公开(公告)号：US07477710B2

公开(公告)日：2009-01-13

申请号：US11005679

申请日：2004-12-07

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

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

IPC分类号： H04B1/10

CPC分类号： H04B1/7103 ,  H04B1/7107

摘要： The present invention provides systems and methods for signal cancellation with a receiver. The receiver comprises a discretizer configured for generating digital signals at different resolutions from a received analog signal. Processing fingers of the receiver generate spreading codes from at least one of the digital signals while a Coded Signal Processing Engine (“CSPE”) substantially cancels interference from at least another one of the digital signals. The spreading codes are transferred to the CSPE where they may be used to construct an interference matrix. One or more cancellation operators may be generated and subsequently applied to the digital signal(s) input to the CSPE to substantially cancel the interference therefrom. The CSPE may adjust the number of bits of the substantially interference cancelled signal(s) to meet a requisite bit width or dynamic range of the receiver. The substantially cancelled signal(s) is then transferred to the processing fingers for further processing.

摘要翻译： 本发明提供了一种使用接收机进行信号消除的系统和方法。 接收机包括被配置为从接收到的模拟信号产生不同分辨率的数字信号的离散器。 接收机的处理手指从数字信号中的至少一个产生扩展码，同时编码信号处理引擎（“CSPE”）基本上消除至少另一个数字信号的干扰。 扩展码被传送到CSPE，在那里它们可以被用来建立一个干扰矩阵。 可以生成一个或多个取消操作符，并且随后将其应用于输入到CSPE的数字信号，从而基本上消除其干扰。 CSPE可以调整基本上干扰消除的信号的比特数以满足接收机的必要比特宽度或动态范围。 然后将基本上取消的信号传送到处理指状物用于进一步处理。

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。

公开(公告)号：US20110064172A1

公开(公告)日：2011-03-17

申请号：US12916467

申请日：2010-10-29

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

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

IPC分类号： H04L25/08

CPC分类号： H04B1/71072 ,  H04B1/7097 ,  H04B1/7107 ,  H04B1/71075 ,  H04B1/7115 ,  H04B1/7117 ,  H04B15/00 ,  H04B2001/71077 ,  H04B2201/709718 ,  H04J13/00 ,  H04J13/0048 ,  H04L43/08 ,  H04W24/08

摘要： A receiver in a CDMA system comprises a front end processor that generates a combined signal per source. A symbol estimator processes the combined signal to produce symbol estimates. An S-Matrix Generation module refines these symbol estimates based on the sub channel symbol estimates. An interference canceller is configured for cancelling interference from at least one of the plurality of received signals for producing at least one interference-cancelled signal.

摘要翻译： CDMA系统中的接收机包括每个源产生组合信号的前端处理器。 符号估计器处理组合信号以产生符号估计。 S矩阵生成模块基于子信道符号估计来优化这些符号估计。 一个干扰消除器被配置为消除来自多个接收信号中的至少一个的干扰，用于产生至少一个干扰消除信号。

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。

公开(公告)号：US08090006B2

公开(公告)日：2012-01-03

申请号：US12916467

申请日：2010-10-29

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

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

IPC分类号： H04B1/00

CPC分类号： H04B1/71072 ,  H04B1/7097 ,  H04B1/7107 ,  H04B1/71075 ,  H04B1/7115 ,  H04B1/7117 ,  H04B15/00 ,  H04B2001/71077 ,  H04B2201/709718 ,  H04J13/00 ,  H04J13/0048 ,  H04L43/08 ,  H04W24/08

摘要： A receiver in a CDMA system comprises a front end processor that generates a combined signal per source. A symbol estimator processes the combined signal to produce symbol estimates. An S-Matrix Generation module refines these symbol estimates based on the sub channel symbol estimates. An interference canceller is configured for cancelling interference from at least one of the plurality of received signals for producing at least one interference-cancelled signal.

摘要翻译： CDMA系统中的接收机包括每个源产生组合信号的前端处理器。 符号估计器处理组合信号以产生符号估计。 S矩阵生成模块基于子信道符号估计来优化这些符号估计。 一个干扰消除器被配置为消除来自多个接收信号中的至少一个的干扰，用于产生至少一个干扰消除信号。

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。

公开(公告)号：US07474690B2

公开(公告)日：2009-01-06

申请号：US10935669

申请日：2004-09-07

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

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

IPC分类号： H04B1/00

CPC分类号： H04B1/71075 ,  H04B1/7115 ,  H04J13/0022

摘要： The present invention provides systems and methods for parallel interference suppression. A processing engine is used to substantially cancel a plurality of signal paths and selected channel(s) of these signal paths interfering with a selected signal. The processing engine includes a plurality of matrix generators that are used to generate matrices with each matrix comprising elements of one or more of the interfering signal paths and channels selected for cancellation. The processing engine also includes one or more processors for processing the matrices to generate cancellation operators. A plurality of applicators applies the cancellation operators to parallel input signals to substantially cancel the interfering signal from each input signal. These input signals may include received signals and/or reference codes. The embodiments disclosed herein may be particularly advantageous to systems employing CDMA (e.g., such as cdmaOne and cdma2000), Wideband CDMA, Broadband CDMA, UMTS and Global Positioning System (“GPS”) signals.

摘要翻译： 本发明提供了用于并行干扰抑制的系统和方法。 处理引擎用于基本上消除干扰所选信号的这些信号路径的多个信号路径和所选择的信道。 处理引擎包括多个矩阵生成器，其用于生成矩阵，每个矩阵包括一个或多个干扰信号路径的元素和被选择用于取消的信道。 处理引擎还包括用于处理矩阵以产生取消操作符的一个或多个处理器。 多个施加器将取消操作器应用于并行输入信号以基本上抵消来自每个输入信号的干扰信号。 这些输入信号可以包括接收的信号和/或参考码。 本文公开的实施例对于使用CDMA（例如，诸如cdmaOne和cdma2000），宽带CDMA，宽带CDMA，UMTS和全球定位系统（“GPS”）信号的系统可能是特别有利的。

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。

公开(公告)号：US07039136B2

公开(公告)日：2006-05-02

申请号：US10763346

申请日：2004-01-23

申请人： Eric S. Olson ,  John K. Thomas ,  Wolfgang Kober ,  Robert K. Krumvieda

发明人： Eric S. Olson ,  John K. Thomas ,  Wolfgang Kober ,  Robert K. Krumvieda

IPC分类号： H03D1/04

CPC分类号： H04B1/7103 ,  H04B1/7107 ,  H04B2001/70706

摘要： The present invention provides systems and methods for decreasing interference in a selected coded signal. The system includes a matrix generator for generating a matrix. The matrix may comprise vectors, the elements of which are formed from components of the interference. The interference may exist in the form of co-channel and/or cross channel interference, such as that found in CDMA telephony. The components of this interference may, therefore, be code components of the interference that are used to fill elements of the vectors. Each element of a vector may represent a code component of an interfering coded signal. A processor uses the matrix to substantially remove the interference from the selected coded signal. For example, the processor may generate a projection operator that projects the coded signal substantially orthogonal to the interference such that the impact of interference on the selected coded signal is substantially reduced.

摘要翻译： 本发明提供用于减少所选编码信号中的干扰的系统和方法。 该系统包括用于产生矩阵的矩阵发生器。 矩阵可以包括向量，其元素由干扰的分量形成。 干扰可以以同频道和/或交叉信道干扰的形式存在，例如在CDMA电话中发现的干扰。 因此，该干扰的分量可以是用于填充向量元素的干扰的代码分量。 向量的每个元素可以表示干扰编码信号的代码分量。 处理器使用矩阵来基本上去除所选择的编码信号的干扰。 例如，处理器可以产生投影运算符，投影运算符将经编码的信号基本上与干涉正交，使得干扰对所选择的编码信号的影响显着减小。

公开(公告)号：US07200183B2

公开(公告)日：2007-04-03

申请号：US10294834

申请日：2002-11-15

申请人： Eric S. Olson ,  John K. Thomas

发明人： Eric S. Olson ,  John K. Thomas

IPC分类号： H04B15/00

CPC分类号： H04B1/7107 ,  H04B1/7105 ,  H04B1/7117

摘要： A novel method for generating an interference matrix S is disclosed. The method comprises the following steps: A) Determining the number of active channels N in a transmitter; B) Selecting the transmitter to be canceled and assigning the transmitters sequentially to the variable t; C) Selecting the channel to be cancelled and assigning the channels sequentially to the variable n, where n is less than or equal to N; D) Determining if a multipath signal should be canceled and assigning the multipaths of interest to the respective variable M; E) Generating a sequence of column vectors V; F) Repeating steps B, C, D, E, F and G for each column vector of interest; and G) Defining the S matrix as S=[V1 V2 . . . Vc] wherein the index denotes the column index c. In addition, an apparatus for generating the interference matrix is also disclosed.

摘要翻译： 公开了一种用于产生干涉矩阵S的新颖方法。 该方法包括以下步骤：A）确定发射机中有效信道数N; B）选择要取消的发射机，并将发射机顺序分配给变量t; C）选择要取消的通道并将通道顺序分配给变量n，其中n小于或等于N; D）确定多径信号是否应被取消，并将感兴趣的多路径分配给相应的变量M; E）生成列向量V的序列; F）针对感兴趣的每个列向量重复步骤B，C，D，E，F和G; 和G）将S矩阵定义为S = [V 1/2> 2 。 。 。 其中该索引表示列索引c。 此外，还公开了一种用于产生干涉矩阵的装置。