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    Speed-based, hybrid parametric/non-parametric equalization
    85.
    发明专利
    Speed-based, hybrid parametric/non-parametric equalization 未知

    公开(公告)号：AU2008334776A1

    公开(公告)日：2009-06-18

    申请号：AU2008334776

    申请日：2008-12-01

    Applicant: ERICSSON TELEFON AB L M

    Inventor： CAIRNS DOUGLAS A ,  WATABE HIROAKI ,  JONSSON ELIAS ,  UESAKA KAZUYOSHI

    IPC: H04B1/707

    Abstract: A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is currently operating in a nonparametric mode and its speed exceeds a first predetermined threshold, the mobile receiver switches to a parametric mode. Conversely, if the mobile receiver is currently in parametric mode and its speed is less than a second predetermined threshold, the mobile receiver switches to nonparametric mode. In one embodiment, the speed may be estimated by a Doppler frequency in the received signal, and the thresholds are Doppler frequencies. In one embodiment, the first and second thresholds are different, creating a hysteresis in the mode switching.

    A METHOD AND APPARATUS FOR RECEIVED SIGNAL QUALITY ESTIMATION
    86.
    发明专利
    A METHOD AND APPARATUS FOR RECEIVED SIGNAL QUALITY ESTIMATION 未知

    公开(公告)号：HK1103879A1

    公开(公告)日：2007-12-28

    申请号：HK07108135

    申请日：2007-07-26

    Applicant: ERICSSON TELEFON AB L M

    Inventor： JONSSON ELIAS

    IPC: H04B1/707 ,  H04L20060101 ,  H04L1/00 ,  H04L1/20 ,  H04L5/12 ,  H04L25/03

    Abstract: A processing circuit and method generate signal quality estimates based on scaling measured inter-symbol interference (ISI) in a received signal according to a cancellation metric corresponding to ISI cancellation performance of the receiver. By accounting for ISI cancellation performance of the receiver based on a simple scaling metric, accurate received signal quality measurements are obtained in a manner that accounts for un-cancelled ISI in the received signal without requiring use of potentially complex multipath combining weight calculations in the signal quality calculation. Signal quality estimation results may be used for sending corresponding Channel Quality Indicators, communication link transmit power control commands, etc. In some embodiments, the cancellation metric is maintained as a dynamic value based on measured ISI cancellation performance, while in other embodiments the cancellation metric comprises a pre-configured value stored in memory, for example.

    89.
    发明专利
    未知

    公开(公告)号：AT350809T

    公开(公告)日：2007-01-15

    申请号：AT03756463

    申请日：2003-09-19

    Applicant: ERICSSON TELEFON AB L M

    Inventor： BERNHARDSSON BO ,  HRNJEZ TATJANA ,  JONSSON ELIAS ,  OHLSSON JONAS ,  ZIREN MIKAEL

    IPC: H03J7/04

    Abstract: An automatic frequency control (AFC) system in an electronic device is operated by using an AFC-algorithm component to determine a frequency error corresponding to a difference between a frequency of a signal output from a signal generator and a received signal frequency. The frequency error determined by the AFC-algorithm component is multiplied by a scaling factor, which is set to zero after an adjustment has been made to change a frequency of the signal output from the signal generator. The scaling factor is increased from zero to one over time. The scaled frequency error is used to determine whether to adjust the frequency of the signal output from the signal generator.

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