公开(公告)号：US20090060020A1

公开(公告)日：2009-03-05

申请号：US12265929

申请日：2008-11-06

申请人： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

发明人： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

IPC分类号： H04L27/01

CPC分类号： H04B1/7097 ,  H04B1/712 ,  H04L25/03248

摘要： 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.

摘要翻译： 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生成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。

公开(公告)号：US20090316768A1

公开(公告)日：2009-12-24

申请号：US12490614

申请日：2009-06-24

申请人： Philip J. Pietraski ,  Mihaela Beluri

发明人： Philip J. Pietraski ,  Mihaela Beluri

IPC分类号： H03K5/159

CPC分类号： H04L25/03038 ,  H04B1/7097 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07570690B2

公开(公告)日：2009-08-04

申请号：US11265373

申请日：2005-11-02

申请人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H03K5/08 ,  H04B1/10 ,  H03K5/159

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

摘要： 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.

摘要翻译： 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：US20070076791A1

公开(公告)日：2007-04-05

申请号：US11427217

申请日：2006-06-28

申请人： Robert DiFazio ,  Jung-Lin Pan ,  Bin Li ,  Mihaela Beluri

发明人： Robert DiFazio ,  Jung-Lin Pan ,  Bin Li ,  Mihaela Beluri

IPC分类号： H03H7/30 ,  H04B1/00

CPC分类号： H04L25/03012 ,  H04L25/0206 ,  H04L2025/03605

摘要： 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.

摘要翻译： 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，信道监视器单元，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。 信道监视器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。

公开(公告)号：US20060098766A1

公开(公告)日：2006-05-11

申请号：US11238469

申请日：2005-09-29

申请人： Philip Pietraski ,  Mihaela Beluri ,  Alpaslan Demir

发明人： Philip Pietraski ,  Mihaela Beluri ,  Alpaslan Demir

IPC分类号： H03D1/04 ,  H03K5/159

CPC分类号： H04L25/03019 ,  H04B2201/70701 ,  H04L2025/03687

摘要： 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.

公开(公告)号：US20120314755A1

公开(公告)日：2012-12-13

申请号：US13589688

申请日：2012-08-20

申请人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H04L27/01

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

摘要： 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.

摘要翻译： 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：US07912120B2

公开(公告)日：2011-03-22

申请号：US12688242

申请日：2010-01-15

申请人： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

发明人： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

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

CPC分类号： H04B1/7097 ,  H04B1/712 ,  H04L25/03248

摘要： A method and apparatus for estimating and correcting baseband frequency error in a receiver are disclosed. 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. Alternatively, 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.

摘要翻译： 公开了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。 均衡器对样本数据流执行均衡，并基于均衡生成滤波器抽头值。 基于滤波器抽头值中的至少一个生成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。 或者，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。

公开(公告)号：US20090290630A1

公开(公告)日：2009-11-26

申请号：US12512203

申请日：2009-07-30

申请人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip J. Pietraski ,  Mihaela Beluri ,  Alpaslan Demir ,  Jung-Lin Pan ,  Gregory S. Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H03K5/159 ,  H03K5/08 ,  H03H7/30

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

摘要： 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.

摘要翻译： 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：US20090180528A1

公开(公告)日：2009-07-16

申请号：US12415023

申请日：2009-03-31

申请人： Jung-Lin Pan ,  Mihaela Beluri ,  Philip J. Pietraski

发明人： Jung-Lin Pan ,  Mihaela Beluri ,  Philip J. Pietraski

IPC分类号： H04L27/01

CPC分类号： H04L25/03038 ,  H04B1/712 ,  H04B2201/70701 ,  H04L25/03044 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

摘要： 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.

摘要翻译： 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，单个校正项生成器用于基于导频信号产生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产生每个均衡器滤波器的校正项，由此校正项发生器之一使用在均衡器滤波器之一的输出处从硬判决单元接收的数据来产生校正项 两个均衡器滤波器。

公开(公告)号：US07457347B2

公开(公告)日：2008-11-25

申请号：US11209097

申请日：2005-08-22

申请人： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

发明人： Philip J. Pietraski ,  Rui Yang ,  Mihaela Beluri ,  Alpaslan Demir

IPC分类号： H04B1/00

CPC分类号： H04B1/7097 ,  H04B1/712 ,  H04L25/03248

摘要： 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.

摘要翻译： 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生成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。