公开(公告)号：WO2006052406A3

公开(公告)日：2006-05-18

申请号：PCT/US2005/037654

申请日：2005-10-18

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PIETRASKI, Philip, J. ,  BELURI, Mihaela

Inventor： PIETRASKI, Philip, J. ,  BELURI, Mihaela

IPC: H03H7/30

Abstract: A method and apparatus generating an error signal (156) and an update vector signal (124) used to generate filter tap coefficients (128) for an equalizer filter (130) residing in an equalizer (100). The equalizer filter (130) outputs an equalized signal (132) in response to receiving a sample data stream (102). The error signal (156) is generated by down-sampling (140) the equalized signal (132), subtracting (144) the equalized signal (132) from a reference signal (146) and filtering (150) and down-sampling (154) the resulting signal. Simultaneously, the update vector signal (124) is generated by converting scalar samples of the sample data stream (102) to a data vector signal (106) and descrambling 116, filtering (118), and down-sampling (122) the data vector signal (106). A tap coefficients generator (126) is used to generate the filter tap coefficients (128) for updating the equalizer filter (130) based on the error signal (156) and the update vector signal (124).

公开(公告)号：WO2007015804A2

公开(公告)日：2007-02-08

申请号：PCT/US2006/027668

申请日：2006-07-17

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DIFAZIO, Robert, A. ,  PAN, Jung-Lin ,  BELURI, Mihaela ,  LI, Bin

Inventor： DIFAZIO, Robert, A. ,  PAN, Jung-Lin ,  BELURI, Mihaela ,  LI, Bin

IPC: H04B1/00

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: 公开了使用近似乔列斯基分解的块线性均衡器（BLE）。 BLE包括信道估计器，信道监视器单元，噪声功率估计器，参数选择单元和近似Cholesky处理器。 信道估计器从接收的采样生成信道估计向量。 信道监视单元产生用于截断信道估计矢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信道监视信号来选择用于近似乔列斯基分解的参数。 近似Cholesky处理器根据近似Cholesky分解对接收样本执行块线性均衡。

公开(公告)号：WO2006101703A3

公开(公告)日：2006-09-28

申请号：PCT/US2006/007827

申请日：2006-03-06

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  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: H04B7/216

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.

公开(公告)号：WO2006052596A2

公开(公告)日：2006-05-18

申请号：PCT/US2005/039635

申请日：2005-11-02

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PIETRASKI, Philip, J. ,  BELURI, Mihaela ,  DEMIR, Alpaslan ,  PAN, Jung-Lin ,  STERNBERG, Gregory, S. ,  YANG, Rui ,  LI, Bin

Inventor： PIETRASKI, Philip, J. ,  BELURI, Mihaela ,  DEMIR, Alpaslan ,  PAN, Jung-Lin ,  STERNBERG, Gregory, S. ,  YANG, Rui ,  LI, Bin

IPC: H03H7/30

CPC classification number: H04L25/03038 ,  H04B1/7097 ,  H04L27/0014 ,  H04L2025/03509 ,  H04L2025/03547 ,  H04L2025/03585 ,  H04L2025/03611 ,  H04L2025/03617 ,  H04L2025/03687 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0065

Abstract: An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal.

Abstract translation: 公开了一种包括均衡器滤波器和用于处理从多个接收信号导出的采样数据流的抽头系数发生器的自适应均衡器。 抽头系数发生器包括均衡器抽头更新单元，矢量范数平方估计器，有源抽头掩码发生器，用于最小化均衡器滤波器的动态范围的开关和导频振幅参考单元。 当由开关选择由均衡器滤波器输出的未屏蔽信号以产生馈送到均衡器抽头更新单元的误差信号时，动态屏蔽矢量用于屏蔽均衡器抽头更新单元产生的有效抽头。 当使用由均衡器滤波器输出的屏蔽信号来产生误差信号时，固定屏蔽矢量用于屏蔽均衡器抽头更新单元产生的有源抽头。

公开(公告)号：WO2006052407A2

公开(公告)日：2006-05-18

申请号：PCT/US2005/037656

申请日：2005-10-18

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  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: H04B1/707 ,  H04B1/10

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。

公开(公告)号：WO2006052398A2

公开(公告)日：2006-05-18

申请号：PCT/US2005/037416

申请日：2005-10-19

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PIETRASKI, Philip, J. ,  YANG, Rui ,  BELURI, Mihaela ,  DEMIR, Alpaslan

Inventor： PIETRASKI, Philip, J. ,  YANG, Rui ,  BELURI, Mihaela ,  DEMIR, Alpaslan

IPC: H03H7/40

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生成耙式接收器手指权重。 基于手指权重中的至少一个产生估计的频率误差信号。

公开(公告)号：WO2006052404A2

公开(公告)日：2006-05-18

申请号：PCT/US2005/037602

申请日：2005-10-20

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PIETRASKI, Philip, J. ,  BELURI, Mihaela ,  DEMIR, Alpaslan

Inventor： PIETRASKI, Philip, J. ,  BELURI, Mihaela ,  DEMIR, Alpaslan

IPC: H03D1/04 ,  H03K5/159

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, α , 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。

公开(公告)号：EP1815601A2

公开(公告)日：2007-08-08

申请号：EP05813289.5

申请日：2005-10-19

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

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.

公开(公告)号：EP1864392A2

公开(公告)日：2007-12-12

申请号：EP06737054.4

申请日：2006-03-06

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： PIETRASKI, Philip, J. ,  KEARNEY, Kenneth, P. ,  YANG, Rui ,  CHINCHOLI, AMith, Vikram ,  BELURI, Mihaela

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.

公开(公告)号：EP1810402A2

公开(公告)日：2007-07-25

申请号：EP05814908.9

申请日：2005-10-20

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

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

Abstract translation: 步长估计器用于控制并入收发器（例如，无线发射/接收单元（WTRU））中的自适应均衡器的步长。 步长估计器基于在收发器和另一收发器之间建立的信道的表观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率）。 SNR平均器生成公共导频信道（CPICH）SNR估计。 步长映射单元使用速度估计和CPICH SNR估计来生成步长参数μ和滤波器抽头泄漏因子参数α，自适应均衡器使用该参数来更新滤波器抽头系数。