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    PILOT-DIRECTED AND PILOT/DATA-DIRECTED EQUALIZERS
    2.
    发明申请
    PILOT-DIRECTED AND PILOT/DATA-DIRECTED EQUALIZERS 审中-公开
    先导式和先导式/数据导向式均衡器

    公开(公告)号：WO2006052564A3

    公开(公告)日：2006-11-16

    申请号：PCT/US2005039547

    申请日：2005-11-01

    Applicant: INTERDIGITAL TECH CORP ,  PAN JUNG-LIN ,  BELURI MIHAELA C ,  PIETRASKI PHILIP J

    Inventor： PAN JUNG-LIN ,  BELURI MIHAELA C ,  PIETRASKI PHILIP J

    IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

    CPC classification number: H04L25/03038 ,  H04B1/712 ,  H04B2201/70701 ,  H04L25/03044 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

    Abstract: A normalized least means square (NLMS) equalizer including two equalizer filters is disclosed. In one embodiment, a single correction term generator is used to generate correction terms for tap coefficient updates of each of the equalizer filters based on a pilot signal. In another embodiment, two different correction term generators are used to generate correction terms for each of the equalizer filters, whereby one of the correction term generators uses data received from a hard decision unit at the output of one of the equalizer filters to generate correction terms for both of the equalizer filters.

    Abstract translation: 公开了包括两个均衡器滤波器的归一化最小均方（NLMS）均衡器。 在一个实施例中，单个校正项生成器被用于基于导频信号生成每个均衡器滤波器的抽头系数更新的校正项。 在另一个实施例中，使用两个不同的校正项发生器来为每个均衡器滤波器产生校正项，由此校正项发生器中的一个使用从在均衡器滤波器之一的输出处的硬判决单元接收的数据来产生校正项 用于两个均衡器滤波器。

    PILOT-DIRECTED AND PILOT/DATA-DIRECTED EQUALIZERS
    4.
    发明专利
    PILOT-DIRECTED AND PILOT/DATA-DIRECTED EQUALIZERS 未知

    公开(公告)号：CA2586199A1

    公开(公告)日：2006-05-18

    申请号：CA2586199

    申请日：2005-11-01

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PAN KYLE JUNG-LIN ,  BELURI MIHAELA C ,  PIETRASKI PHILIP J

    IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

    Abstract: A normalized least means square (NLMS) equalizer including two equalizer filters is disclosed. In one embodiment, a single correction term generator is used to generate correction terms for tap coefficient updates of each of the equalizer filters based on a pilot signal. In another embodiment, two different correction term generators are used to generate correction terms for each of the equalizer filters, whereby one of the correction term generators uses data received from a hard decision unit at the output of one of the equalizer filters to generate correction terms for both of the equalizer filters.

    METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER
    7.
    发明专利
    METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER 未知

    公开(公告)号：CA2586703A1

    公开(公告)日：2006-05-18

    申请号：CA2586703

    申请日：2005-10-20

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  DEMIR ALPASLAN ,  BELURI MIHAELA C

    IPC: H03H7/30

    Abstract: A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another transceiver. The step-size estimator includes a speed estimator, a signal-to-noise ratio (SNR) averager and a step-size mapping unit. The speed estimator is used to estimate the apparent speed of the channel, (i.e., the observed and/or measured rate of change of the channel impulse response). The SNR averager generates a common pilot channel (CPICH) SNR estimate. The step-size mapping unit uses the speed estimate and the CPICH SNR estimate to generate a step-size parameter, µ, and a filter taps leakage factor parameter, ±, used by the adaptive equalizer to update the filter tap coefficient.

    METODO Y APARATO PARA ESTIMAR EL PASO DE PROGRESION DE UN ECUALIZADOR ADAPTIVO.
    10.
    发明专利
    METODO Y APARATO PARA ESTIMAR EL PASO DE PROGRESION DE UN ECUALIZADOR ADAPTIVO. 未知

    公开(公告)号：MX2007005532A

    公开(公告)日：2007-07-13

    申请号：MX2007005532

    申请日：2005-10-20

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA C ,  DEMIR ALPASIAN

    IPC: H03H7/00

    Abstract: Un estimador de paso de progresion para controlar el paso de progresion de un ecualizador adaptivo incorporado en un transceptor, (por ejemplo, una unidad de transmision/recepcion inalambrica (WTRU)).El estimador de paso de progresion actualiza al menos una conexion del ecualizador adaptivo utilizada por el ecualizador adaptivo en base a una velocidad aparente de un canal establecido entre el transceptor y otro transceptor. El estimador de paso de progresion incluye un estimador de velocidad, un medidor de proporcion de senal a ruido (SNR) y una unidad de trazo de paso de progresion. El estimador de velocidad de utiliza para estimar la velocidad aparente del canal, (es decir, la velocidad observada y/o medida de cambio de la respuesta de impulso del canal). El medidor SNR genera un estimado SNR de canal piloto comun (CPICH). La unidad de trazo de paso de progresion utiliza el estimado de velocidad y el estimado SNR CPICH para generar un parametro de paso de progresion,??, y un parametro de factor de dispersion de conexiones de filtro,a, utilizado por el ecualizador adaptativo para ecualizar el coeficiente de conexion de filtro.

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