公开(公告)号：US20070183335A1

公开(公告)日：2007-08-09

申请号：US11732904

申请日：2007-04-04

申请人： Philip Pietraski ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip Pietraski ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H04L12/26

CPC分类号： H04L1/0026 ,  H04L1/20 ,  H04L25/0202

摘要： A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.

公开(公告)号：US20060251152A1

公开(公告)日：2006-11-09

申请号：US11153967

申请日：2005-06-16

申请人： Bin Li ,  Rui Yang ,  Gregory Sternberg

发明人： Bin Li ,  Rui Yang ,  Gregory Sternberg

IPC分类号： H04L27/06

CPC分类号： H04L1/20 ,  H04B2201/70701

摘要： The present invention is related to a method and apparatus for estimating signal-to-noise ratio (SNR) based on dedicated physical channel (DPCH) pilot symbols in a wireless communication system. A receiver receives a DPCH transmission and a despreader despreads the received DPCH transmission. A selector selects pilot symbols in the despread DPCH transmission. A signal power estimator estimates signal power based on the pilot symbols, and a noise power estimator estimates noise power based on the received DPCH transmission. A SNR estimator estimates an SNR based on the signal power estimation and the noise power estimation. The noise power estimator may calculate the noise power estimation either based only on pilot symbols or based on both pilot symbols and non-pilot symbols. The DPCH transmission may be transmitted using more than one antenna for transmit diversity.

摘要翻译： 本发明涉及一种用于在无线通信系统中基于专用物理信道（DPCH）导频符号来估计信噪比（SNR）的方法和装置。 接收机接收DPCH传输，并且去扩展器对所接收的DPCH传输进行解扩。 选择器在解扩DPCH传输中选择导频符号。 信号功率估计器基于导频符号估计信号功率，并且噪声功率估计器基于所接收的DPCH传输来估计噪声功率。 SNR估计器基于信号功率估计和噪声功率估计来估计SNR。 噪声功率估计器可以仅基于导频符号或基于导频符号和非导频符号来计算噪声功率估计。 可以使用多于一个的天线发射DPCH传输用于发射分集。

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：US20050094596A1

公开(公告)日：2005-05-05

申请号：US10940079

申请日：2004-09-14

申请人： Philip Pietraski ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

发明人： Philip Pietraski ,  Gregory Sternberg ,  Rui Yang ,  Bin Li

IPC分类号： H04L1/00 ,  H04L1/20 ,  H04L25/02 ,  H04L5/12

CPC分类号： H04L1/0026 ,  H04L1/20 ,  H04L25/0202

摘要： A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.

摘要翻译： 一种用于估计和报告无线发射/接收单元（WTRU）和节点B之间的无线通信信道的质量的方法和装置。 通过通信信道从节点B接收调制信号，并对调制信号执行信道估计以提供信道估计。 在一个实施例中，基于信道估计来解调调制信号以提供解调信号，并且获得基于解调信号的信号干扰（SIR）估计。 至少基于SIR估计来估计通信信道的质量。 在替代实施例中，获得基于信道估计的SIR估计。 基于SIR估计和包括延迟扩展，发射功率和WTRU速度信息中的至少一个的附加信息来估计通信信道的质量。

公开(公告)号：US20050053167A1

公开(公告)日：2005-03-10

申请号：US10750203

申请日：2003-12-31

申请人： Bin Li ,  Gregory Sternberg ,  Philip Pietraski

发明人： Bin Li ,  Gregory Sternberg ,  Philip Pietraski

IPC分类号： H04L1/20 ,  H04L27/38 ,  H04L5/12

CPC分类号： H04L27/38 ,  H04L1/20

摘要： An improved system and method for estimating one or more parameters, such as amplitude and signal-to-noise ratio, of a received signal, such as an M-QAM or q-ASK signal, is set forth herein. A first embodiment of the invention estimates the amplitude of an M-QAM signal based upon known or ascertainable phase information regarding a plurality of transmitted symbols. A respective set of received symbols corresponding to the plurality of transmitted symbols is recovered. Each of the plurality of received symbols is multiplied by a complex unit vector with a phase that is opposite in sign to the complex transmitted data symbol to generate a set of products. The set of products is summed, and the real part of the sum of products is then determined. The absolute values of the known transmitted symbols are summed to generate a total magnitude value. The real part of the sum of products is divided by the sum of transmitted magnitude values to generate an estimate of the amplitude of the M-QAM signal. Other embodiments of the present invention utilize second-order and fourth-order moments of received samples, a maximum likelihood searching process, or a Kurtosis estimation process to estimate amplitude, noise power, and signal-to-noise ratio of a received signal.

摘要翻译： 本文阐述了用于估计接收信号（诸如M-QAM或q-ASK信号）的一个或多个参数（诸如振幅和信噪比）的改进的系统和方法。 本发明的第一实施例基于关于多个发送符号的已知或可确定的相位信息估计M-QAM信号的幅度。 恢复对应于多个发送符号的相应的一组接收符号。 将多个接收到的符号中的每一个乘以具有与符号相反的相位的复数单位向量到复数发送的数据符号，以生成一组乘积。 产品组合相加，然后确定产品总额的实际部分。 已知发射符号的绝对值被相加以产生总幅值。 将产品总和的实部除以发送的幅度值的和以产生M-QAM信号的幅度的估计。 本发明的其它实施例利用接收样本的二阶和四阶矩，最大似然搜索处理或者一种用于估计接收信号的幅度，噪声功率和信噪比的一个峰值估计过程。

公开(公告)号：US08265130B2

公开(公告)日：2012-09-11

申请号：US12512203

申请日：2009-07-30

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

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

IPC分类号： H03H7/40 ,  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：US20100067620A1

公开(公告)日：2010-03-18

申请号：US12565284

申请日：2009-09-23

申请人： Alexander Reznik ,  Rui Yang ,  Bin Li ,  Ariela Zeira

发明人： Alexander Reznik ,  Rui Yang ,  Bin Li ,  Ariela Zeira

IPC分类号： H04L27/06

CPC分类号： H04L25/0242 ,  H04B1/71052 ,  H04L25/0212 ,  H04L25/03057 ,  H04L25/03292 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03605

摘要： A method and apparatus for use in data estimation in wireless communication are provided. A wireless communications signal is received and transformed to produce a received vector. The received vector is processed using a sliding window based approach that includes processing each of a plurality of windows. For each window, an approximate circulant channel response matrix is produced for use in estimating a data vector corresponding to the window.

摘要翻译： 提供了一种用于无线通信中的数据估计的方法和装置。 无线通信信号被接收和变换以产生接收的矢量。 使用基于滑动窗口的方法处理接收的向量，其包括处理多个窗口中的每一个。 对于每个窗口，产生近似循环通道响应矩阵用于估计对应于该窗口的数据矢量。

公开(公告)号：US20060109892A1

公开(公告)日：2006-05-25

申请号：US11327738

申请日：2006-01-06

申请人： Bin Li ,  Rui Yang ,  Alexander Reznik ,  Ariela Zeira

发明人： Bin Li ,  Rui Yang ,  Alexander Reznik ,  Ariela Zeira

IPC分类号： H04B1/707 ,  H04L1/02

CPC分类号： H04B1/7113 ,  H04B1/7115 ,  H04L25/03038 ,  H04L25/03987 ,  H04L2025/03592

摘要： A receiver which suppresses inter-cluster multipath interference by processing an impulse channel response consisting of two multipath clusters, each cluster having groups of signals with multiple delays. In one embodiment, the receiver includes a single antenna and parallel-connected delay units used to align the groups of signals before being input into respective sliding window equalizers. The outputs of the equalizers are combined at chip level via a combiner which provides a single output. In another embodiment, a cluster multipath interference suppression (CMIS) circuit is incorporated into the receiver. The CMIS circuit includes a hard decision unit and a plurality of signal regeneration units to generate replicas of the multipath clusters. The replicas are subtracted from the respective outputs of the delay units and the results are input to the respective sliding window equalizers. In another embodiment, multiple antennas are used to receive and process the clusters.

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：US20080298523A1

公开(公告)日：2008-12-04

申请号：US12191702

申请日：2008-08-14

申请人： Alexander Reznik ,  Rui Yang ,  Bin Li ,  Ariela Zeira

发明人： Alexander Reznik ,  Rui Yang ,  Bin Li ,  Ariela Zeira

IPC分类号： H03D1/04

CPC分类号： H04L25/0242 ,  H04B1/71052 ,  H04L25/0212 ,  H04L25/03057 ,  H04L25/03292 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03605

摘要： Data estimation is performed in a wireless communication system using both oversampling and multiple reception antennas. A receive vector is produced for each antenna at a sampling interval which is a multiple of the chip rate of the received signal. A channel response matrix is produced for each antenna at a preferred multiple of the sampling rate. Each receive vector is processed using a sliding window based approach, where a plurality of successive windows are processed. For each window, a combined circulant channel response matrix is produced using the channel response matrices. Using the combined circulant channel response matrix and a combined received vector comprising each received vector in a discrete Fourier transform based approach to estimate a data vector corresponding to that window; and combining the data vector estimated in each window to form a combined data vector.

摘要翻译： 在使用过采样和多个接收天线的无线通信系统中执行数据估计。 以每个天线的采样间隔产生接收矢量，该采样间隔是接收信号的码片速率的倍数。 以采样率的优选倍数为每个天线产生信道响应矩阵。 使用基于滑动窗口的方法处理每个接收向量，其中处理多个连续的窗口。 对于每个窗口，使用信道响应矩阵来产生组合循环信道响应矩阵。 使用组合的循环信道响应矩阵和包括基于离散傅立叶变换的方法中的每个接收向量的组合接收向量来估计对应于该窗口的数据矢量; 并组合在每个窗口中估计的数据矢量以形成组合的数据向量。