公开(公告)号：US08432952B2

公开(公告)日：2013-04-30

申请号：US10720492

申请日：2003-11-24

Applicant: Tracy Fulghum ,  Gregory Edward Bottomley ,  Yi-Pin Eric Wang ,  Ali S. Khayrallah

Inventor： Tracy Fulghum ,  Gregory Edward Bottomley ,  Yi-Pin Eric Wang ,  Ali S. Khayrallah

IPC: H04B1/707

CPC classification number: H04B1/7107 ,  H04B1/712 ,  H04B2201/709727 ,  H04J13/0048

Abstract: Interference, such as inter-symbol interference, from a symbol of interest in a RAKE receiver is reduced. The RAKE receiver comprises a plurality of RAKE fingers, a processor, and a combiner. The plurality of RAKE fingers despread symbols received over multiple paths of a multi-path channel. The processor determines cross-correlations between symbol waveforms from different symbols and multiple paths. The combiner combines the despread symbols using the cross-correlations to reduce interference from the symbol of interest.

Abstract translation: 来自RAKE接收机中感兴趣的符号的干扰，诸如符号间干扰，减少了。 RAKE接收机包括多个RAKE指，处理器和组合器。 多个RAKE手指解扩在多路径信道的多个路径上接收的符号。 处理器确定来自不同符号和多个路径的符号波形之间的互相关。 组合器使用互相关组合解扩符号，以减少来自感兴趣符号的干扰。

公开(公告)号：US08295330B2

公开(公告)日：2012-10-23

申请号：US12177498

申请日：2008-07-22

Applicant: Ning He ,  Gregory E. Bottomley ,  Erik Larsson

Inventor： Ning He ,  Gregory E. Bottomley ,  Erik Larsson

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: According to the teachings presented herein, a method and apparatus for communication signal processing advantageously use a mix of parametric and non-parametric correlation estimation in communication signal processing. Non-parametric estimation generates an “overall” correlation estimate for a received communication signal, and parametric estimation generates a “component” correlation estimate. The component correlation estimate is removed from the overall correlation estimate to form a partial correlation estimate that is used to process the received communication signal at least initially, such as in a pre-equalization stage. The overall and component correlation estimates are generated as impairment and/or data correlation estimates.

Abstract translation: 根据本文给出的教导，用于通信信号处理的方法和装置有利地在通信信号处理中使用参数和非参数相关估计的混合。 非参数估计对接收到的通信信号产生总体相关估计，参数估计产生分量相关估计。 从总体相关估计中去除分量相关估计，以形成一个部分相关估计，该估计用于至少最初处理接收的通信信号，例如在预均衡阶段。 总体和分量相关估计是作为减值和/或数据相关估计产生的。

公开(公告)号：US08295328B2

公开(公告)日：2012-10-23

申请号：US11548528

申请日：2006-10-11

Applicant: Douglas A. Cairns

Inventor： Douglas A. Cairns

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: A control system and method for controlling a spread spectrum receiver such as a generalized Rake (G-Rake) receiver or chip equalizer based on a frequency shift (fD) of a received signal. A hybrid channel estimator outputs a low-rate channel estimate such as a slot average channel estimate if fD is less than or equal to a threshold value. If fD is greater than the threshold, a plurality of high-rate channel estimates such as interpolated channel estimates is produced. An impairment covariance matrix estimates correlations between impairment on different fingers of the G-Rake receiver. The update rate of the matrix is controlled dependent on the value of fD. A combining weights calculator then calculates sets of combining weights based on the channel estimates and the impairment correlation estimates.

Abstract translation: 一种用于基于接收信号的频移（fD）控制诸如广义Rake（G-Rake）接收机或码片均衡器的扩频接收机的控制系统和方法。 如果f D小于或等于阈值，则混合信道估计器输出低速率信道估计，例如时隙平均信道估计。 如果fD大于阈值，则产生诸如内插信道估计之类的多个高速率信道估计。 损伤协方差矩阵估计G-Rake接收器不同手指的损伤之间的相关性。 基于fD的值来控制矩阵的更新速率。 组合权重计算器然后基于信道估计和损害相关估计来计算组合权重集合。

公开(公告)号：US08229044B2

公开(公告)日：2012-07-24

申请号：US11762982

申请日：2007-06-14

Applicant: Andres Reial ,  Girum Alebachew ,  Elias Jonsson

Inventor： Andres Reial ,  Girum Alebachew ,  Elias Jonsson

IPC: H03K5/01

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: The impairment processor described herein uses a look-up table operation to reduce the computational complexity associated with determining an impairment correlation between first and second sample streams for an interference rejection receiver. One exemplary impairment processor iteratively computes multiple partial impairment correlations based on values selected from look-up table(s), and combines the partial impairment correlations to obtain a final impairment correlation between the first and second sample streams. During each iteration, the impairment processor computes a pair of delay offsets corresponding to the respective processing and path delays of the first and second sample streams, computes an index value as a function of a difference between the pair of delay offsets, selects a pre-computed value from the look-up table based on the index value, determines a pulse correlation estimate based on the selected pre-computed value, and determines the partial impairment correlation for that iteration based on the pulse correlation estimate.

Abstract translation: 本文描述的损害处理器使用查找表操作来减少与确定用于干扰抑制接收机的第一和第二采样流之间的损害相关性相关联的计算复杂度。 一个示例性损伤处理器基于从查找表中选择的值迭代地计算多个部分损伤相关性，并组合部分损伤相关性以获得第一和第二样本流之间的最终损害相关性。 在每次迭代期间，损害处理器计算与第一和第二采样流的相应处理和路径延迟相对应的一对延迟偏移，计算作为一对延迟偏移之间的差的函数的索引值， 基于该索引值从查找表计算的值，基于所选择的预先计算的值确定脉冲相关估计，并且基于脉冲相关估计确定该迭代的部分损伤相关性。

公开(公告)号：US08149929B2

公开(公告)日：2012-04-03

申请号：US12239918

申请日：2008-09-29

Applicant: Douglas Cairns ,  Elias Jonsson

Inventor： Douglas Cairns ,  Elias Jonsson

IPC: H04L27/00

CPC classification number: H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

Abstract: A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16QAM or 64QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.

Abstract translation: 一种用于在利用软导频符号的数字通信系统中接收和处理发送符号序列的接收机和方法。 通过用诸如BPSK或QPSK的低阶调制来调制软导频符号，同时以诸如16QAM或64QAM的更高阶调制来调制剩余的符号，发送一组软导频符号比该序列中的剩余符号更高的可靠性。 接收机知道软导频符号的调制类型和位置（时间/频率/码），并首先解调它们。 接收机使用解调的软导频符号作为已知符号来估计所接收的无线电信号的参数。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。

公开(公告)号：US08064498B2

公开(公告)日：2011-11-22

申请号：US12727880

申请日：2010-03-19

Applicant: Vijay Nagarajan ,  Louis L. Scharf ,  Armand P. Narayan

Inventor： Vijay Nagarajan ,  Louis L. Scharf ,  Armand P. Narayan

IPC: H04B1/00

CPC classification number: H04B1/7107 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/709727

Abstract: A receiver employs low-rate processing to synthesize the effect of high-rate interference in a received multi-rate signal. Each high-rate subchannel is analyzed on its low-rate descendents to produce symbol estimates for each low-rate symbol interval. The symbol estimates are applied to low-rate descendent subchannels, which are then combined to synthesize the effects of the high-rate interference. An interference canceller processes the synthesized interference with the received signal for producing an interference-cancelled signal. Alternatively, analogous steps may be applied at high-rate to analyze, synthesize, and cancel the effects of low-rate interference in a multi-rate signal.

Abstract translation: 接收机采用低速率处理来合成接收的多速率信号中的高速率干扰的影响。 在其低速率后代分析每个高速率子信道，以对每个低速率符号间隔产生符号估计。 符号估计适用于低速率后代子信道，然后将其合并，以合成高速率干扰的影响。 干扰消除器处理与接收信号的合成干扰以产生干扰消除信号。 或者，可以以高速率应用类似的步骤来分析，合成和消除多速率信号中的低速率干扰的影响。

公开(公告)号：US08041325B2

公开(公告)日：2011-10-18

申请号：US12107623

申请日：2008-04-22

Applicant: Elias Jonsson ,  Douglas A. Cairns ,  Kazuyoshi Uesaka ,  Hiroaki Watabe

Inventor： Elias Jonsson ,  Douglas A. Cairns ,  Kazuyoshi Uesaka ,  Hiroaki Watabe

IPC: H04B1/10

CPC classification number: H04B1/712 ,  H04B1/7097 ,  H04B2201/709727

Abstract: A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is currently operating in a nonparametric mode and its speed exceeds a first predetermined threshold, the mobile receiver switches to a parametric mode. Conversely, if the mobile receiver is currently in parametric mode and its speed is less than a second predetermined threshold, the mobile receiver switches to nonparametric mode. In one embodiment, the speed may be estimated by a Doppler frequency in the received signal, and the thresholds are Doppler frequencies. In one embodiment, the first and second thresholds are different, creating a hysteresis in the mode switching.

Abstract translation: 具有多模式干扰抑制功能的移动接收机和估计其速度的方法利用高速干扰抑制的参数化方法和低速度的非参数方法。 特别地，如果移动接收机当前正在以非参数模式操作并且其速度超过第一预定阈值，则移动接收机切换到参数模式。 相反，如果移动接收机当前处于参数模式并且其速度小于第二预定阈值，则移动接收机切换到非参数模式。 在一个实施例中，可以通过接收信号中的多普勒频率来估计速度，并且阈值是多普勒频率。 在一个实施例中，第一和第二阈值是不同的，在模式切换中产生迟滞。

公开(公告)号：US07995641B2

公开(公告)日：2011-08-09

申请号：US11935840

申请日：2007-11-06

Applicant: Gregory E. Bottomley ,  Douglas A. Cairns ,  Yi-Pin Eric Wang

Inventor： Gregory E. Bottomley ,  Douglas A. Cairns ,  Yi-Pin Eric Wang

IPC: H04B1/00

CPC classification number: H04B1/7103 ,  H04B1/712 ,  H04B2201/709727

Abstract: As taught herein channelization code power estimates are generated for a number of data channels in a received CDMA signal based on a joint determination process. Joint processing in this context yields improved estimation of data channel code powers and corresponding estimations of noise variance. These improvements arise from exploitation of joint processing of measured data value correlations across two or more data channel codes represented in the received signal. In one or more embodiments, joint determination of data channel code powers comprises forming a correlation matrix as a weighted average of correlations determined for a plurality of data channels. In one or more other embodiments, joint determination of data channel code powers comprises jointly fitting the correlation matrices for a plurality of data channels in a least squares error estimation process.

Abstract translation: 如本文所教导的，基于联合确定过程，对接收的CDMA信号中的多个数据信道生成信道化码功率估计。 在这种情况下的联合处理可以改善数据信道码功率的估计和噪声方差的相应估计。 这些改进是由于在接收到的信号中表示的两个或多个数据信道代码之间对测量的数据值相关性的联合处理的利用。 在一个或多个实施例中，数据信道码功率的联合确定包括形成相关矩阵作为为多个数据信道确定的相关性的加权平均值。 在一个或多个其他实施例中，数据信道码功率的联合确定包括在最小二乘误差估计过程中共同拟合多个数据信道的相关矩阵。

公开(公告)号：US07974997B2

公开(公告)日：2011-07-05

申请号：US11731174

申请日：2007-03-30

Applicant: Eliahou Arviv ,  Robert L. Lang ,  Yi-Chen Li ,  Oliver Ridler ,  Xiao-an Wang

Inventor： Eliahou Arviv ,  Robert L. Lang ,  Yi-Chen Li ,  Oliver Ridler ,  Xiao-an Wang

IPC: G06F17/16

CPC classification number: G06F17/16 ,  H04B1/707 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: In one embodiment, a receiver including one or more signal-processing blocks and a hardware-based matrix co-processor. The one or more signal-processing blocks are adapted to generate a processed signal from a received signal. The hardware-based matrix co-processor includes two or more different matrix-computation engines, each adapted to perform a different matrix computation, and one or more shared hardware-computation units, each adapted to perform a mathematical operation. At least one signal-processing block is adapted to offload matrix-based signal processing to the hardware-based matrix co-processor. Each of the two or more different matrix-computation engines is adapted to offload the same type of mathematical processing to at least one of the one or more shared hardware-computation units.

Abstract translation: 在一个实施例中，接收机包括一个或多个信号处理块和基于硬件的矩阵协处理器。 所述一个或多个信号处理块适于从接收到的信号产生经处理的信号。 基于硬件的矩阵协处理器包括两个或更多个不同的矩阵计算引擎，每个矩阵计算引擎适于执行不同的矩阵计算，以及一个或多个共享硬件计算单元，每个共享硬件计算单元适于执行数学运算。 至少一个信号处理块适于将基于矩阵的信号处理卸载到基于硬件的矩阵协处理器。 两个或更多个不同的矩阵计算引擎中的每一个适于将相同类型的数学处理卸载到一个或多个共享硬件计算单元中的至少一个。

公开(公告)号：US07953049B2

公开(公告)日：2011-05-31

申请号：US11876264

申请日：2007-10-22

Applicant: Johan Nilsson ,  Bengt Lindoff

Inventor： Johan Nilsson ,  Bengt Lindoff

IPC: H04J3/00

CPC classification number: H04L25/067 ,  H04B2201/709727 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/1671 ,  H04L1/1854 ,  H04L5/0007 ,  H04L5/1484 ,  H04L25/0224

Abstract: Receiver resources are allocated based on how subframes are allocated within in a frame between downlink and uplink transmissions and how often the receiver is expected to report feedback information associated with the downlink transmissions. Additional time is available for processing received data blocks if the feedback information derived from those blocks must be reported later than expected due to the unavailability of uplink subframes. According to one embodiment, received signals are processed by receiving transmission configuration information indicating how downlink and uplink subframes are allocated within a frame in the time domain. Based on the transmission configuration information, the receiver determines whether a delay that exceeds a feedback reporting interval assigned to the receiver will occur when reporting feedback information associated with the downlink subframes. Receiver resources are allocated based on whether a delay will occur when reporting the feedback information.

Abstract translation: 基于如何在下行链路和上行链路传输之间的帧内分配子帧来分配接收机资源，以及接收机期望报告与下行链路传输相关联的反馈信息的频率。 如果从这些块导出的反馈信息由于上行链路子帧的不可用性而必须在晚于报告的情况下报告，则附加时间可用于处理接收到的数据块。 根据一个实施例，通过接收指示在时域中的帧内如何分配下行链路和上行链路子帧的传输配置信息来处理所接收的信号。 基于传输配置信息，当报告与下行链路子帧相关联的反馈信息时，接收机确定是否将发生超过分配给接收机的反馈报告间隔的延迟。 基于在报告反馈信息时是否发生延迟来分配接收器资源。