公开(公告)号：US07440489B2

公开(公告)日：2008-10-21

申请号：US09923374

申请日：2001-08-07

Applicant: Erik Dahlman ,  Yi-Pin Eric Wang ,  Paul W. Dent ,  Gregory E. Bottomley ,  Ali Khayrallah ,  Christer Östberg

Inventor： Erik Dahlman ,  Yi-Pin Eric Wang ,  Paul W. Dent ,  Gregory E. Bottomley ,  Ali Khayrallah ,  Christer Östberg

IPC: H04K1/00 ,  H04B15/00 ,  H04L27/30

CPC classification number: H04B1/7115 ,  H04B1/7075 ,  H04B1/709 ,  H04B1/712 ,  H04B2201/7071 ,  H04B2201/709727

Abstract: A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed to produce a first symbol representation for a symbol. A first quality is determined for the first symbol representation. Responsive to the determined first quality, it is determined whether to further process the first symbol representation or to process a second symbol representation for the symbol generated from the spread spectrum signal. The first quality may be determined, for example, by decoding the first symbol representations to generate a decoding metric or error check indicator, such as a CRC result. The symbol representations may be generated and/or evaluated for quality in a serial fashion or a parallel fashion.

Abstract translation: 通过在第一多个相关时间将扩展频谱信号与扩频序列相关来处理扩展频谱信号，以产生第一多个时间偏移相关。 处理第一多个时间偏移相关以产生符号的第一符号表示。 确定第一个符号表示的第一个质量。 响应于确定的第一质量，确定是否进一步处理第一符号表示或处理从扩频信号产生的符号的第二符号表示。 可以例如通过对第一符号表示进行解码以产生诸如CRC结果的解码度量或错误检查指示符来确定第一质量。 符号表示可以以串行方式或并行方式生成和/或评估质量。

公开(公告)号：US20080089403A1

公开(公告)日：2008-04-17

申请号：US11986802

申请日：2007-11-26

Applicant: Kari Hooli ,  Kai Kiiskila ,  Jari Ylioinas ,  Markku Juntti

Inventor： Kari Hooli ,  Kai Kiiskila ,  Jari Ylioinas ,  Markku Juntti

IPC: H04L27/01

CPC classification number: H04L25/03044 ,  H04B1/7097 ,  H04B2201/709727 ,  H04L25/0226 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03617

Abstract: Disclosed is a chip-level or a symbol-level equalizer structure for a multiple transmit and receiver antenna architecture system that is suitable for use on the WCDMA downlink. The equalizer structure takes into account the difference in the natures of inter-antenna interference and multiple access interference and suppresses both inter-antenna interference and multiple access interference (MAI). Enhanced receiver performance is achieved with a reasonable implementation complexity. The use of the CDMA receiver architecture, in accordance with this invention, enables the realization of increased data rates for the end user. The CDMA receiver architecture can also be applied in conjunction with space-time transmit diversity (STTD) system architectures.

公开(公告)号：US20080080646A1

公开(公告)日：2008-04-03

申请号：US11538074

申请日：2006-10-03

Applicant: Gregory E. Bottomley ,  Carmela Cozzo

Inventor： Gregory E. Bottomley ,  Carmela Cozzo

IPC: H03D1/00 ,  H04L27/06 ,  H04L1/02

CPC classification number: H04L25/0242 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0228

Abstract: Channel response and impairment correlation estimates are iteratively determined. According to one embodiment of performing channel estimation for use in received signal processing, a channel response estimate is calculated based on an initial impairment correlations estimate and a measured channel response derived from a received signal. A revised impairment correlations estimate is calculated using a parametric approach based on the channel response estimate and the channel response estimate is recalculated based on the revised impairment correlations estimate. According to one embodiment of a wireless communication device, the device comprises a parameter estimation unit configured to iteratively calculate a medium channel response estimate based on a parametric impairment correlations estimate and a measured net channel response derived from a received signal. The wireless communication device also comprises circuitry configured to control how many times the parameter estimation unit calculates the medium channel response estimate.

Abstract translation: 迭代确定信道响应和损害相关估计。 根据对在接收信号处理中使用的信道估计的一个实施例，基于初始损害相关估计和从接收信号导出的测量信道响应来计算信道响应估计。 使用基于信道响应估计的参数方法来计算修正的损害相关估计，并且基于修正的损害相关估计重新计算信道响应估计。 根据无线通信设备的一个实施例，该设备包括参数估计单元，该参数估计单元被配置为基于参数损害相关估计和从接收到的信号导出的测量的净信道响应来迭代地计算介质信道响应估计。 无线通信设备还包括被配置为控制参数估计单元计算媒体信道响应估计的次数的电路。

公开(公告)号：US20080065711A1

公开(公告)日：2008-03-13

申请号：US11931352

申请日：2007-10-31

Applicant: Gregory Bottomley ,  Ali Khayrallah

Inventor： Gregory Bottomley ,  Ali Khayrallah

IPC: G06F17/14

CPC classification number: H04B1/7115 ,  H04B1/7117 ,  H04B2001/70935 ,  H04B2201/70705 ,  H04B2201/70707 ,  H04B2201/709727 ,  H04J13/0048

Abstract: A flexible Fast Walsh Transform circuit provides configurable FWT sizes, and is suitable for use in radio receivers where the received signal may be generated using varying spreading codes and/or varying numbers of multi-codes. Such signal types are commonly encountered in wireless communication systems like those based on the Wideband CDMA (W-CDMA) or IS-2000 (cdma2000) standards, and particularly with the higher data rate provisions of those standards. In one application, a RAKE receiver includes RAKE fingers that each include one of the flexible FWT circuits, such that each finger despreads the received signal using variably sized FWTs in accordance with the characteristics of the received signal. The flexibility in FWT sizing may derive from, for example, the inclusion of separately selectable but differently sized FWT circuits, or from the inclusion of a configurable FWT circuit capable of generating different sizes of FWTs.

Abstract translation: 灵活的快速沃尔什变换电路提供可配置的FWT大小，并且适用于无线电接收机，其中接收信号可以使用变化的扩展码和/或不同数量的多码来产生。 在诸如基于宽带CDMA（W-CDMA）或IS-2000（cdma2000）标准的无线通信系统中通常遇到这样的信号类型，特别是在这些标准的较高数据速率规定中。 在一个应用中，RAKE接收机包括RAKE指，其中每个包括柔性FWT电路之一，使得每个指根据接收信号的特性使用可变大小的FWT来解扩接收信号。 FWT尺寸的灵活性可以来自例如包括单独可选择但不同尺寸的FWT电路，或者包括能够产生不同大小的FWT的可配置FWT电路。

公开(公告)号：US20080064356A1

公开(公告)日：2008-03-13

申请号：US11517533

申请日：2006-09-07

Applicant: Ali S. Khayrallah

Inventor： Ali S. Khayrallah

IPC: H04B1/06

CPC classification number: H04B1/30 ,  H04B7/082 ,  H04B7/0822 ,  H04B7/0868 ,  H04B7/0871 ,  H04B7/0874 ,  H04B2201/709727 ,  H04L27/2602 ,  H04L27/2647 ,  H04W88/06

Abstract: A multiple antenna receiver receives a wideband signal containing two or more sub-signals of interest. The receiver may be selectively configured to receive all sub-signals of interest with all antennas, or to receive different sub-signals of interest with different antennas.

Abstract translation: 多天线接收机接收包含两个或更多个感兴趣的子信号的宽带信号。 接收机可以被选择性地配置成用所有天线接收所有感兴趣的子信号，或者用不同的天线接收不同的感兴趣的子信号。

公开(公告)号：US07310394B2

公开(公告)日：2007-12-18

申请号：US10754340

申请日：2004-01-09

Applicant: Xiao-An Wang

Inventor： Xiao-An Wang

IPC: H04B1/10

CPC classification number: H04B1/712 ,  H04B2201/709727 ,  H04L1/20 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03605 ,  H04L2025/03643

Abstract: Methods of recovering data in a received signal sent in a communications media are disclosed. Composite channel impulse responses are first estimated. Channel-tap locations are then assigned to suppress the interference noises by sequential search schemes or heuristic search schemes based on estimated composite channel impulse responses. A sequential search scheme optimizes a predetermined design criterion in a sequential manner. Also described are recursive evaluations of the design criterion and the inverses of the noise covariance matrices based on the composite channel impulse response during a sequential search. A heuristic search scheme selects channel-tap locations based on a set of pre-selected channel-tap locations. The set of pre-selected channel-tap locations is determined according to the estimated composite channel impulse response. A method of estimating energy levels of known interference sources is also described.

Abstract translation: 公开了在通信介质中发送的接收信号中恢复数据的方法。 首先估计复合信道脉冲响应。 然后分配频道抽头位置以通过基于估计的复合信道脉冲响应的顺序搜索方案或启发式搜索方案来抑制干扰噪声。 顺序搜索方案以顺序方式优化预定的设计标准。 还描述了基于在顺序搜索期间的复合信道脉冲响应的设计标准和噪声协方差矩阵的反演的递归评估。 启发式搜索方案基于一组预先选择的频道抽头位置来选择频道抽头位置。 根据估计的复合信道脉冲响应来确定预先选择的信道抽头位置集合。 还描述了估计已知干扰源的能量水平的方法。

公开(公告)号：US20070189363A1

公开(公告)日：2007-08-16

申请号：US11276069

申请日：2006-02-13

Applicant: Hakan Bengt Eriksson ,  Carmela Cozzo ,  Ali S. Khayrallah ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

Inventor： Hakan Bengt Eriksson ,  Carmela Cozzo ,  Ali S. Khayrallah ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B1/71052 ,  H04B1/711 ,  H04B2201/709727

Abstract: The computational complexity required for interference suppression in the reception of wireless communications from multiple users is reduced by sharing information among the users. In some situations, information indicative of a statistical characteristic of the interference is shared among the users. Delays used to produce the interference statistic information are determined based on rake finger delays employed by the users. In some situations, a parameter estimate that is used to calculate combining weights for the users is shared among the users.

Abstract translation: 通过在用户之间共享信息来减少在多个用户的无线通信的接收中的干扰抑制所需的计算复杂度。 在某些情况下，用户之间共享指示干扰的统计特性的信息。 用于产生干扰统计信息的延迟是基于用户使用的耙指延迟来确定的。 在某些情况下，用户之间共享用于计算用户组合权重的参数估计。

公开(公告)号：US20070177660A1

公开(公告)日：2007-08-02

申请号：US11700099

申请日：2007-01-31

Applicant: Tsuyoshi Hasegawa

Inventor： Tsuyoshi Hasegawa

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B1/7103 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: A receiving device and a receiving method enabling the high-speed and high-accuracy interference reducing process are provided. The interference reduction receiving device despreading digital signal at a plurality of timings, multiplying each of the signals after being despread by a weight and combining the signals, comprises an estimation unit estimating channel response vector having, as elements, channel estimation values corresponding to the respective timings based on the digital signal, a quantizing unit quantizing the digital signal in the vicinity of the respective timings, a signal correlation matrix generation unit generating a signal correlation matrix having, as the element, each signal correlation value calculated based on the respective quantized signals, and an weight calculating unit calculating the weight based on the channel response vector and the signal correlation matrix.

Abstract translation: 提供了能够实现高速和高精度干扰降低处理的接收装置和接收方法。 所述干扰减少接收装置在多个定时解扩数字信号，将每个所述信号进行解扩后乘以权重并组合所述信号，所述估计单元估计信道响应向量，具有作为元素的信道估计值， 基于数字信号的定时，对各定时附近的数字信号进行量化的量化单元，产生信号相关矩阵的信号相关矩阵，该信号相关矩阵具有基于各量化信号计算出的各信号相关值的信号相关矩阵 以及权重计算单元，基于信道响应向量和信号相关矩阵来计算权重。

公开(公告)号：US07242709B2

公开(公告)日：2007-07-10

申请号：US11285250

申请日：2005-11-22

Applicant: Jorgen S. Nielsen

Inventor： Jorgen S. Nielsen

IPC: H04B1/00

CPC classification number: H04B1/7115 ,  H04B1/7093 ,  H04B2201/709727

Abstract: An adaptive generalized matched filter (AGMF) rake receiver system includes a rake receiver and an AGMF weight determination module. The rake receiver is coupled to a spread spectrum input signal and applies a vector of weight signals to the spread spectrum input signal to compensate for dependant noise and generate a decision variable. The AGMF weight determination module monitors the decision variable and generates the vector of weight signals, wherein optimal values for the vector of weight signals are calculated by the AGMF weight determination module by varying the vector of weight signals until the signal to noise ratio of the decision variable reaches a peak value.

Abstract translation: 自适应广义匹配滤波器（AGMF）耙式接收机系统包括耙式接收机和AGMF权重确定模块。 瑞克接收机耦合到扩展频谱输入信号，并将加权信号矢量施加到扩展频谱输入信号以补偿相关噪声并产生决定变量。 AGMF加权确定模块监视判定变量并产生加权信号的向量，其中由权重信号权重确定模块通过改变权重信号的向量来计算权重信号的向量的最佳值，直到判决的信噪比 变量达到峰值。

公开(公告)号：US20070147481A1

公开(公告)日：2007-06-28

申请号：US11314740

申请日：2005-12-22

Applicant: Gregory Bottomley ,  Jung-Fu Cheng

Inventor： Gregory Bottomley ,  Jung-Fu Cheng

IPC: H04B1/00 ,  H03D1/00 ,  H04B1/10

CPC classification number: H03M13/2957 ,  H03M13/6331 ,  H04B1/712 ,  H04B2201/709727 ,  H04L1/0048 ,  H04L1/005 ,  H04L25/03063

Abstract: A linear turbo-equalizer for use in a CDMA receiver equalizes a despread received signal (rather than the spread received signal) to suppress self-interference resulting from coupling between transmitted symbols. In an example implementation, a linear equalizer based on a generalized-Rake (G-Rake) receiver design uses decoder feedback in forming Rake combining weights as well as in forming a self-interference estimate removed from the equalizer signal provided to the decoder. Preferably, turbo de-coding is also performed. In that case, each turbo-decoder component preferably executes one pass before feeding back information to the equalizer. This ensures that the turbo-decoder does not prematurely lock onto an incorrect code word before feeding back extrinsic information to the equalizer.

Abstract translation: 用于CDMA接收机的线性turbo均衡器使解扩展的接收信号（而不是扩展接收信号）均衡，以抑制由传输符号之间的耦合产生的自干扰。 在示例实现中，基于广义Rake（G-Rake）接收机设计的线性均衡器在形成Rake组合权重时使用解码器反馈，以及形成从提供给解码器的均衡器信号中去除的自干扰估计。 优选地，还执行turbo解码。 在这种情况下，每个turbo解码器组件优选地在将信息反馈给均衡器之前执行一次通过。 这确保了在将外部信息反馈给均衡器之前，turbo解码器不会过早地锁定到不正确的代码字。