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    APPROXIMATE CHOLESKY DECOMPOSITION BASED BLOCK LINEAR EQUALIZER
    1.
    发明申请
    APPROXIMATE CHOLESKY DECOMPOSITION BASED BLOCK LINEAR EQUALIZER 审中-公开
    基于块状分解的块状线性均衡器

    公开(公告)号：WO2007015804A3

    公开(公告)日：2007-05-18

    申请号：PCT/US2006027668

    申请日：2006-07-17

    Applicant: INTERDIGITAL TECH CORP ,  DIFAZIO ROBERT A ,  PAN JUNG-LIN ,  BELURI MIHAELA ,  LI BIN

    Inventor： DIFAZIO ROBERT A ,  PAN JUNG-LIN ,  BELURI MIHAELA ,  LI BIN

    IPC: H04B7/10

    CPC classification number: H04L25/03012 ,  H04L25/0206 ,  H04L2025/03605

    Abstract: A block linear equalizer (BLE) using an approximate Cholesky decomposition is disclosed. The BLE includes channel estimators, a channel monitor unit, a noise power estimator, a parameter selection unit and an approximate Cholesky processor. The channel estimator generates a channel estimate vector from received samples. The channel monitor unit generates a first channel monitor signal for a truncated channel estimate vector and a second channel monitor signal. The noise power estimator estimates a noise power of the received samples. The parameter selection unit selects parameters for approximate Cholesky decomposition based on the first and second channel monitor signals. The approximate Cholesky processor performs block linear equalization on the received samples based on approximate Cholesky decomposition.

    Abstract translation: 公开了使用近似Cholesky分解的块线性均衡器（BLE）。 BLE包括信道估计器，信道监测单元，噪声功率估计器，参数选择单元和近似的Cholesky处理器。 信道估计器从接收样本生成信道估计向量。 信道监视单元产生用于截断的信道估计向量和第二信道监视信号的第一信道监视信号。 噪声功率估计器估计接收样本的噪声功率。 参数选择单元基于第一和第二通道监视信号选择近似Cholesky分解的参数。 大约Cholesky处理器基于近似Cholesky分解对接收到的样本执行块线性均衡。

    METHOD AND APPARATUS FOR COMPENSATING FOR PHASE NOISE OF SYMBOLS SPREAD WITH A LONG SPREADING CODE
    3.
    发明申请
    METHOD AND APPARATUS FOR COMPENSATING FOR PHASE NOISE OF SYMBOLS SPREAD WITH A LONG SPREADING CODE 审中-公开
    用于补充符号扩展与长期扩展代码的相位噪声的方法和装置

    公开(公告)号：WO2006101703A2

    公开(公告)日：2006-09-28

    申请号：PCT/US2006007827

    申请日：2006-03-06

    Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA ,  YANG RUI ,  CHINCHOLI AMITH VIKRAM ,  KEARNEY KENNETH P

    Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  YANG RUI ,  CHINCHOLI AMITH VIKRAM ,  KEARNEY KENNETH P

    IPC: H04B1/707

    CPC classification number: H04B1/707 ,  H04B2201/70701

    Abstract: A method and apparatus for compensating for phase noise of symbols spread with a long spreading code are disclosed. To compensate for the phase noise, a phase error estimate is generated from despread symbols with a short spreading code. A phase correcting phasor is applied to chip rate data before despreading the data with a long spreading code. A signal-to-interference ratio (SIR) on a common pilot channel (CPICH) may be calculated by spreading the data with a parent spreading code in an orthogonal variable spreading factor (OVSF) code tree and by combining symbols. Alternatively, a magnitude of the symbols may be used in estimating the SIR. The SIR of a channel using a short spreading code and an SIR of a channel using a long spreading code are measured. The SIR of the channel with the long spreading code may be compensated in accordance with a difference between degradation of the SIRs.

    Abstract translation: 公开了一种用于补偿以扩展码扩展的符号的相位噪声的方法和装置。 为了补偿相位噪声，从具有短扩展码的解扩符号产生相位误差估计。 在用扩展码长的数据解扩之前，将相位校正相量应用于码片速率数据。 可以通过在正交可变扩展因子（OVSF）码树中扩展具有父扩展码的数据并通过组合符号来计算公共导频信道（CPICH）上的信号干扰比（SIR）。 或者，可以在估计SIR时使用符号的大小。 测量使用短扩展码的信道的SIR和使用长扩展码的信道的SIR。 具有长扩展码的信道的SIR可以根据SIR的劣化之间的差异来补偿。

    NORMALIZED LEAST MEAN SQUARE CHIP-LEVEL EQUALIZATION ADVANCED DIVERSITY RECEIVER
    4.
    发明申请
    NORMALIZED LEAST MEAN SQUARE CHIP-LEVEL EQUALIZATION ADVANCED DIVERSITY RECEIVER 审中-公开
    正规化最小平均平方芯片级均衡高级多样性接收器

    公开(公告)号：WO2006052407A3

    公开(公告)日：2007-04-12

    申请号：PCT/US2005037656

    申请日：2005-10-18

    Applicant: INTERDIGITAL TECH CORP ,  ZEIRA ARIELA ,  PIETRASKI PHILIP J ,  PAN JUNG-LIN ,  BELURI MIHAELA ,  YANG RUI

    Inventor： ZEIRA ARIELA ,  PIETRASKI PHILIP J ,  PAN JUNG-LIN ,  BELURI MIHAELA ,  YANG RUI

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

    CPC classification number: H04L25/03044 ,  H04B1/7097 ,  H04B7/0854 ,  H04L2025/03375 ,  H04L2025/03426 ,  H04L2025/03477 ,  H04L2025/03509 ,  H04L2025/03617

    Abstract: A receiver which includes at least one equalizer filter and a tap coefficients generator for implementing receive diversity. The equalizer filter processes a signal derived from signals received by a plurality of antennas. In one embodiment, sample data streams from the antennas are merged into one sample data stream. The merged sample data stream is processed by a single extended equalizer filter, whereby filter coefficients are adjusted in accordance with a joint error signal. A filter coefficient correction term used by the equalizer filter is generated by the tap coefficients generator using a normalized least mean square (NLMS) algorithm. In another embodiment, a plurality of equalizer filters are utilized, whereby each equalizer receives a sample data stream from a specific one of the antennas. In yet another embodiment, the sample data streams are combined after being processed by a plurality of matched filters based on respective estimated channel impulse responses.

    Abstract translation: 包括至少一个均衡器滤波器和用于实现接收分集的抽头系数发生器的接收机。 均衡器滤波器处理由多个天线接收的信号导出的信号。 在一个实施例中，来自天线的采样数据流被合并成一个采样数据流。 合并的采样数据流由单个扩展均衡器滤波器处理，由此根据联合误差信号调整滤波器系数。 由均衡器滤波器使用的滤波器系数校正项由抽头系数发生器使用归一化最小均方（NLMS）算法生成。 在另一个实施例中，利用多个均衡器滤波器，由此每个均衡器从特定天线接收采样数据流。 在另一个实施例中，基于相应的估计的信道脉冲响应，在由多个匹配滤波器处理之后组合采样数据流。

    METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER
    5.
    发明申请
    METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER 审中-公开
    用于估计自适应均衡器的步长的方法和装置

    公开(公告)号：WO2006052404A3

    公开(公告)日：2007-02-22

    申请号：PCT/US2005037602

    申请日：2005-10-20

    Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN

    Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN

    IPC: H03H7/30

    CPC classification number: H04L25/03019 ,  H04B2201/70701 ,  H04L2025/03687

    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, a, used by the adaptive equalizer to update the filter tap coefficient.

    Abstract translation: 用于控制结合在收发器（例如，无线发射/接收单元（WTRU））中的自适应均衡器的步长的步长估计器。 步长估计器基于在收发器和另一收发器之间建立的通道的视在速度来更新由自适应均衡器使用的至少一个自适应均衡器抽头。 步长估计器包括速度估计器，信噪比（SNR）平均器和步长映射单元。 速度估计器用于估计信道的视在速度（即，观测和/或测量的信道脉冲响应的变化速率）。 SNR平均器生成公共导频信道（CPICH）SNR估计。 步进大小映射单元使用速度估计和CPICH SNR估计来生成步长大小参数μ和由自适应均衡器使用的滤波器抽头泄漏因子参数a，以更新滤波器抽头系数。

    METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER
    6.
    发明申请
    METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER 审中-公开
    用于估计和校正接收器中基带频率误差的方法和装置

    公开(公告)号：WO2006052398A3

    公开(公告)日：2007-05-31

    申请号：PCT/US2005037416

    申请日：2005-10-19

    Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA ,  DEMIR ALPASLAN

    Inventor： PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA ,  DEMIR ALPASLAN

    IPC: H04B1/00 ,  H04L27/06

    CPC classification number: H04B1/7097 ,  H04B1/712 ,  H04L25/03248

    Abstract: A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. In another embodiment, a channel estimator performs channel estimation and generates Rake receiver finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights.

    Abstract translation: 一种用于估计和校正接收机中的基带频率误差的方法和装置。 在一个实施例中，均衡器对采样数据流执行均衡，并且基于均衡产生滤波器抽头值。 基于滤波器抽头值中的至少一个产生估计的频率误差信号。 基于估计的频率误差信号产生旋转相量。 将旋转相量信号与样本数据流相乘以校正样本数据流的频率。 在另一个实施例中，信道估计器执行信道估计，并且基于手指权重中的至少一个产生Rake接收机手指权重。 基于手指权重中的至少一个生成估计的频率误差信号。

    METHOD AND APPARATUS FOR GENERATING EQUALIZER FILTER TAP COEFFICIENTS
    7.
    发明申请
    METHOD AND APPARATUS FOR GENERATING EQUALIZER FILTER TAP COEFFICIENTS 审中-公开
    用于产生均衡器滤波器系数的方法和装置

    公开(公告)号：WO2006052406A2

    公开(公告)日：2006-05-18

    申请号：PCT/US2005037654

    申请日：2005-10-18

    Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA

    Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA

    IPC: H03H7/30

    CPC classification number: H04L25/03038 ,  H04B1/7097 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

    Abstract: A method and apparatus generating an error signal and an update vector signal used to generate filter tap coefficients for an equalizer filter residing in an equalizer. The equalizer filter outputs an equalized signal in response to receiving a sample data stream. The error signal is generated by down-sampling the equalized signal, subtracting the equalized signal from a reference signal, and filtering and down-sampling the resulting signal. Simultaneously, the update vector signal is generated by converting scalar samples of the sample data stream to a data vector signal and descrambling, filtering, and down-sampling the data vector signal. A tap coefficients generator is used to generate the filter tap coefficients for updating the equalizer filter based on the error signal and the update vector signal.

    Abstract translation: 一种产生误差信号的方法和装置，以及用于产生驻留在均衡器中的均衡器滤波器的滤波器抽头系数的更新矢量信号。 均衡器滤波器响应于接收样本数据流而输出均衡的信号。 通过对均衡信号进行下采样，从参考信号中减去均衡信号，并对结果信号进行滤波和下采样，产生误差信号。 同时，通过将样本数据流的标量样本转换为数据矢量信号并对数据矢量信号进行解扰，滤波和下采样来生成更新矢量信号。 抽头系数发生器用于基于误差信号和更新矢量信号产生用于更新均衡器滤波器的滤波器抽头系数。

    METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER
    8.
    发明公开
    METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER 审中-公开
    方法和装置在接收机中估计和校正的基带频率误差

    公开(公告)号：EP1815601A4

    公开(公告)日：2008-01-23

    申请号：EP05813289

    申请日：2005-10-19

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA ,  DEMIR ALPASLAN

    IPC: H04B1/707 ,  H04B1/00 ,  H04L27/06

    CPC classification number: H04B1/7097 ,  H04B1/712 ,  H04L25/03248

    Abstract: A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. In another embodiment, a channel estimator performs channel estimation and generates Rake receiver finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights.

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