公开(公告)号：WO2006052596A3

公开(公告)日：2006-12-14

申请号：PCT/US2005039635

申请日：2005-11-02

Applicant: INTERDIGITAL TECH CORP ,  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 ,  G06F17/10 ,  H03K5/159 ,  H04B1/10 ,  H04B3/14

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: 公开了一种自适应均衡器，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。 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，开关和导频幅度参考单元，用于最小化均衡器滤波器的动态范围。 当由均衡器滤波器输出的未掩蔽信号被开关选择以产生馈送到均衡器抽头更新单元的误差信号时，使用动态掩码向量来掩蔽由均衡器抽头更新单元产生的有源抽头。 当由均衡器滤波器输出的掩蔽信号被用于生成误差信号时，使用固定掩蔽矢量来掩蔽由均衡器抽头更新单元生成的有效抽头。

公开(公告)号：WO2005034404A3

公开(公告)日：2006-03-16

申请号：PCT/US2004028402

申请日：2004-09-01

Applicant: INTERDIGITAL TECH CORP ,  LI BIN ,  REZNIK ALEXANDER

Inventor： LI BIN ,  REZNIK ALEXANDER

IPC: H04B15/00 ,  H04B1/707 ,  H04B7/08 ,  H04K1/00 ,  H04L27/30

CPC classification number: H04B1/712 ,  H04B7/0854

Abstract: A receiver (fig.2) comprises a plurality of antenna elements (210) for receiving a data signal. Each antenna element (210) has a plurality of Rake fingers (200). Each Rake finger (200) processes a received multipath component of the received data signal of its antenna element (210) by applying a complex weight gain to that received multipath component. A complex weight gain generator (205) determines the complex weight gain for each Rake finger (200) for each antenna element (210) using an input from all the Rake fingers (200). A summer (225) combines an output of each Rake finger (200) to produce an estimate of the data signal.

Abstract translation: 接收机（图2）包括用于接收数据信号的多个天线元件（210）。 每个天线元件（210）具有多个耙指（200）。 每个耙指（200）通过对所接收的多路径分量应用复加权增益来处理其天线元件（210）的接收数据信号的接收多径分量。 复合加权增益发生器（205）使用来自所有耙指（200）的输入来确定每个天线元件（210）的每个耙指（200）的复加权增益。 夏季（225）组合每个耙指（200）的输出以产生数据信号的估计。

公开(公告)号：WO2005009057A3

公开(公告)日：2005-07-21

申请号：PCT/US2004022547

申请日：2004-07-13

Applicant: INTERDIGITAL TECH CORP ,  REZNIK ALEXANDER ,  LI BIN ,  YANG RUI ,  ZEIRA ARIELA

Inventor： REZNIK ALEXANDER ,  LI BIN ,  YANG RUI ,  ZEIRA ARIELA

IPC: H04B1/7115 ,  H04B1/00 ,  H04L25/03 ,  H04Q20060101

CPC classification number: H04B1/7113 ,  H04B1/7115 ,  H04L25/03038 ,  H04L25/03987 ,  H04L2025/03592

Abstract: 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.

Abstract translation: 一种通过处理由两个多路径簇组成的脉冲信道响应来抑制簇间多路径干扰的接收机，每个簇具有多个延迟的信号组。 在一个实施例中，接收器包括单个天线和并联连接的延迟单元，用于在输入到相应滑动窗口均衡器之前对齐这些信号组。 均衡器的输出通过提供单输出的组合器在芯片级组合。 在另一个实施例中，集群多路径干扰抑制（CMIS）电路被结合到接收机中。 CMIS电路包括硬判决单元和多个信号再生单元以生成多路径群集的复制品。 从延迟单元的各个输出中减去副本，并将结果输入到各个滑动窗口均衡器。 在另一个实施例中，使用多个天线来接收和处理群集。

公开(公告)号：WO2004049112A3

公开(公告)日：2004-12-23

申请号：PCT/US0336760

申请日：2003-11-17

Applicant: INTERDIGITAL TECH CORP

Inventor： LI BIN ,  REZNIK ALEXANDER

IPC: H04B1/707 ,  H04L25/02 ,  H04J13/04

CPC classification number: H04L25/0232 ,  H04B1/712 ,  H04B2201/70701

Abstract: A channel estimation method which reduces the strain on resources of a RAKE receiver using a complex weight gain (CWG) algorithm. In one embodiment, a non-adaptive algorithm is used to average blocks of pilot symbols from several slots (320). In another embodiment, an adaptive algorithm implements sliding window averaging or a recursive filter. Using a CWG algorithm (325) reduces the memory and processor requirements of the RAKE receiver.

Abstract translation: 一种使用复加权增益（CWG）算法减少RAKE接收机的资源的应变的信道估计方法。 在一个实施例中，使用非自适应算法来从多个时隙（320）平均导频符号块。 在另一个实施例中，自适应算法实现滑动窗口平均或递归滤波器。 使用CWG算法（325）减少了RAKE接收机的内存和处理器要求。

公开(公告)号：WO03093929A2

公开(公告)日：2003-11-13

申请号：PCT/US0313248

申请日：2003-04-29

Applicant: INTERDIGITAL TECH CORP

Inventor： LI BIN

IPC: H04B1/707 ,  G06F

CPC classification number: H04B1/7085 ,  H04B1/7115 ,  H04B1/7117 ,  H04B2001/70706

Abstract: A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of a pseudonoise sequence, an error signal output generated by the despreading, and adjustment for a plurality of on-time, early and late samples, a data rate of a control signal provided as a fractional proportion of a data rate of error signals.

Abstract translation: 一种简单而鲁棒的CTL用于通过无线多径衰落信道发送的扩频信号的多径分量的时间跟踪。 数字代码跟踪循环包括通过使用伪噪声序列来解扩早期和晚期数据样本的实现，由解扩生成的误差信号输出以及多个准时，早期和晚期样本的调整，数据速率 作为误差信号的数据速率的分数比例提供的控制信号。

公开(公告)号：WO2004079927A3

公开(公告)日：2005-03-24

申请号：PCT/US2004006162

申请日：2004-03-02

Applicant: INTERDIGITAL TECH CORP ,  YANG RUI ,  LI BIN ,  REZNIK ALEXANDER ,  ZEIRA ARIELA

Inventor： YANG RUI ,  LI BIN ,  REZNIK ALEXANDER ,  ZEIRA ARIELA

IPC: H04B1/38 ,  H04L25/02 ,  H04L25/03 ,  H04B1/69

CPC classification number: H04L25/03057 ,  H04L25/0212 ,  H04L25/0242 ,  H04L25/03292 ,  H04L2025/03605

Abstract: A sliding window based data estimation is performed. An error is introduced in the data estimation to the communication modeling the relationship between the transmitted and received signals. To compensate for an error in the estimated data, the data that was estimated in a previous sliding window step (58) or terms that would otherwise be truncated as noise are used. These techniques (50, 52, 54, 56. 58, 60, 62 and 64) allow for data to be truncated prior to further processing reducing the data of the window.

Abstract translation: 执行基于滑动窗口的数据估计。 在数据估计中引入了错误，以通信建模发送和接收信号之间的关系。 为了补偿估计数据中的错误，使用在先前滑动窗口步骤（58）中估计的数据或否则将被截断为噪声的项目。 这些技术（50,52,54,58,56,62和64）允许在进一步处理之前对数据进行截断以减少窗口的数据。

公开(公告)号：WO2006088685A3

公开(公告)日：2008-11-13

申请号：PCT/US2006004153

申请日：2006-02-07

Applicant: INTERDIGITAL TECH CORP ,  LI BIN ,  DIFAZIO ROBERT A ,  PAN KYLE JUNG-LIN ,  REZNIK ALEXANDER ,  KAEWELL JOHN DAVID JR ,  BECKER PETER EDWARD

Inventor： LI BIN ,  DIFAZIO ROBERT A ,  PAN KYLE JUNG-LIN ,  REZNIK ALEXANDER ,  KAEWELL JOHN DAVID JR ,  BECKER PETER EDWARD

IPC: H03H7/30 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC classification number: H04L25/03159 ,  H04B17/336

Abstract: A receiver or an integrated circuit (IC) incorporated therein includes a fast Fourier transform (FFT)-based (or hybrid FFT-based) sliding window block level equalizer (BLE) for generating equalized samples. The BLE includes a noise power estimator, first and second channel estimators, an FFT-based chip level equalizer (CLEQ) and a channel monitor unit. The noise power estimator generates a noise power estimate based on two diverse sample data streams. The channel estimators generate respective channel estimates based on the sample data streams. The channel monitor unit generates a first channel monitor signal including truncated channel estimate vectors based on the channel estimates, and a second channel monitor signal which indicates an approximate rate of change of the truncated channel estimate vectors. The FFT-based CLEQ generates the equalized samples based on the noise power estimate, one-block samples of the first and second sample data streams, the channel estimates and the monitor signals.

Abstract translation: 结合在其中的接收器或集成电路（IC）包括用于产生均衡样本的基于快速傅立叶变换（FFT）（或基于混合FFT）的滑动窗口块级均衡器（BLE）。 BLE包括噪声功率估计器，第一和第二信道估计器，基于FFT的码片级均衡器（CLEQ）和信道监视器单元。 噪声功率估计器基于两个不同的采样数据流产生噪声功率估计。 信道估计器基于样本数据流生成相应的信道估计。 信道监视单元基于信道估计产生包括截断的信道估计向量的第一信道监视信号，以及指示截断的信道估计向量的近似变化率的第二信道监视信号。 基于FFT的CLEQ基于噪声功率估计，第一和第二采样数据流的一个块采样，信道估计和监视信号来生成均衡的采样。

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。

公开(公告)号：WO2005029742A3

公开(公告)日：2007-01-11

申请号：PCT/US2004027394

申请日：2004-08-24

Applicant: INTERDIGITAL TECH CORP ,  LI BIN ,  STERNBERG GREGORY S ,  PIETRASKI PHILIP J

Inventor： LI BIN ,  STERNBERG GREGORY S ,  PIETRASKI PHILIP J

IPC: H03C3/38 ,  H03C1/00 ,  H03D1/00 ,  H03D1/24 ,  H04J11/00 ,  H04L1/20 ,  H04L5/12 ,  H04L27/00 ,  H04L27/20 ,  H04L27/22 ,  H04L27/36 ,  H04L27/38

CPC classification number: H04L27/38 ,  H04L1/20

Abstract: 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 (101). 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 (105), 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 (111) by the sum of transmitted magnitude values to generate an estimate of the amplitude of the M-QAM signal.

Abstract translation: 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来估计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（101）。 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。 产品集合（105），然后确定产品总数的实部。 已知发射符号的绝对值被相加以产生总幅值。 产品总和的实部由（111）除以传输的幅值之和，以产生M-QAM信号幅度的估计。

公开(公告)号：WO2006121721A2

公开(公告)日：2006-11-16

申请号：PCT/US2006016935

申请日：2006-05-02

Applicant: INTERDIGITAL TECH CORP ,  LI BIN ,  YANG RUI ,  STERNBERG GREGORY S

Inventor： LI BIN ,  YANG RUI ,  STERNBERG GREGORY S

IPC: H04L27/06

CPC classification number: H04L1/20 ,  H04B2201/70701

Abstract: 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.

Abstract translation: 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。