoding data frames to produce output symbols, repeating output symbols using first and second generating polynomials and multiplexing the repeated output symbols, selecting a puncturing format to puncture data bits and producing output data having a constant output data rate for a number of possible input data rates based on a combination of input data rates, selected encoding rate and selected puncturing format for providing said variable data rate communication link; determining a frame error rate for a number of possible input data rates; calculating differences between the frame error rates and a target error rate and adjusting the power depending on whether the difference is greater, equal or less than a predetermined threshold.

    METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM
    198.
    发明专利
    METHOD AND APPARATUS FOR CONTROLLING TRANSMISSION POWER IN A CDMA CELLULAR MOBILE TELEPHONE SYSTEM 未知

    公开(公告)号：HUT66044A

    公开(公告)日：1994-09-28

    申请号：HU9303239

    申请日：1992-05-17

    Applicant: QUALCOMM INC

    Inventor： PADOVANI ROBERTO ,  GILHOUSEN KLEIN S ,  WHEATLEY CHARLES E III ,  WEAVER LINDSAY A ,  BLAKENEY ROBERT D II

    IPC: H04J13/00 ,  H04B7/005 ,  H04B7/26 ,  H04L27/30 ,  H04W52/00 ,  H04W52/02 ,  H04W52/06 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/34 ,  H04W52/36 ,  H04W52/40 ,  H04W52/52

    Abstract: A cellular communication system in which a system user and another user communicate with each other by way of information carrying spread spectrum modulated signals transmitted via a cell-site in which system: the system user comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said cell-site, a receiver for receiving information carrying spread spectrum modulated signals from said cell-site and means for measuring signal quality in said information carrying spread spectrum modulated signals received by the system user; the cell-site comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said system user, a receiver for receiving information carrying spread spectrum modulated signals from said system user and adjusting means for adjusting the power of information carrying spread spectrum modulated signals transmitted from the cell-site ; ; and power control means is provided for controlling the transmission power of the information carrying spread spectrum modulated signals by measuring the signal power in the information carrying spread spectrum modulated signals received by the system user and transmitting data representing the measured power to the cell-site by way of the information carrying spread spectrum modulated signals, the adjusting means being responsive to the data in the information carrying spread spectrum modulated signals from the system user to adjust the power in the information carrying spread spectrum modulated signals transmitted by the cell-site.

    Soft handoff in a CDMA cellular telephone system
    199.
    发明专利
    Soft handoff in a CDMA cellular telephone system 未知

    公开(公告)号：AU646421B2

    公开(公告)日：1994-02-24

    申请号：AU6904191

    申请日：1990-11-05

    Applicant: QUALCOMM INC

    Inventor： GILHOUSEN KLEIN S ,  PADOVANI ROBERTO ,  WHEATLEY CHARLES E III

    IPC: H04B1/707 ,  H04W36/18 ,  H04B7/14 ,  H04Q9/00 ,  H04B1/00 ,  H04B7/26

    Abstract: In a cellular telephone system a system for directing communications between a mobile user and cell-sites as a mobile user changes cell-site service areas. The mobile user includes an apparatus for, while in communication with another system user via one cell-site, determining a transition of the mobile user from the cell-site service area to the service area of another cell-site. The system includes circuitry responsive to the indication for coupling communications between the mobile user and the other system user via the new cell-site while the mobile user also remains in communication with the system user via the first cell-site. The system further includes apparatus responsive to the coupling of the communications between the mobile user and the other system user via the new cell-site for terminating the communications between the mobile user and another system user via cell-site with communications continuing between the mobile user and the system user via the new cell-site.

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