公开(公告)号：WO2006101997A3

公开(公告)日：2008-01-24

申请号：PCT/US2006009556

申请日：2006-03-16

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J

Inventor： PIETRASKI PHILIP J

IPC: H04B1/10 ,  H03H7/30

CPC classification number: H03H21/0043 ,  H03H2021/0056 ,  H04L25/0226 ,  H04L25/03019 ,  H04L2025/03496 ,  H04L2025/03611

Abstract: The present invention is related to an enhanced equalizer (106) using channel estimation. A scaled version of a channel estimate is used as an expected average behavior of the product of a transmitted signal and a received signal to implement Griffith algorithm. The present invention also uses advance or prediction of a channel estimate (112) to overcome the lag problem inherent in a least means square (LMS) algorithm in a time varying channel. Therefore, the present invention enables the use of a small step size while attaining the same tracking capability with a large step size. A channel estimate at some time in the future is used for updating equalizer filter tap coefficients. This may be performed with a prediction filter. Alternatively, a delay (104) may be introduced in the input data to the filter tap coefficient generator (114), which makes a channel estimate look like a prediction to the filter tap coefficient generator.

Abstract translation: 本发明涉及使用信道估计的增强均衡器（106）。 信道估计的缩放版本被用作发射信号和接收信号的乘积的预期平均行为以实现Griffith算法。 本发明还使用信道估计（112）的提前或预测来克服时变信道中最小均方（LMS）算法中固有的滞后问题。 因此，本发明能够在以大的步长获得相同的跟踪能力的同时使用小的步长。 将来某个时间的信道估计用于更新均衡器滤波器抽头系数。 这可以用预测滤波器来执行。 或者，可以在输入数据中将延迟（104）引入到滤波器抽头系数产生器（114），这使得信道估计看起来像对滤波器抽头系数发生器的预测。

公开(公告)号：WO2007127388A3

公开(公告)日：2007-12-21

申请号：PCT/US2007010276

申请日：2007-04-27

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J

Inventor： PIETRASKI PHILIP J

IPC: H04L1/00

CPC classification number: H04W72/085 ,  H04J13/00 ,  H04J13/16 ,  H04L1/0003 ,  H04L1/0015 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0066

Abstract: A method and apparatus enhance the selection of transport block set size (TBSS), number of spreading codes, and modulation type, referred to collectively as transport format resource combination (TFRC), in a medium access control (MAC) layer for transmission of data in a code division multiple access (CDMA) wireless communication system, preferably a Universal Mobile Telecommunications Systems (UMTS) high speed downlink packet access (HSDPA) communication system. The maximum number of spreading codes available for transmission and the set of possible TFRCs are preferably determined based on a channel characteristics provided in part by a channel quality indicator (CQI). For each TBSS value in the set of possible TFRCs, a TFRC is selected with the largest number of spreading codes within the maximum number of spreading codes for which the corresponding coding rate is preferably at least 1/3. The corresponding code rate for each selected TFRCs is compared to a threshold to select a corresponding type of modulation. One of the selected TFRCs is selected to be provided to the PHY layer that best matches the CQI and preferably has a maximum TBSS.

Abstract translation: 方法和装置在用于传输数据的介质访问控制（MAC）层中增强传输块集大小（TBSS），扩展码数量和调制类型的选择，统称为传输格式资源组合（TFRC） 在码分多址（CDMA）无线通信系统中，优选地是通用移动电信系统（UMTS）高速下行链路分组接入（HSDPA）通信系统。 可用于传输的扩展码的最大数量和可能的TFRC的集合优选地基于由信道质量指示符（CQI）部分提供的信道特性来确定。 对于可能的TFRC集合中的每个TBSS值，在相应的编码速率优选地至少为1/3的扩展码的最大数目内，选择具有最大数量的扩展码的TFRC。 将每个所选TFRC的相应码率与阈值进行比较以选择相应类型的调制。 选择所选择的TFRC中的一个被提供给与CQI最佳匹配的PHY层，并且优选地具有最大TBSS。

公开(公告)号：WO2006052448A3

公开(公告)日：2007-07-05

申请号：PCT/US2005038491

申请日：2005-10-25

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  CASTOR DOUGLAS R

Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  CASTOR DOUGLAS R

IPC: H04J3/16 ,  H04W24/00 ,  H04W28/04 ,  H04W28/18 ,  H04W48/08

CPC classification number: H04L1/0026 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0021 ,  H04L1/1867 ,  H04W24/00 ,  H04W28/18 ,  H04W48/08 ,  H04W52/12 ,  H04W52/20

Abstract: A method and apparatus for adaptively biasing a channel quality indicator (CQI) used for setting a configuration of communication between a transmitter and a receiver in a wireless communication system. The receiver sends a CQI and positive acknowledgement (ACK)/negative acknowledgement (NACK) messages to the transmitter. The ACK/NACK messages indicate the absence or presence of error, respectively, in a transmitted data packet. The CQI is derived from the signal-to-interference ratio (SIR) and the ACK/NACK messages. The transmitter calculates the block error rate (BLER) of the transmitted data packets based upon the ACK/NACK messages sent from the receiver. The transmitter compares the BLER of the transmitted data packets to a target BLER and biases the CQI based on the comparison in order to achieve the target BLER.

Abstract translation: 一种用于在无线通信系统中自适应地偏置用于设置发射机和接收机之间的通信的配置的信道质量指示符（CQI）的方法和装置。 接收机向发射机发送CQI和肯定确认（ACK）/否定确认（NACK）消息。 ACK / NACK消息分别指示在发送的数据分组中不存在或存在错误。 CQI是从信号干扰比（SIR）和ACK / NACK消息导出的。 发射机基于从接收机发送的ACK / NACK消息来计算发送数据分组的块错误率（BLER）。 发送器将发送的数据分组的BLER与目标BLER进行比较，并且基于比较来偏移CQI，以便实现目标BLER。

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：WO2006101703A2

公开(公告)日：2006-09-28

申请号：PCT/US2006007827

申请日：2006-03-06

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA ,  YANG RUI ,  CHINCHOLI AMITH VIKRAM ,  KEARNEY KENNETH P

Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  YANG RUI ,  CHINCHOLI AMITH VIKRAM ,  KEARNEY KENNETH P

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B2201/70701

Abstract: A method and apparatus for compensating for phase noise of symbols spread with a long spreading code are disclosed. To compensate for the phase noise, a phase error estimate is generated from despread symbols with a short spreading code. A phase correcting phasor is applied to chip rate data before despreading the data with a long spreading code. A signal-to-interference ratio (SIR) on a common pilot channel (CPICH) may be calculated by spreading the data with a parent spreading code in an orthogonal variable spreading factor (OVSF) code tree and by combining symbols. Alternatively, a magnitude of the symbols may be used in estimating the SIR. The SIR of a channel using a short spreading code and an SIR of a channel using a long spreading code are measured. The SIR of the channel with the long spreading code may be compensated in accordance with a difference between degradation of the SIRs.

Abstract translation: 公开了一种用于补偿以扩展码扩展的符号的相位噪声的方法和装置。 为了补偿相位噪声，从具有短扩展码的解扩符号产生相位误差估计。 在用扩展码长的数据解扩之前，将相位校正相量应用于码片速率数据。 可以通过在正交可变扩展因子（OVSF）码树中扩展具有父扩展码的数据并通过组合符号来计算公共导频信道（CPICH）上的信号干扰比（SIR）。 或者，可以在估计SIR时使用符号的大小。 测量使用短扩展码的信道的SIR和使用长扩展码的信道的SIR。 具有长扩展码的信道的SIR可以根据SIR的劣化之间的差异来补偿。

公开(公告)号：WO2004073321A3

公开(公告)日：2004-12-09

申请号：PCT/US2004003207

申请日：2004-02-05

Applicant: INTERDIGITAL TECH CORP ,  DEMIR ALPASLAN ,  GRIECO DONALD M ,  HAIM JOHN W ,  BEDNARZ ANDREW F ,  PIETRASKI PHILIP J ,  GUCCIONE LOUIS J ,  CHITRAPU PRABHAKAR R

Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M ,  HAIM JOHN W ,  BEDNARZ ANDREW F ,  PIETRASKI PHILIP J ,  GUCCIONE LOUIS J ,  CHITRAPU PRABHAKAR R

IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/02 ,  H04L7/10 ,  H04W48/16 ,  H04W56/00

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70755 ,  H04B1/709 ,  H04B2201/70701 ,  H04W48/16 ,  H04W56/00

Abstract: A method and system for performing initial cell search is disclosed. Step 1 (208) processing is preformed to detect a peak primary synchronization code (PSC) location (i.e. chip offset or chip location). Step 2 (210) processing is performed to obtain the toffset and code group. Step 3 (212) processing is performed to identify the midamble of a base station with which the WTRU performing the initial cell search may synchronize with.

Abstract translation: 公开了一种用于执行初始小区搜索的方法和系统。 执行步骤1（208）处理以检测峰值主同步码（PSC）位置（即码片偏移或码片位置）。 执行步骤2（210）处理以获得折射和代码组。 执行步骤3（212）处理以识别执行初始小区搜索的WTRU可与其同步的基站的中置码。

公开(公告)号：WO2008121299A3

公开(公告)日：2008-11-27

申请号：PCT/US2008004003

申请日：2008-03-27

Applicant: INTERDIGITAL TECH CORP ,  RUDOLF MARIAN ,  AGHILI BEHROUZ ,  CHITRAPU PRABHAKAR R ,  DICK STEPHEN G ,  PIETRASKI PHILIP J

Inventor： RUDOLF MARIAN ,  AGHILI BEHROUZ ,  CHITRAPU PRABHAKAR R ,  DICK STEPHEN G ,  PIETRASKI PHILIP J

IPC: H04L1/16

CPC classification number: H04W28/06 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0068 ,  H04L1/0073 ,  H04L1/1664 ,  H04L2001/125

Abstract: A method and apparatus for indicating a temporary block flow (TBF) to which a piggybacked acknowledgement/non-acknowledgement (PAN) field is addressed. A PAN check sequence (PCS) is created, for example using a cyclic redundancy check (CRC) encoding.. The PCS is masked with a temporary flow identity (TFI) assigned to a TBF or a mask generated based on the TFI. A data block including the PAN field and the masked PCS is then processed for transmission. The mask may be generated by converting the TFI using an (M, N) code, M being not greater than the number of bits of the PCS and N being the number of bits of the TFI. With this scheme, a TFI may be transmitted in a PAN field without using explicit bits to identify the TBF.

Abstract translation: 用于指示捎带的确认/非确认（PAN）字段被寻址到的临时块流（TBF）的方法和装置。 创建PAN检查序列（PCS），例如使用循环冗余校验（CRC）编码。PCS被分配给分配给TBF的临时流标识（TFI）或基于TFI生成的掩码进行掩蔽。 然后处理包括PAN字段和屏蔽的PCS的数据块以进行传输。 掩模可以通过使用（M，N）码转换TFI来生成，M不大于PCS的比特数，N是TFI的比特数。 使用该方案，可以在PAN字段中传输TFI，而不使用显式位来识别TBF。

公开(公告)号：WO2006052407A3

公开(公告)日：2007-04-12

申请号：PCT/US2005037656

申请日：2005-10-18

Applicant: INTERDIGITAL TECH CORP ,  ZEIRA ARIELA ,  PIETRASKI PHILIP J ,  PAN JUNG-LIN ,  BELURI MIHAELA ,  YANG RUI

Inventor： ZEIRA ARIELA ,  PIETRASKI PHILIP J ,  PAN JUNG-LIN ,  BELURI MIHAELA ,  YANG RUI

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

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

Abstract: 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.

Abstract translation: 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，基于相应的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：WO2006052404A3

公开(公告)日：2007-02-22

申请号：PCT/US2005037602

申请日：2005-10-20

Applicant: INTERDIGITAL TECH CORP ,  PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN

Inventor： PIETRASKI PHILIP J ,  BELURI MIHAELA ,  DEMIR ALPASLAN

IPC: H03H7/30

CPC classification number: H04L25/03019 ,  H04B2201/70701 ,  H04L2025/03687

Abstract: 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, a, used by the adaptive equalizer to update the filter tap coefficient.

Abstract translation: 用于控制结合在收发器（例如，无线发射/接收单元（WTRU））中的自适应均衡器的步长的步长估计器。 步长估计器基于在收发器和另一收发器之间建立的通道的视在速度来更新由自适应均衡器使用的至少一个自适应均衡器抽头。 步长估计器包括速度估计器，信噪比（SNR）平均器和步长映射单元。 速度估计器用于估计信道的视在速度（即，观测和/或测量的信道脉冲响应的变化速率）。 SNR平均器生成公共导频信道（CPICH）SNR估计。 步进大小映射单元使用速度估计和CPICH SNR估计来生成步长大小参数μ和由自适应均衡器使用的滤波器抽头泄漏因子参数a，以更新滤波器抽头系数。

公开(公告)号：WO2006052564A3

公开(公告)日：2006-11-16

申请号：PCT/US2005039547

申请日：2005-11-01

Applicant: INTERDIGITAL TECH CORP ,  PAN JUNG-LIN ,  BELURI MIHAELA C ,  PIETRASKI PHILIP J

Inventor： PAN JUNG-LIN ,  BELURI MIHAELA C ,  PIETRASKI PHILIP J

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L25/03038 ,  H04B1/712 ,  H04B2201/70701 ,  H04L25/03044 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

Abstract: A normalized least means square (NLMS) equalizer including two equalizer filters is disclosed. In one embodiment, a single correction term generator is used to generate correction terms for tap coefficient updates of each of the equalizer filters based on a pilot signal. In another embodiment, two different correction term generators are used to generate correction terms for each of the equalizer filters, whereby one of the correction term generators uses data received from a hard decision unit at the output of one of the equalizer filters to generate correction terms for both of the equalizer filters.

Abstract translation: 公开了包括两个均衡器滤波器的归一化最小均方（NLMS）均衡器。 在一个实施例中，单个校正项生成器被用于基于导频信号生成每个均衡器滤波器的抽头系数更新的校正项。 在另一个实施例中，使用两个不同的校正项发生器来为每个均衡器滤波器产生校正项，由此校正项发生器中的一个使用从在均衡器滤波器之一的输出处的硬判决单元接收的数据来产生校正项 用于两个均衡器滤波器。