公开(公告)号：US07929629B2

公开(公告)日：2011-04-19

申请号：US12027492

申请日：2008-02-07

Applicant: Douglas A. Cairns

Inventor： Douglas A. Cairns

IPC: H04K1/10 ,  H04B1/713

CPC classification number: H04L25/0246 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L25/0224

Abstract: Teachings presented herein present a “whitening” channel estimation method and apparatus that produce high-quality net channel estimates for processing a received signal, such as a received CDMA signal. Processing includes forming an initial least squares problem (for medium channel estimates) using known pilot values and corresponding pilot observations for the received signal, transforming the initial least squares problem using a whitening transformation term, and solving the transformed least squares problem to obtain whitened medium channel estimates. The whitening transformation term may be determined, for example, by carrying out a Cholesky factorization of a (traffic) data correlation matrix, which can be obtained from traffic data values for the received signal. Processing further includes converting the whitened medium channel estimates into whitened net channel estimates, which consider the effects of transmit/receive filtering.

Abstract translation: 本文提出的教导提供了一种“白化”信道估计方法和装置，其产生用于处理诸如接收的CDMA信号的接收信号的高质量净信道估计。 处理包括使用已知导频值和接收信号的相应导频观测形成初始最小二乘问题（对于中等信道估计），使用白化变换项变换初始最小二乘问题，并求解变换最小二乘问题以获得白化介质 渠道估计。 白化变换项可以例如通过执行可以从接收信号的业务数据值获得的（业务）数据相关矩阵的Cholesky分解来确定。 处理进一步包括将白化的介质信道估计转换为白化净信道估计，其考虑发射/接收滤波的影响。

公开(公告)号：US07912433B2

公开(公告)日：2011-03-22

申请号：US12750793

申请日：2010-03-31

Applicant: Karl Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

Inventor： Karl Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

IPC: H04B17/00

CPC classification number: H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

Abstract: A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

Abstract translation: 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。

公开(公告)号：US07848392B2

公开(公告)日：2010-12-07

申请号：US11957487

申请日：2007-12-17

Applicant: Cheng-Zong Bai ,  Hsueh-Jyh Li ,  Po-Ying Chen

Inventor： Cheng-Zong Bai ,  Hsueh-Jyh Li ,  Po-Ying Chen

IPC: H04B1/707

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

Abstract: The invention relates to a rake receiver and a method for de-spreading thereof. A plurality of noise branches is adopted for producing a plurality of noise components in the rake receiver. Next, a noise combining unit adjusts each noise component according to a plurality of noise weights, so as to combine the noise components to obtain an interference-plus-noise estimation value. The rake receiver eliminates the noises in the main signal generated by the signal branches through using the interference-plus-noise estimation value. Therefore, the performance of a receiving terminal can be enhanced.

Abstract translation: 本发明涉及一种耙式接收机及其解扩方法。 采用多个噪声分支来在耙式接收机中产生多个噪声分量。 接下来，噪声组合单元根据多个噪声权重来调整每个噪声分量，以便组合噪声分量以获得干扰加噪声估计值。 耙式接收器通过使用干扰加噪声估计值消除由信号分支产生的主信号中的噪声。 因此，可以提高接收终端的性能。

公开(公告)号：US07817604B2

公开(公告)日：2010-10-19

申请号：US11150913

申请日：2005-06-13

Applicant: Bengt Lindoff ,  Johan Nilsson

Inventor： Bengt Lindoff ,  Johan Nilsson

IPC: H04B7/216

CPC classification number: H04B17/382 ,  H04B17/26 ,  H04B17/373 ,  H04B2201/709727

Abstract: A detection strategy is selected for use in detecting a shared control channel that is transmitted on a physical channel in a communication system. This involves using a previously selected detection strategy to detect the shared control channel. The power of the detected shared control channel is measured. At least two correlation results are generated by correlating the measured power with each of at least two parameters that are associated with one or more other physical channels used in the communication system. Based on the at least two correlation results, a detection strategy is selected for upcoming use in detecting the shared control channel.

Abstract translation: 选择检测策略用于检测在通信系统中在物理信道上发送的共享控制信道。 这涉及使用先前选择的检测策略来检测共享控制信道。 测量检测到的共享控制信道的功率。 通过将所测量的功率与与在通信系统中使用的一个或多个其它物理信道相关联的至少两个参数中的每一个进行相关来生成至少两个相关结果。 基于至少两个相关结果，为检测共享控制信道的即将使用选择检测策略。

公开(公告)号：US20100183064A1

公开(公告)日：2010-07-22

申请号：US12750793

申请日：2010-03-31

Applicant: Karl James Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

Inventor： Karl James Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

IPC: H04B17/00

CPC classification number: H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

Abstract: A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

Abstract translation: 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。

公开(公告)号：US07697595B2

公开(公告)日：2010-04-13

申请号：US11432580

申请日：2006-05-11

Applicant: Vijay Nagarajan ,  Louis L Scharf ,  Anand P Narayan

Inventor： Vijay Nagarajan ,  Louis L Scharf ,  Anand P Narayan

IPC: H04B1/69

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：US20100074300A1

公开(公告)日：2010-03-25

申请号：US12447292

申请日：2006-10-27

Applicant: Ulf Lindgren

Inventor： Ulf Lindgren

IPC: H04B1/69 ,  H04L27/06

CPC classification number: H04L25/03993 ,  H04B1/7115 ,  H04B2201/709727 ,  H04L2025/03426

Abstract: A method for simplifying calculations for pre-whitening in a G-RAKE receiver, comprising receiving at least two signals with at least two antennas via a channel, where each one of said received signals comprises time delayed and attenuated versions of the original signals. Each received signal forms a corresponding vector of received signal versions and the vectors form a matrix of received signals, where, due to correlation between the antennas, the received signals are correlated. Each version also comprises a certain amount of colored noise. The correlating effect of the antennas is estimated and formulated in matrix form and used to acquire essentially uncorrelated received signal vectors in an essentially uncorrelated received signal matrix. A calculated inverse of a covariance matrix of the calculated essentially uncorrelated signal vectors is used to pre-whiten the noise. A G-RAKE receiver arranged for applying the method above.

Abstract translation: 一种用于简化G-RAKE接收机中的前白化计算的方法，包括经由信道至少接收至少两个天线的至少两个信号，其中每个所述接收信号包括原始信号的时间延迟和衰减版本。 每个接收的信号形成接收信号版本的对应矢量，并且矢量形成接收信号的矩阵，其中由于天线之间的相关性，接收信号相关。 每个版本还包含一定量的彩色噪音。 天线的相关效应被估计并以矩阵形式表示，并且用于在基本上不相关的接收信号矩阵中获取基本上不相关的接收信号向量。 使用计算出的基本上不相关的信号向量的协方差矩阵的计算逆来预处理噪声。 G-RAKE接收机被设置为应用上述方法。

公开(公告)号：US07668227B2

公开(公告)日：2010-02-23

申请号：US11443883

申请日：2006-05-31

Applicant: Stephen J. Grant ,  Jung-Fu Cheng ,  Leonid Krasny ,  Karl J. Molnar ,  Yi-Pin Eric Wang

Inventor： Stephen J. Grant ,  Jung-Fu Cheng ,  Leonid Krasny ,  Karl J. Molnar ,  Yi-Pin Eric Wang

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B1/7103 ,  H04B1/711 ,  H04B7/04 ,  H04B2201/709727

Abstract: A receiver reduces interference in a received symbol of interest attributable to an interfering symbol using knowledge of the symbol spreading codes. The receiver comprises a plurality of correlators generating despread values for the received symbol of interest and the interfering symbol, and a combiner to combine the despread values using combining weights calculated based on spreading code correlations between spreading codes for the received symbol of interest and the interfering symbol.

Abstract translation: 接收机使用符号扩展码的知识来减少归因于干扰符号的接收的感兴趣的符号中的干扰。 接收机包括多个相关器，用于产生所接收的感兴趣符号和干扰符号的解扩值，以及组合器，使用基于用于所接收的感兴趣符号的扩展码与干扰信号之间的扩展码相关性计算的组合权重组合去扩展值 符号。

公开(公告)号：US20090245330A1

公开(公告)日：2009-10-01

申请号：US12056035

申请日：2008-03-26

Applicant: Ali S. Khayrallah ,  Yi-Pin Eric Wang

Inventor： Ali S. Khayrallah ,  Yi-Pin Eric Wang

IPC: H04B1/707

CPC classification number: H04B1/712 ,  H04B2201/709727 ,  H04L1/0631 ,  H04L1/0643

Abstract: A Generalized Rake (G-Rake) receiver is adapted for Golden code reception in a CDMA system. Signals transmitted by two or more transmit antennas are received at two or more receiver antennas. The signal from each receiver antenna is despread, and channel estimation is performed for each transmit antenna. G-Rake combining weights are calculated based on impairment correlation across G-Rake fingers and channel coefficients corresponding to each transmit antenna. The despread values from each symbol period are combined over a plurality of symbol periods based on the combining weights. The combined values are processed using coefficients derived from the Golden number to generate a set of decision variables, and the Golden encoded symbols are jointly detected from the decision variables. In some embodiments, spherical decoding and triangularization significantly simplify the decoding problem formulation.

Abstract translation: 广义耙（G-Rake）接收机适用于CDMA系统中的黄金码接收。 由两个或多个发射天线发射的信号在两个或多个接收机天线处被接收。 来自每个接收机天线的信号被解扩展，并且对于每个发射天线执行信道估计。 基于G-Rake指针和对应于每个发射天线的信道系数的损伤相关计算G-Rake组合权重。 基于组合权重，从多个符号周期组合来自每个符号周期的解扩值。 使用从黄金数字导出的系数来处理组合值以生成一组决策变量，并且从决策变量共同检测到黄金编码符号。 在一些实施例中，球面解码和三角化显着简化了解码问题公式。

公开(公告)号：US07590167B2

公开(公告)日：2009-09-15

申请号：US11215584

申请日：2005-08-30

Applicant: Tracy L. Fulghum ,  Douglas A. Cairns

Inventor： Tracy L. Fulghum ,  Douglas A. Cairns

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: A wireless communication device includes a Generalized RAKE (G-RAKE) receiver circuit that is configured to determine a traffic-to-pilot gain scaling parameter as part of the impairment correlation determination process that underlies (G-RAKE) combining weight generation. In this manner, the receiver circuit conveniently and accurately accounts for gain differences between the pilot channel of a received CDMA signal, as used for channel estimation, and the traffic channel(s) of the CDMA signal, which carry received data to be recovered. The gain difference accounting enables proper demodulation of amplitude-modulated traffic signals. By way of non-limiting example, such gain scaling may be used for demodulating/decoding High Speed Downlink Packet Access (HSDPA) signals used in Wideband Code Division Multiple Access (W-CDMA) systems.

Abstract translation: 无线通信设备包括广义RAKE（G-RAKE）接收器电路，其被配置为确定作为组合权重生成（G-RAKE）的基础的损害相关确定过程的一部分的业务到引导增益缩放参数。 以这种方式，接收机电路方便且准确地考虑了用于信道估计的接收的CDMA信号的导频信道与携带接收的要恢复的数据的CDMA信号的业务信道之间的增益差。 增益差计算能够对幅度调制的交通信号进行适当的解调。 作为非限制性示例，这种增益缩放可以用于解调/解码在宽带码分多址（W-CDMA）系统中使用的高速下行链路分组接入（HSDPA）信号。