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33 条记录 (耗时 0.024 秒)

    System and method for adjusting phase
    2.
    发明授权
    System and method for adjusting phase 有权
    调整相位的系统和方法

    公开(公告)号：US07068706B2

    公开(公告)日：2006-06-27

    申请号：US10686359

    申请日：2003-10-15

    申请人： Anand P. Narayan ,  Prashant Jain ,  Eric S. Olson

    发明人： Anand P. Narayan ,  Prashant Jain ,  Eric S. Olson

    IPC分类号： H04B1/69

    CPC分类号： H04J13/0048 ,  H04L2027/0046

    摘要： Systems and methods for adjusting phase of a signal are provided. In one embodiment, the system includes a phase compensator configured for adjusting phase of the signal based on filtered and unfiltered representations of a first component of the signal and based on filtered and unfiltered representations of a second component of the signal. For example, the phase compensator may provide phase adjusted I and Q components of a complex signal through a plurality of multiplications of filtered and unfiltered I and Q components. The system also includes a detector that is communicatively coupled to the phase compensator. The detector is configured for combining the first and the second components with a code sequence to determine a complex amplitude of a channel.

    摘要翻译： 提供了一种调整信号相位的系统和方法。 在一个实施例中，系统包括相位补偿器，该相位补偿器被配置为基于信号的第一分量的滤波和未滤波表示并且基于信号的第二分量的滤波和未滤波表示来调整信号的相位。 例如，相位补偿器可以通过滤波和未滤波的I和Q分量的多次乘法来提供复信号的相位调整的I和Q分量。 该系统还包括通信地耦合到相位补偿器的检测器。 检测器被配置用于组合第一和第二分量与码序列以确定信道的复振幅。

    Method and apparatus for selectively applying interference cancellation in spread spectrum systems
    3.
    发明授权
    Method and apparatus for selectively applying interference cancellation in spread spectrum systems 有权
    用于在扩频系统中选择性地应用干扰消除的方法和装置

    公开(公告)号：US07787518B2

    公开(公告)日：2010-08-31

    申请号：US10669954

    申请日：2003-09-23

    申请人： Anand P. Narayan ,  Eric S. Olson ,  Prashant Jain

    发明人： Anand P. Narayan ,  Eric S. Olson ,  Prashant Jain

    IPC分类号： H04B1/69

    CPC分类号： H04B1/7117 ,  H04B1/7107 ,  H04B1/71072 ,  H04B1/7115 ,  H04B2001/71077

    摘要： The present invention is directed to the selective provision of interference canceled signal streams to demodulating fingers in a communication receiver. According to the present invention, potential interferer signal paths are identified. Signal streams having one or more potential interferer signals removed or canceled are created, and a correlation is performed to determine whether the strength of a desired signal path increased as a result. If the correlation indicates that the strength of a desired signal path was increased by the signal cancellation, the interference canceled signal stream is provided to the demodulation finger assigned to track the desired signal path. If the correlation determines that the strength of the desired signal path did not increase as a result of performing interference cancellation, the raw or a different interference canceled signal stream is provided to the demodulation finger.

    摘要翻译： 本发明涉及在通信接收机中选择性地提供干扰消除信号流来解调手指。 根据本发明，识别潜在的干扰信号路径。 产生具有去除或取消的一个或多个潜在干扰信号的信号流，并且执行相关性以确定所需信号路径的强度是否随之增加。 如果相关性指示所需信号路径的强度通过信号消除而增加，则将干扰消除信号流提供给被分配用于跟踪期望信号路径的解调手指。 如果相关性确定期望信号路径的强度作为执行干扰消除的结果没有增加，则原始或不同的干扰消除信号流被提供给解调手指。

    METHOD AND APPARATUS FOR SELECTIVELY APPLYING INTERFERENCE CANCELLATION IN SPREAD SPECTRUM SYSTEMS
    5.
    发明申请
    METHOD AND APPARATUS FOR SELECTIVELY APPLYING INTERFERENCE CANCELLATION IN SPREAD SPECTRUM SYSTEMS 有权
    选择性地在传播频谱系统中应用干扰消除的方法和装置

    公开(公告)号：US20100323624A1

    公开(公告)日：2010-12-23

    申请号：US12871748

    申请日：2010-08-30

    申请人： Anand P. Narayan ,  Eric S. Olson ,  Prashant Jain

    发明人： Anand P. Narayan ,  Eric S. Olson ,  Prashant Jain

    IPC分类号： H04B15/00

    CPC分类号： H04B1/7117 ,  H04B1/7107 ,  H04B1/71072 ,  H04B1/7115 ,  H04B2001/71077

    摘要： The present invention is directed to the selective provision of interference canceled signal streams to demodulating fingers in a communication receiver. According to the present invention, potential interferer signal paths are identified. Signal streams having one or more potential interferer signals removed or canceled are created, and a correlation is performed to determine whether the strength of a desired signal path increased as a result. If the correlation indicates that the strength of a desired signal path was increased by the signal cancellation, the interference canceled signal stream is provided to the demodulation finger assigned to track the desired signal path. If the correlation determines that the strength of the desired signal path did not increase as a result of performing interference cancellation, the raw or a different interference canceled signal stream is provided to the demodulation finger.

    摘要翻译： 本发明涉及在通信接收机中选择性地提供干扰消除信号流来解调手指。 根据本发明，识别潜在的干扰信号路径。 产生具有去除或取消的一个或多个潜在干扰信号的信号流，并且执行相关性以确定所需信号路径的强度是否随之增加。 如果相关性指示所需信号路径的强度通过信号消除而增加，则将干扰消除信号流提供给被分配用于跟踪期望信号路径的解调手指。 如果相关性确定期望信号路径的强度作为执行干扰消除的结果没有增加，则原始或不同的干扰消除信号流被提供给解调手指。

    Method and apparatus for interference suppression with efficient matrix inversion in a DS-CDMA system
    6.
    发明授权
    Method and apparatus for interference suppression with efficient matrix inversion in a DS-CDMA system 有权
    用于DS-CDMA系统中有效矩阵求逆的干扰抑制方法和装置

    公开(公告)号：US07430253B2

    公开(公告)日：2008-09-30

    申请号：US10686828

    申请日：2003-10-15

    申请人： Eric S. Olson ,  Anand P. Narayan ,  Prashant Jain ,  John K. Thomas

    发明人： Eric S. Olson ,  Anand P. Narayan ,  Prashant Jain ,  John K. Thomas

    IPC分类号： H04L27/00

    CPC分类号： H04B1/71052 ,  H04B1/7107 ,  H04B1/7117 ,  H04B1/712

    摘要： The present invention is directed to signal cancellation in spread spectrum communication systems. In particular, the present invention provides method and apparatus for selectively canceling interfering signals, even where symbols to be canceled do not align with symbols associated with a desired signal path. Furthermore, the interference cancellation provided by embodiments of the present invention is capable of functioning to remove interference associated with channels utilizing a symbol length that is different than the symbol length of a desired signal path. In accordance with a further embodiment of the present invention, method and apparatus for efficiently calculating projections to enable signal cancellation are provided.

    摘要翻译： 本发明涉及扩频通信系统中的信号消除。 特别地，本发明提供了用于选择性地消除干扰信号的方法和装置，即使要被取消的符号不与符合期望信号路径的符号对齐。 此外，由本发明的实施例提供的干扰消除能够利用不同于期望信号路径的符号长度的符号长度去除与信道相关的干扰。 根据本发明的另一实施例，提供了用于有效地计算投影以启用信号消除的方法和装置。

    Methods for managing alignment and latency in interference suppression
    7.
    发明申请
    Methods for managing alignment and latency in interference suppression 有权
    用于管理干扰抑制中的对准和延迟的方法

    公开(公告)号：US20120195360A1

    公开(公告)日：2012-08-02

    申请号：US13314787

    申请日：2011-12-08

    申请人： Anand P. Narayan ,  Greg Graham ,  David R. Meyer ,  Prashant Jain

    发明人： Anand P. Narayan ,  Greg Graham ,  David R. Meyer ,  Prashant Jain

    IPC分类号： H04B15/00 ,  H04L27/01

    CPC分类号： H04B1/7097 ,  G01S5/0215 ,  G01S5/10 ,  G01S19/22 ,  H04B1/7093 ,  H04B1/7105 ,  H04B1/7117 ,  H04B2001/70935 ,  H04B2201/70701 ,  H04B2201/70715

    摘要： An interference cancelling receiver combines data from multiple paths after aligning to transmitter timing, and uses either an equalizer or a Rake receiver to compute symbol estimates. Interference estimates are generated from the symbol estimates, and multiple interference estimates are combined after re-aligning the interference estimates to receiver timing. At least two segments of symbol estimates are computed for each segment of interference cancelled data.Various techniques may be employed for controlling the latency and sequencing of these operations, and the subsystems within the canceller may use different processing clock speeds.

    摘要翻译： 干扰消除接收机在对准发射机定时之后组合来自多个路径的数据，并且使用均衡器或Rake接收机来计算符号估计。 从符号估计产生干扰估计，并且在将干扰估计重新对准接收机定时之后组合多个干扰估计。 对干扰消除数据的每个段计算符号估计的至少两个段。 可以采用各种技术来控制这些操作的等待时间和顺序，并且消除器内的子系统可以使用不同的处理时钟速度。

    Method and apparatus for channel amplitude estimation and interference vector construction
    9.
    发明授权
    Method and apparatus for channel amplitude estimation and interference vector construction 有权
    用于信道幅度估计和干扰矢量构造的方法和装置

    公开(公告)号：US07580448B2

    公开(公告)日：2009-08-25

    申请号：US10686829

    申请日：2003-10-15

    申请人： Anand P. Narayan ,  Prashant Jain

    发明人： Anand P. Narayan ,  Prashant Jain

    IPC分类号： H04B1/00

    CPC分类号： H04J13/0048 ,  H04B1/7107 ,  H04B1/7117 ,  H04B2001/70935 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04J11/0056

    摘要： The present invention is directed to an efficient method and apparatus for channel determination and interference vector construction in accordance with spread spectrum systems. Channel determination is performed using a first series of fast Walsh transform steps. The results of the first set of fast Walsh transform steps corresponding to valid communication system channels are compared to a threshold value. Results derived from the first set of fast Walsh transform steps are then passed through a second set of fast Walsh transform steps with the number of steps performed for a set of results determined by the symbol length associated with the channels from which the amplitude information was derived. The interference vectors thus obtained for each valid symbol length may then be combined to form a composite interference vector. The fast Walsh transform steps and other steps may be performed using shared hardware components or software modules.

    摘要翻译： 本发明涉及一种根据扩频系统的信道确定和干扰矢量构造的有效方法和装置。 使用第一系列快速沃尔什变换步骤执行信道确定。 将与有效通信系统信道相对应的第一组快速沃尔什变换步骤的结果与阈值进行比较。 从第一组快速沃尔什变换步骤得到的结果然后被传递通过第二组快速沃尔什变换步骤，其中为通过与从其导出振幅信息的信道相关联的符号长度确定的一组结果执行步骤数 。 然后可以将由此获得的每个有效符号长度的干扰矢量组合以形成复合干涉矢量。 可以使用共享硬件组件或软件模块来执行快速沃尔什变换步骤和其他步骤。