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1. 发明申请

US20110069742A1 Method and Apparatus for Interference Suppression with Efficient Matrix Inversion in a DS-CDMA System 有权
标题翻译：用于DS-CDMA系统中有效矩阵反演的干扰抑制方法和装置
公开(公告)号：US20110069742A1
公开(公告)日：2011-03-24
申请号：US12948749
申请日：2010-11-17
申请人： Anand P. Narayan , Eric S. Olson , Prashant Jain , John K. Thomas
发明人： Anand P. Narayan , Eric S. Olson , Prashant Jain , John K. Thomas
IPC分类号： H04B1/10 , H04L1/02 , H04B1/7115
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。

2. 发明授权

US07706430B2 System, apparatus, and method for adaptive weighted interference cancellation using parallel residue compensation 有权
标题翻译：使用并行残差补偿的自适应加权干扰消除的系统，装置和方法
公开(公告)号：US07706430B2
公开(公告)日：2010-04-27
申请号：US11067498
申请日：2005-02-25
申请人： Yuanbin Guo , Dennis McCain , Joseph R. Cavallaro
发明人： Yuanbin Guo , Dennis McCain , Joseph R. Cavallaro
IPC分类号： H04L27/06
CPC分类号： H04B1/71075 , H04B2001/71077 , H04B2201/70707
摘要： A system, apparatus and method for a multi-stage Parallel Residue Compensation (PRC) receiver for enhanced suppression of the Multiple Access Interference (MAI) in Code Division Multiple Access (CDMA) systems. The accuracy of the interference estimation is improved with a set of weights computed from an adaptive Normalized Least Mean Square (NLMS) algorithm. In order to reduce complexity, the commonality of the multi-code processing is extracted and used to derive a structure of PRC to avoid direct interference cancellation. The derived PRC structure reduces the interference cancellation architecture from a complexity that is proportional to the square of the number of users to a complexity that is linear with respect to the number of users. The complexity is further reduced by replacing dedicated multiplier circuits with simple combinational logic.
摘要翻译：一种用于增强抑制码分多址（CDMA）系统中的多址干扰（MAI）的多级并行残差补偿（PRC）接收机的系统，装置和方法。通过从自适应归一化最小二乘法（NLMS）算法计算的一组权重，改善了干扰估计的准确性。为了降低复杂度，提取多码处理的通用性，并用于导出PRC的结构，以避免直接干扰消除。导出的PRC结构从与用户数量的平方成正比于与用户数量相关的复杂度的复杂度降低了干扰消除架构。通过用简单的组合逻辑替换专用乘法电路，进一步降低了复杂度。

3. 发明授权

US07433387B2 Multiple code-set channel estimation method in time-slotted CDMA system 有权
标题翻译：时码CDMA系统中的多码集信道估计方法
公开(公告)号：US07433387B2
公开(公告)日：2008-10-07
申请号：US11181687
申请日：2005-07-14
申请人： Yingmin Wang , Shiyan Ren
发明人： Yingmin Wang , Shiyan Ren
IPC分类号： H04B1/00
CPC分类号： H04B1/7107 , H04B1/7113 , H04B2001/71077
摘要： A channel estimation method for multiple code-sets in a time-slotted CDMA system. The method includes: A) performing a single code-set channel estimation of the received signal of each code-set, respectively, to obtain an original channel estimation, and deciding whether the desired number of iterations is reached; if yes, outputting each single code-set channel estimate; otherwise, going to Step B; B) performing limited time decision for the original channel estimates, retaining taps of channel estimation that meet a certain condition, recovering the interference caused by the response of each code-set using the tap values; canceling the interference caused by the response of other code-sets in the received signal of each code-set to obtain a clean signal of each code-set; taking the clean signal of each code-set as the said received signal of each code-set; and returning to Step A. The method solves the channel estimation problem caused by response signals of multiple code-sets and improves performance of single-code-set channel estimation.
摘要翻译：一种用于时隙CDMA系统中的多个码集的信道估计方法。该方法包括：A）分别执行每个码集的接收信号的单个码集信道估计，以获得原始信道估计，并确定是否达到所需的迭代次数; 如果是，则输出每个单个码集信道估计; 否则，进入步骤B; B）对原始信道估计执行有限的时间决定，保持符合特定条件的信道估计的抽头，利用抽头值恢复由每个码集的响应引起的干扰; 消除由每个码集的接收信号中的其他码集的响应引起的干扰，以获得每个码集的干净信号; 取每个码集的干净信号作为每个码集的所述接收信号; 并返回到步骤A.该方法解决了由多个码集的响应信号引起的信道估计问题，提高了单码集信道估计的性能。

4. 发明授权

US07315567B2 Method and apparatus for partial interference cancellation in a communication system 有权
标题翻译：通信系统中部分干扰消除的方法和装置
公开(公告)号：US07315567B2
公开(公告)日：2008-01-01
申请号：US09875474
申请日：2001-06-06
申请人： Raul E Sequeira
发明人： Raul E Sequeira
IPC分类号： H04B1/00
CPC分类号： H04B1/7107 , H04B2001/71077
摘要： A method of partial interference cancellation of a received signal that includes a first data component and a second data component is disclosed. The method includes the steps of determining a characteristic of the communication channel, estimating a factor based upon the characteristic, using the factor to cancel the second data component from the signal, and recovering the first data component from the signal.
摘要翻译：公开了一种包括第一数据分量和第二数据分量的接收信号的部分干扰消除方法。该方法包括以下步骤：使用从该信号中消除第二数据分量的因子，基于该特性来估计该通信信道的特性，以及从该信号中恢复该第一数据分量。

5. 发明申请

US20050180364A1 Construction of projection operators for interference cancellation 审中-公开
标题翻译：投影操作员构建干扰消除
公开(公告)号：US20050180364A1
公开(公告)日：2005-08-18
申请号：US11100935
申请日：2005-04-07
申请人： Vijay Nagarajan , Louis Scharf , John Thomas
发明人： Vijay Nagarajan , Louis Scharf , John Thomas
IPC分类号： H04B7/216 , H04K1/00
CPC分类号： H04B1/7107 , H04B7/0678 , H04B7/086 , H04B2001/71077 , H04K3/228
摘要： Interference cancellation is performed in a CDMA receiver by projecting a received signal onto a subspace that is orthogonal to a signal selected for removal. An interference matrix or a combined interference vector is used to construct an interference-canceling projection operator. Confidence weights may be provided to components of the interference matrix or the interference vector based on estimation errors or relative strengths of interfering signals. Complexity reduction of the orthogonal projection operator may be achieved by providing for simplifying approximations that remove terms and operations. A linear transformation operator may be applied to the rows and/or columns of the interference matrix or the interference vector prior to construction of the orthogonal projection. Interference cancellation techniques may be configured for processing signals in a transmit-diversity system or a receive-diversity system using time and/or frequency-domain implementations and space and/or wave-number implementations of the transceiver.
摘要翻译：通过将接收的信号投影到与选择去除的信号正交的子空间上，在CDMA接收机中进行干扰消除。干扰矩阵或组合干扰矢量用于构建干扰消除投影算子。可以基于干扰信号的估计误差或相对强度将置信度提供给干扰矩阵的分量或干扰矢量。正交投影算子的复杂度降低可以通过提供简化的除去术语和操作的近似来实现。在构造正交投影之前，可以将线性变换算子应用于干涉矩阵或干涉矢量的行和/或列。干扰消除技术可以被配置用于在发射分集系统或接收分集系统中使用时间和/或频域实现以及收发器的空间和/或波数实现来处理信号。

6. 发明申请

US20050031022A1 Method of partial parallel interference cancellation 失效
标题翻译：部分并行干扰消除方法
公开(公告)号：US20050031022A1
公开(公告)日：2005-02-10
申请号：US10843447
申请日：2004-05-12
申请人： Yih-Min Chen , Hsu-Ching Wang , Chun-Cheng Chen , Fu-Yen Kuo
发明人： Yih-Min Chen , Hsu-Ching Wang , Chun-Cheng Chen , Fu-Yen Kuo
IPC分类号： H04B1/707 , H04J13/02
CPC分类号： H04B1/71075 , H04B2001/71077
摘要： A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one from the received signal. Moreover, the present invention is to take the output of the pre-stage as the input of the present stage with the recursion method so that we can use only one operating circuit to obtain the function the MAI eliminating.
摘要翻译：提供了一种部分并行干扰消除（PPIC）方法，用于从接收信号递归地消除多址干扰。这种方法是使用递归方法从接收到的信号中逐个消除所有的多址干扰（MAI）。此外，本发明是以递归方法将前级的输出作为本阶段的输入，使得只能使用一个操作电路来获得MAI消除的功能。

7. 发明授权

US06404759B1 CDMA multi-user receiving apparatus including interference canceller with optimal receiving state 失效
标题翻译： CDMA多用户接收装置包括具有最佳接收状态的干扰消除器
公开(公告)号：US06404759B1
公开(公告)日：2002-06-11
申请号：US09298912
申请日：1999-04-26
申请人： Takashi Shoji
发明人： Takashi Shoji
IPC分类号： H04J1304
CPC分类号： H04B1/71075 , H04B2001/71077
摘要： A multi-user CDMA (Code Division Multiple Access) interference canceller includes a coefficient output section and a plurality of stages. The coefficient output section dynamically determines a weight coefficient based a reception state of each of a plurality of user signals of a reception signal. Each of the plurality of stages other than the last stage includes a first interference estimating section and a synthesizing unit. The first interference estimating section is provided for each of the plurality of user signals. Also, the first interference estimating section outputs a symbol replica for a next stage and a user reproduction signal for the corresponding user signal based on a symbol replica received from a previous stage, an input signal and a weight coefficient for the corresponding user signal. The synthesizing unit outputs a residual signal for the next stage based on the input signal and the user reproduction signals. The last stage includes a second interference estimating section provided for each of the plurality of user signals. The second interference estimating section outputs a final user reproduction signal based on the symbol replica from the previous stage for the corresponding user signal and the input signal.
摘要翻译：多用户CDMA（码分多址）干扰消除器包括系数输出部分和多个级。系数输出部分基于接收信号的多个用户信号中的每一个的接收状态来动态地确定权重系数。除了最后阶段之外的多个级中的每一个都包括第一干扰估计部分和合成单元。为多个用户信号中的每一个提供第一干扰估计部分。此外，第一干扰估计部分基于从前一级接收的符号副本输入用于下一级的符号副本和用于相应用户信号的用户再现信号，输入信号和用于相应用户信号的权重系数。合成单元基于输入信号和用户再现信号输出下一级的残差信号。最后一级包括为多个用户信号中的每一个提供的第二干扰估计部分。第二干扰估计部分基于来自相应用户信号和输入信号的前一级的符号副本输出最终用户再现信号。

8. 发明授权

US06192067B1 Multistage interference canceller 失效
标题翻译：多级干扰消除器
公开(公告)号：US06192067B1
公开(公告)日：2001-02-20
申请号：US08995251
申请日：1997-12-19
申请人： Takeshi Toda , Yoshinori Tanaka , Shuji Kobayakawa , Hiroyuki Seki , Masafumi Tsutsui
发明人： Takeshi Toda , Yoshinori Tanaka , Shuji Kobayakawa , Hiroyuki Seki , Masafumi Tsutsui
IPC分类号： H04B1500
CPC分类号： H04B1/71075 , H04B2001/71077
摘要： A multistage interference canceller and method for removing interference between users and multipath interference from received signals in multiple stages includes a plurality of despreading units which produce a received symbol vector and an estimated channel value, a synthesis unit which synthesizes the received symbol vector, an amplitude of the received symbol vector and the amplitude of the estimated value from each reverse spreading unit, and a decision unit which executes a hard decision and a soft decision according to a result of comparing the total amplitude of the received symbol vector and the total amplitude of the estimated channel value.
摘要翻译：用于从多个接收信号中消除用户干扰和多径干扰的多级干扰消除器和方法包括产生接收符号向量和估计信道值的多个解扩单元，合成接收到的符号向量的合成单元，振幅以及来自每个反向扩展单元的估计值的幅度的决策单元，以及根据将接收到的符号向量的总振幅与总的振幅进行比较的结果执行硬判决和软判决的判定单元估计的通道值。

9. 发明授权

US5644592A Parallel interference cancellation for CDMA applications 失效
标题翻译： CDMA应用的并行干扰消除
公开(公告)号：US5644592A
公开(公告)日：1997-07-01
申请号：US428306
申请日：1995-04-24
申请人： Dariush Divsalar , Marvin K. Simon , Dan Raphaeli
发明人： Dariush Divsalar , Marvin K. Simon , Dan Raphaeli
IPC分类号： H04B1/7107 , H04B1/707 , H04J13/04
CPC分类号： H04B1/71075 , H04B2001/71077
摘要： The present invention provides a method of decoding a spread spectrum composite signal, the composite signal comprising plural user signals that have been spread with plural respective codes, wherein each coded signal is despread, averaged to produce a signal value, analyzed to produce a tentative decision, respread, summed with other respread signals to produce combined interference signals, the method comprising scaling the combined interference signals with a weighting factor to produce a scaled combined interference signal, scaling the composite signal with the weighting factor to produce a scaled composite signal, scaling the signal value by the complement of the weighting factor to produce a leakage signal, combining the scaled composite signal, the scaled combined interference signal and the leakage signal to produce an estimate of a respective user signal.
摘要翻译：本发明提供一种对扩展频谱复合信号进行解码的方法，该复合信号包括已经被多个相应码扩展的多个用户信号，其中每个编码信号被去扩展，被平均以产生一个信号值，以产生暂定的决定，再与其他再生信号相加以产生组合的干扰信号，所述方法包括以加权因子缩放组合干扰信号以产生缩放的组合干扰信号，以加权因子缩放复合信号以产生缩放复合信号，缩放通过加权因子的补码产生信号值以产生泄漏信号，组合缩放的复合信号，缩放的组合干扰信号和泄漏信号以产生相应用户信号的估计。

10. 发明授权

US5325394A Method and apparatus for canceling spread-spectrum noise 失效
标题翻译：消除扩频噪声的方法和装置
公开(公告)号：US5325394A
公开(公告)日：1994-06-28
申请号：US25705
申请日：1993-03-03
申请人： Eugene Bruckert
发明人： Eugene Bruckert
IPC分类号： H04B1/10 , H04B1/7107 , H04B7/216
CPC分类号： H04B1/7107 , H04B2001/71077
摘要： A spread-spectrum noise canceller (182) is provided. A received phase and a received amplitude for a first (216) and a second (236) component of a received spread-spectrum signal (200) is determined. The second component (236) is structurally similar to [a replica of] the first component (216), but differs by being received at a different time, being transmitted along a different path, or having a different phase [which was received at a different time]. In addition, the spread-spectrum signal (200) includes a first and a second known signal. A portion of a spread-spectrum noise signal in the received signal (200) is canceled by generating an estimated signal (270) by spreading (260) the second known signal at the second component received phase (204) with the first known signal at the first component received phase (224) and adjusting a gain (268) of an integrated form of the spread second known signal as a function of the received amplitudes of the first (216) and the second (236) components. Subsequently, the second known signal is processed out of the received spread-spectrum signal (200) by subtracting (166) the estimated signal (270) from a demodulated form (216, 236) of the received spread-spectrum signal (200).
摘要翻译：提供扩频噪声消除器（182）。确定接收到的扩频信号（200）的第一（216）和第二（236）分量的接收相位和接收幅度。第二组件（236）在结构上类似于第一组件（216）的[副本]，但是不同之处在于在不同的时间被接收，沿着不同的路径发送，或者具有不同的相位不同时间]。此外，扩频信号（200）包括第一和第二已知信号。通过利用第一已知信号在第二分量接收相位（204）处扩展（260）第二已知信号（260）来产生估计信号（270）来消除接收信号（200）中的扩展频谱噪声信号的一部分所述第一分量接收相位（224）并且将所述扩展的第二已知信号的积分形式的增益（268）调整为所述第一（216）和所述第二（236）分量的接收振幅的函数。随后，通过从接收扩频信号（200）的解调形式（216,236）中减去（166）估计信号（270），从接收的扩频信号（200）中处理第二已知信号。

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