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    METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER
    11.
    发明申请
    METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER 审中-公开
    用于估计和校正接收器中基带频率误差的方法和装置

    公开(公告)号：WO2006052398A2

    公开(公告)日：2006-05-18

    申请号：PCT/US2005/037416

    申请日：2005-10-19

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PIETRASKI, Philip, J. ,  YANG, Rui ,  BELURI, Mihaela ,  DEMIR, Alpaslan

    Inventor： PIETRASKI, Philip, J. ,  YANG, Rui ,  BELURI, Mihaela ,  DEMIR, Alpaslan

    IPC: H03H7/40

    CPC classification number: H04B1/7097 ,  H04B1/712 ,  H04L25/03248

    Abstract: A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. In another embodiment, a channel estimator performs channel estimation and generates Rake receiver finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights.

    Abstract translation: 一种用于估计和校正接收机中基带频率误差的方法和装置。 在一个实施例中，均衡器对采样数据流执行均衡，并且基于均衡产生滤波器抽头值。 基于滤波器抽头值中的至少一个产生估计频率误差信号。 基于估计的频率误差信号产生旋转相量。 将旋转相量信号与样本数据流相乘以校正样本数据流的频率。 在另一个实施例中，信道估计器执行信道估计，并且基于手指权重中的至少一个生成耙式接收器手指权重。 基于手指权重中的至少一个产生估计的频率误差信号。

    METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER
    15.
    发明申请
    METHOD AND APPARATUS FOR ESTIMATING THE STEP-SIZE OF AN ADAPTIVE EQUALIZER 审中-公开
    用于估计自适应均衡器的步长的方法和装置

    公开(公告)号：WO2006052404A2

    公开(公告)日：2006-05-18

    申请号：PCT/US2005/037602

    申请日：2005-10-20

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PIETRASKI, Philip, J. ,  BELURI, Mihaela ,  DEMIR, Alpaslan

    Inventor： PIETRASKI, Philip, J. ,  BELURI, Mihaela ,  DEMIR, Alpaslan

    IPC: H03D1/04 ,  H03K5/159

    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, α , 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。

    METHOD AND SYSTEM FOR CONTINUOUSLY COMPENSATING FOR PHASE VARIATIONS INTRODUCED INTO A COMMUNICATION SIGNAL BY AUTOMATIC GAIN CONTROL ADJUSTMENTS
    17.
    发明申请
    METHOD AND SYSTEM FOR CONTINUOUSLY COMPENSATING FOR PHASE VARIATIONS INTRODUCED INTO A COMMUNICATION SIGNAL BY AUTOMATIC GAIN CONTROL ADJUSTMENTS 审中-公开
    用于通过自动增益控制调整引入通信信号的相位变化的连续补偿方法和系统

    公开(公告)号：WO2005002074A1

    公开(公告)日：2005-01-06

    申请号：PCT/US2004/014100

    申请日：2004-05-06

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

    Inventor： DEMIR, Alpaslan ,  KAZAKEVICH, Leonid ,  HAQUE, Tanbir

    IPC: H04B1/06

    CPC classification number: H04L27/3809 ,  H03G3/001 ,  H03G3/3052 ,  H04B1/30 ,  H04L27/38 ,  H04L2027/003 ,  H04L2027/0046 ,  H04W52/52

    Abstract: A communication system (100) including an automatic control (AGC) circuit (105), a receiver (110), an analog to digital (ADC) converter (115) and an insertion phase variation compensation module (120). The AGC circuit receives and amplifies communication signals (150). The gain of the AGC circuit is adjusted. The AGC circuit outputsan amplified signal (145) to the receiver which, in turn, outputs an analog complex signal to the ADC (115). The ADC outputs a digital complex signal to the insertion phase variation compensation module (120) which counteracts the effects of phase offsets introduced into the communication signal due to the continuous gain adjustments associated with the AGC circuit.

    Abstract translation: 一种包括自动控制（AGC）电路（105），接收机（110），模数（ADC）转换器（115）和插入相位变化补偿模块（120）的通信系统（100）。 AGC电路接收并放大通信信号（150）。 调整AGC电路的增益。 AGC电路将放大信号（145）输出到接收器，接收器又将模拟复合信号输出到ADC（115）。 ADC向插入相位变化补偿模块（120）输出数字复合信号，该模块抵消由于与AGC电路相关联的连续增益调整而引入到通信信号中的相位偏移的影响。

    UNSUITABLE CELL EXCLUSION IN WIRELESS COMMUNICATION SYSTEMS
    18.
    发明申请
    UNSUITABLE CELL EXCLUSION IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
    无线通信系统中的无用单元排除

    公开(公告)号：WO2004066543A2

    公开(公告)日：2004-08-05

    申请号：PCT/US2004/001963

    申请日：2004-01-23

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DEMIR, Alpaslan ,  GRIECO, Donald, M. ,  HAIM, John W. ,  BEDNARZ, Andrew, F.

    Inventor： DEMIR, Alpaslan ,  GRIECO, Donald, M. ,  HAIM, John W. ,  BEDNARZ, Andrew, F.

    IPC: H04L

    CPC classification number: H04W48/10 ,  H04W48/02 ,  H04W48/16 ,  H04W56/00

    Abstract: A method and system for performing initial cell search in wireless communication system wherein unsuitable cells are excluded is disclosed. Stored frequencies are searched exhaustively and initial frequencies are search non-exhaustively. Initial frequencies may be searched exhaustively in certain circumstances. When performing exhaustive initial cell searches, primary synchronization codes that lead to unsuitable cells are excluded from subsequent initial cell searches performed on the same frequency.

    Abstract translation: 公开了一种用于在无线通信系统中执行初始小区搜索的方法和系统，其中不适合的小区被排除。 存储的频率被彻底搜索，并且初始频率被非穷举地搜索。 在某些情况下可以彻底地搜索初始频率。 当执行穷举的初始小区搜索时，导致不合适小区的主同步码被从在相同频率上执行的后续初始小区搜索中排除。

    MITIGATION OF INTERFERENCE IN CELL SEARCH BY WIRELESS TRANSMIT AND RECEIVE UNITS
    20.
    发明申请
    MITIGATION OF INTERFERENCE IN CELL SEARCH BY WIRELESS TRANSMIT AND RECEIVE UNITS 审中-公开
    通过无线传输和接收单元缓解小区搜索干扰

    公开(公告)号：WO2004025854A1

    公开(公告)日：2004-03-25

    申请号：PCT/US2003/028792

    申请日：2003-09-12

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

    Inventor： PIETRASKI, Philip, J. ,  DEMIR, Alpaslan ,  GRIECO, Donald, M.

    IPC: H04B1/69

    CPC classification number: H04B1/70735 ,  H04B1/70755 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7103 ,  H04B2201/70707

    Abstract: The invention provides embodiments to facilitate cell search. In one embodiment, received samples are split into a plurality of sample sets for processing. Each of the sets is processed and an accumulated result is divided by an estimated noise value. In another embodiment, a code correlator correlates the received signal with a primary synchronization code and an auxiliary code correlator having a same length as the code correlator correlates the received signal with a code having a low cross correlation with the primary synchronization code. In another embodiment, a division of an accumulated result with a noise estimate is performed using indexes of the most significant bits.

    Abstract translation: 本发明提供了便于小区搜索的实施例。 在一个实施例中，将接收到的样本分成多个样本集进行处理。 处理每个集合，并将累积结果除以估计的噪声值。 在另一个实施例中，码相关器将接收的信号与主同步码相关，并且与码相关器具有相同长度的辅助码相关器将接收的信号与与主同步码具有低互相关的代码相关。 在另一个实施例中，使用最高有效位的索引来执行累积结果与噪声估计的分割。

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