公开(公告)号：WO2009108666A2

公开(公告)日：2009-09-03

申请号：PCT/US2009035083

申请日：2009-02-25

Applicant: INTERDIGITAL TECH CORP ,  VANGANURU KIRAN KUMAR S ,  LAWTON WILLIAM E ,  STERNBERG GREGORY S

Inventor： VANGANURU KIRAN KUMAR S ,  LAWTON WILLIAM E ,  STERNBERG GREGORY S

IPC: H04B7/005

CPC classification number: H04W52/12 ,  H04W52/143 ,  H04W52/16 ,  H04W52/225 ,  H04W52/241 ,  H04W52/286 ,  H04W52/325

Abstract: A method and apparatus for performing closed loop transmit power control of a fractional dedicated physical channel (F-DPCH) are disclosed. Transmit power control (TPC) symbols on an F-DPCH and common pilot channel (CPICH) symbols are received. A short term signal power estimate is calculated using the TPC symbols, and a short term noise power estimate is calculated using the CPICH symbols. A short term signal-to-interference ratio (SIR) on the F-DPCH is calculated. A long term signal power estimate and a long term noise power estimate are calculated using the TPC symbols. A long term SIR is calculated and compared to a TPC quality target. An SIR target is adjusted based on comparison of the long term SIR to the TPC quality target. The short term SIR is compared to the SIR target and a TPC command is generated based on comparison of the short term SIR to the SIR target.

Abstract translation: 公开了一种用于执行分数专用物理信道（F-DPCH）的闭环发送功率控制的方法和设备。 接收F-DPCH和公共导频信道（CPICH）符号上的发射功率控制（TPC）符号。 使用TPC码元来计算短期信号功率估计，并且使用CPICH码元来计算短期噪声功率估计。 计算F-DPCH上的短期信号干扰比（SIR）。 使用TPC符号来计算长期信号功率估计和长期噪声功率估计。 计算长期SIR并与TPC质量目标进行比较。 基于长期SIR与TPC质量目标的比较来调整SIR目标。 将短期SIR与SIR目标进行比较，并且基于将SIR目标与短期SIR进行比较来生成TPC命令。

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。

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：EP1573923A4

公开(公告)日：2008-10-08

申请号：EP03796549

申请日：2003-12-03

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S

IPC: H03M13/00 ,  H03M13/29 ,  H03M13/35 ,  H03M13/27

CPC classification number: H03M13/2771 ,  H03M13/005 ,  H03M13/2792 ,  H03M13/2957 ,  H03M13/6362 ,  H03M13/6381 ,  H04L1/0067

Abstract: Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder (600) with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching (610, 620) are employed.

Abstract translation: 当实现收缩Turbo码时，检测，避免和/或校正奇偶比特流中的有问题的删余模式，而不必避免期望的码率。 这使得能够识别/避免Turbo代码性能相对较差的区域。 包括Turbo编码和打孔的前向纠错实现了任何性能测量和由Turbo编码器（600）生成的较低码率码与奇偶校验位的打孔组合所得到的有效码率之间的平滑函数关系。 在一个实施例中，当采用两级或更多级速率匹配（610,620）时，通过对相互作用进行收缩来实现纠正/避免由Turbo编码引起的退化的方法。

公开(公告)号：EP1807932A4

公开(公告)日：2009-09-02

申请号：EP05816112

申请日：2005-11-02

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN ,  PAN JUNG-LIN ,  STERNBERG GREGORY S ,  YANG RUI ,  LI BIN

IPC: H04L25/03

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.

公开(公告)号：EP1568141A4

公开(公告)日：2008-08-27

申请号：EP03781981

申请日：2003-11-17

Applicant: INTERDIGITAL TECH CORP

Inventor： STERNBERG GREGORY S ,  YANG RUI ,  PIETRASKI PHILIP J ,  OLESEN ROBERT LIND

IPC: H03M13/45 ,  H03M13/35 ,  H04L1/00 ,  H04L1/18 ,  H04L1/20 ,  H04L25/06

CPC classification number: H04L25/067 ,  H03M13/35 ,  H04L1/0045 ,  H04L1/0071 ,  H04L1/1812 ,  H04L1/20 ,  H04L25/0222

Abstract: A system, components and methods provide FEC decoding in a wireless communication system in which signal to noise ratio estimation is used for scaling (18) information captured by a demodulator (14) in processing received wireless communication signals (12). A preferred wireless transmit unit (WRTU) has a channel rate estimation device (23) configured to process the received communication signals for the particular communication channel and to produce channel change rate estimates. A signal to noise ratio (SNR) estimation device (16) of the WRTU is configured to produce SNR estimates based on observation windows of a calculated number of samples of the received signal where the number of samples used for each observation window is calculated (25) as a function of the channel change rate estimates produced by the channel rate estimation device (23).

公开(公告)号：EP1719263A4

公开(公告)日：2013-01-23

申请号：EP05722616

申请日：2005-02-02

Applicant: INTERDIGITAL TECH CORP

Inventor： STERNBERG GREGORY S ,  TSAI YINGMING ,  PIETRASKI PHILIP J

IPC: H03M13/41 ,  H04B7/00 ,  H04B17/40 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04L1/20 ,  H03M13/3738 ,  H03M13/41 ,  H03M13/653 ,  H04L1/0054 ,  H04L1/0072

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：EP1636910A4

公开(公告)日：2006-08-02

申请号：EP04754999

申请日：2004-06-10

Applicant: INTERDIGITAL TECH CORP

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

IPC: H04B1/00 ,  H04B1/10 ,  H04B1/18 ,  H04L1/00 ,  H04L1/20

CPC classification number: H04L1/20 ,  H04B1/1027 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/1607

Abstract: A method for biasing signal-to-interference ratio (SIR) to generate channel quality indicator (CQI) includes measuring the packet error rate (PER) of a received signal and comparing the PER to a to the target PER to generate a correction term. The correction term is combined with the SIR estimation of a reference channel to generate a CQI. The CQI is reported to a transmitter to adjust signal configurations, such as code rate, modulation type, number of codes, power offset.

Abstract translation: 用于偏置信号干扰比（SIR）以生成信道质量指示符（CQI）的方法包括测量接收到的信号的分组差错率（PER）并将PER与a与目标PER进行比较以生成校正项。 校正项与参考信道的SIR估计组合以生成CQI。 CQI被报告给发射机以调整信号配置，例如码率，调制类型，码数，功率偏移。