公开(公告)号：WO2005048031A3

公开(公告)日：2005-12-22

申请号：PCT/US2004034789

申请日：2004-10-21

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

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

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

CPC classification number: H04L1/0026 ,  H04L1/20 ,  H04L25/0202

Abstract: 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.

Abstract translation: 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：WO2005004338A2

公开(公告)日：2005-01-13

申请号：PCT/US2004020427

申请日：2004-06-24

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

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

IPC: H03D1/04 ,  H04B20060101 ,  H04B1/707 ,  H04L25/03 ,  H04B

CPC classification number: H04L25/03305 ,  H04B1/71055 ,  H04L25/03331 ,  H04L25/03993

Abstract: The present invention has many aspects. One aspect of the invention is to perform equalization using a sliding window approach. A second aspect reuses information derived for each window for use by a subsequent window. A third aspect utilizes a discrete Fourier transform based approach for the equalization. A fourth aspect relates to handling oversampling of the received signals and channel responses. A fifth aspect relates to handling multiple reception antennas. A sixth embodiment relates to handling both oversampling and multiple reception antennas.

Abstract translation: 本发明具有许多方面。 本发明的一个方面是使用滑动窗口方法进行均衡。 第二个方面重用为每个窗口导出的信息，供后续窗口使用。 第三方面利用基于离散傅立叶变换的均衡方法。 第四方面涉及处理接收信号和信道响应的过采样。 第五方面涉及处理多个接收天线。 第六实施例涉及处理过采样和多个接收天线。

公开(公告)号：EP1687928A4

公开(公告)日：2006-11-15

申请号：EP04795890

申请日：2004-10-21

Applicant: INTERDIGITAL TECH CORP

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

IPC: H04L1/00 ,  H04L1/20 ,  H04L25/02

CPC classification number: H04L1/0026 ,  H04L1/20 ,  H04L25/0202

Abstract: 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.

Abstract translation: 一种用于估计和报告无线发射/接收单元（WTRU）与节点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，并且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，基于信道估计对调制信号进行解调以提供解调信号，并且获得基于解调信号的信号与干扰（SIR）估计。 通信信道的质量至少基于SIR估计来估计。 在替代实施例中，获得基于信道估计的SIR估计。 通信信道的质量基于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。

公开(公告)号：EP1563627A4

公开(公告)日：2009-11-04

申请号：EP03781975

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

公开(公告)号：EP1676382A4

公开(公告)日：2009-04-08

申请号：EP04782818

申请日：2004-09-01

Applicant: INTERDIGITAL TECH CORP

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.

公开(公告)号：EP1500208A4

公开(公告)日：2009-03-25

申请号：EP03736507

申请日：2003-04-29

Applicant: INTERDIGITAL TECH CORP

Inventor： LI BIN

IPC: H04B1/707 ,  H04B1/69

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

Abstract: A simple and robust CTL (21) 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.

公开(公告)号：EP1649604A4

公开(公告)日：2007-01-17

申请号：EP04778184

申请日：2004-07-13

Applicant: INTERDIGITAL TECH CORP

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

IPC: H04B1/00 ,  H04B1/7115 ,  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.

公开(公告)号：EP1849251A4

公开(公告)日：2013-04-24

申请号：EP06720375

申请日：2006-02-07

Applicant: INTERDIGITAL TECH CORP

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

IPC: H04L25/03 ,  H04B17/00

CPC classification number: H04L25/03159 ,  H04B17/336

公开(公告)号：EP1671441A4

公开(公告)日：2008-06-11

申请号：EP04786564

申请日：2004-08-24

Applicant: INTERDIGITAL TECH CORP

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. 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.

公开(公告)号：EP1604466A4

公开(公告)日：2007-06-27

申请号：EP04716409

申请日：2004-03-02

Applicant: INTERDIGITAL TECH CORP

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

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

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.