公开(公告)号：US20060171451A1

公开(公告)日：2006-08-03

申请号：US11265373

申请日：2005-11-02

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

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

IPC分类号： 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.

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：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：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：US20060098716A1

公开(公告)日：2006-05-11

申请号：US11209097

申请日：2005-08-22

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

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

IPC分类号： H03H7/40

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：US20060114974A1

公开(公告)日：2006-06-01

申请号：US11210949

申请日：2005-08-24

申请人： Ariela Zeira ,  Philip Pietraski ,  Jung-Lin Pan ,  Mihaela Beluri ,  Rui Yang

发明人： Ariela Zeira ,  Philip Pietraski ,  Jung-Lin Pan ,  Mihaela Beluri ,  Rui Yang

IPC分类号： H04B1/707 ,  H04B1/10

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

摘要： 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.

摘要翻译： 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：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：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：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：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。