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    21.
    发明专利
    未知

    公开(公告)号：ES2189809T3

    公开(公告)日：2003-07-16

    申请号：ES94932117

    申请日：1994-10-27

    Applicant: QUALCOMM INC

    Inventor： SIH GILBERT C ,  ANTONIO FRANKLIN P

    IPC: H03H21/00 ,  H04B3/23

    Abstract: An apparatus that automatically adjusts the adaptation block size for a least-mean square (LMS) adaptive filter depending on the input signal-to-noise ratio (SNR) is disclosed. The apparatus monitors the instantaneous SNR and continually adjusts the block size to provide high noise immunity, thereby increasing the convergence speed of the filter and decreasing the asymptotic mean-square error. An exemplary embodiment of the present invention is presented in the context of acoustic echo cancellation, though it is noted that the adaptive filter of the present invention is useful in any environment in which the noise characteristics are subject to change.

    24.
    发明专利
    未知

    公开(公告)号：NO20111586A

    公开(公告)日：2002-11-22

    申请号：NO20111586

    申请日：2011-11-18

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  WALLACE MARK ,  HOLTZMANN JACK ,  ANTONIO FRANKLIN P

    IPC: H04J1/05 ,  H04W28/16 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34

    CPC classification number: H04W52/343 ,  H04B17/336 ,  H04B17/382 ,  H04W52/24 ,  H04W52/241 ,  H04W52/244 ,  H04W52/267 ,  H04W52/286 ,  H04W52/346 ,  H04W72/1231 ,  H04W72/1242 ,  H04W72/1252

    Abstract: In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. For example, the loading conditions of the cells can be detected, and the resources can be reallocated and/or the reuse scheme can be redefined. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users. Data transmissions can be scheduled based on user priorities, some fairness criteria, system requirements, and other factors. Users are assigned to available channels based on a number of channel assignment schemes. Channel metrics are also provided, which can be used to prioritize users and for channel assignments.

    25.
    发明专利
    未知

    公开(公告)号：NO20024635A

    公开(公告)日：2002-11-22

    申请号：NO20024635

    申请日：2002-09-27

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  WALLACE MARK S ,  HOLTZMAN JACK M ,  ANTONIO FRANKLIN P

    IPC: H04J1/05 ,  H04B7/005 ,  H04B7/26 ,  H04J3/00 ,  H04J11/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04Q7/36

    CPC classification number: H04W52/343 ,  H04B17/336 ,  H04B17/382 ,  H04W52/24 ,  H04W52/241 ,  H04W52/244 ,  H04W52/267 ,  H04W52/286 ,  H04W52/346 ,  H04W72/1231 ,  H04W72/1242 ,  H04W72/1252

    Abstract: In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. For example, the loading conditions of the cells can be detected, and the resources can be reallocated and/or the reuse scheme can be redefined. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users. Data transmissions can be scheduled based on user priorities, some fairness criteria, system requirements, and other factors. Users are assigned to available channels based on a number of channel assignment schemes. Channel metrics are also provided, which can be used to prioritize users and for channel assignments.

    26.
    发明专利
    未知

    公开(公告)号：BR9915144A

    公开(公告)日：2002-01-02

    申请号：BR9915144

    申请日：1999-11-09

    Applicant: QUALCOMM INC

    Inventor： ANTONIO FRANKLIN P ,  SCHIFF LEONARD N ,  AMES WILLIAM G

    IPC: H04J11/00 ,  H04B7/06 ,  H04B7/10 ,  H04B7/185 ,  H04J3/00

    Abstract: The information signals are transferred to end users, customers, or service subscribers using at least two signal sources, generally satellites, and polarized radiation. Two polarization modes are employed, with the preferred modes being left-hand and right-hand circularly polarized radiation, although other polarization modes may be employed. The total number of channels can be divided among the polarization modes and transferred to end users either through the use of polarization switching in the receivers to selectively switch between the satellites, or by switching elements in the satellites (sources) to switch between polarization modes used for transmission.

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