公开(公告)号：US08170131B2

公开(公告)日：2012-05-01

申请号：US12281963

申请日：2006-03-07

申请人： Jiann-Ching Guey ,  Leonid Krasny

发明人： Jiann-Ching Guey ,  Leonid Krasny

IPC分类号： H04B7/02

CPC分类号： H04L1/0693 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0615 ,  H04L25/0206 ,  H04L25/0248

摘要： The present invention relates to a method and arrangement for reducing feedback data in a communication system, said communication system comprising a number of transmitter antennas, nτ, and a number of receiver antennas, nR, for parallel spatially independent transmission and reception of signals, wherein a channel response is represented by a matrix (G) containing nR×nτ complex variables. The method comprises the steps of: decomposing an expression of said channel response matrix (G) into products of a unitary transform (V), nR×nT diagonal matrix (Λ) and a conjugate transpose of a unitary matrix (W). Choosing said unitary matrix (W) such that its diagonal elements are real, substituting said channel response matrix (G) with a representative subset of elements in said decomposed expression of said channel response matrix (G), said representative subset comprising diagonal of a first matrix (Λ) and lower triangle of a second matrix (W) excluding the diagonal.

摘要翻译： 本发明涉及用于减少通信系统中的反馈数据的方法和装置，所述通信系统包括多个发射机天线nτ和多个用于并行的空间独立的信号发射和接收的接收天线nR，其中 信道响应由包含nR×nτ个复数变量的矩阵（G）表示。 该方法包括以下步骤：将所述信道响应矩阵（G）的表达式分解为单一变换（V），nR×nT对角矩阵（Λ）和酉矩阵（W）的共轭转置的乘积。 用所述信道响应矩阵（G）的所述分解表达式中的元素的代表性子集替换所述信道响应矩阵（G），选择所述酉矩阵（W）使其对角元素是实数，所述代表子集包括第一 矩阵（Λ）和除对角线之外的第二矩阵（W）的下三角形。

公开(公告)号：US07313110B2

公开(公告)日：2007-12-25

申请号：US10267223

申请日：2002-10-09

申请人： Jiann-Ching Guey ,  Leonid Krasny

发明人： Jiann-Ching Guey ,  Leonid Krasny

IPC分类号： H04Q7/00 ,  H04J3/16

CPC分类号： H04W28/22 ,  H04W72/0413

摘要： Bandwidth is allocated in a radio packet data system by sending achievable data rate estimate information from an access terminal to an access network. The achievable data rate estimate information is associated with scenarios corresponding to state combinations of a plurality of transmitters in the access network in which each transmitter is in either a serving, active, or idle state and one or more of the plurality of transmitters is in the idle state in one or more of the scenarios.

摘要翻译： 通过将可实现的数据速率估计信息从接入终端发送到接入网络，在无线分组数据系统中分配带宽。 可实现的数据速率估计信息与在接入网络中的多个发射机的状态组合相对应的情况相关联，其中每个发射机处于服务，主动或空闲状态，并且多个发射机中的一个或多个处于 一个或多个情景中的空闲状态。

公开(公告)号：US20090233559A1

公开(公告)日：2009-09-17

申请号：US12281963

申请日：2006-03-07

申请人： Jiann-Ching Guey ,  Leonid Krasny

发明人： Jiann-Ching Guey ,  Leonid Krasny

IPC分类号： H04B7/02

CPC分类号： H04L1/0693 ,  H04B7/0413 ,  H04B7/0417 ,  H04B7/0615 ,  H04L25/0206 ,  H04L25/0248

摘要： The present invention relates to a method and arrangement for reducing feedback data in a communication system, said communication system comprising a number of transmitter antennas, nτ, and a number of receiver antennas, nR, for parallel spatially independent transmission and reception of signals, wherein a channel response is represented by a matrix (G) containing nR×nτ complex variables. The method comprises the steps of: decomposing an expression of said channel response matrix (G) into products of a unitary transform (V), nR×nτ diagonal matrix (Λ) and a conjugate transpose of a unitary matrix (W). Choosing said unitary matrix (W) such that its diagonal elements are real, substituting said channel response matrix (G) with a representative subset of elements in said decomposed expression of said channel response matrix (G), said representative subset comprising diagonal of a first matrix (Λ) and lower triangle of a second matrix (W) excluding the diagonal.

摘要翻译： 本发明涉及一种用于减少通信系统中的反馈数据的方法和装置，所述通信系统包括多个发射机天线，ntau和多个用于并行空间独立的信号发射和接收的接收机天线nR，其中 通道响应由包含nRxntau复变量的矩阵（G）表示。 该方法包括以下步骤：将所述信道响应矩阵（G）的表达式分解为酉变换（V），nRxntau对角矩阵（λ）和酉矩阵（W）的共轭转置的乘积。 用所述信道响应矩阵（G）的所述分解表达式中的元素的代表性子集替换所述信道响应矩阵（G），选择所述酉矩阵（W）使其对角元素是实数，所述代表子集包括第一 矩阵（Lambda）和除对角线之外的第二矩阵（W）的下三角形。

公开(公告)号：US08379773B2

公开(公告)日：2013-02-19

申请号：US12489924

申请日：2009-06-23

申请人： Leonid Krasny ,  Jiann-Ching Guey

发明人： Leonid Krasny ,  Jiann-Ching Guey

IPC分类号： H04L27/06

CPC分类号： H04L25/0232 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0218 ,  H04L25/022 ,  H04L25/024

摘要： A method and apparatus for channel estimation based on extracting channel information, including noise spectral density, from a received signal, and advantageously exploiting that information for improved channel estimation accuracy. One embodiment is directed to a method of generating channel estimates in a wireless communication receiver, for processing a received communication signal. The method includes generating first channel estimates from a set of pilot observations obtained from the received communication signal, using a first channel estimation process that is not dependent on knowledge of channel statistics. The method further includes estimating channel statistics and a noise variance from the first channel estimates, and generating second channel estimates from the set of pilot observations, the estimated channel statistics, and the estimated noise variance, using a second channel estimation process that is dependent on knowledge of the channel statistics.

摘要翻译： 一种用于信道估计的方法和装置，其基于从接收信号中提取包括噪声频谱密度的信道信息，并且有利地利用该信息以改善信道估计精度。 一个实施例涉及在无线通信接收机中产生信道估计的方法，用于处理接收到的通信信号。 该方法包括使用不依赖于信道统计知识的第一信道估计过程从从所接收的通信信号获得的一组导频观测中产生第一信道估计。 该方法还包括从第一信道估计估计信道统计和噪声方差，以及使用依赖于第二信道估计过程的第二信道估计过程从所述导频观测集合，所估计的信道统计信息和估计的噪声方差产生第二信道估计 渠道统计知识。

公开(公告)号：US20100322357A1

公开(公告)日：2010-12-23

申请号：US12489924

申请日：2009-06-23

申请人： Leonid Krasny ,  Jiann-Ching Guey

发明人： Leonid Krasny ,  Jiann-Ching Guey

IPC分类号： H04L27/06 ,  H04B1/10

CPC分类号： H04L25/0232 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0218 ,  H04L25/022 ,  H04L25/024

摘要： A method and apparatus for channel estimation based on extracting channel information, including noise spectral density, from a received signal, and advantageously exploiting that information for improved channel estimation accuracy. One embodiment is directed to a method of generating channel estimates in a wireless communication receiver, for processing a received communication signal. The method includes generating first channel estimates from a set of pilot observations obtained from the received communication signal, using a first channel estimation process that is not dependent on knowledge of channel statistics. The method further includes estimating channel statistics and a noise variance from the first channel estimates, and generating second channel estimates from the set of pilot observations, the estimated channel statistics, and the estimated noise variance, using a second channel estimation process that is dependent on knowledge of the channel statistics.

摘要翻译： 一种用于信道估计的方法和装置，其基于从接收信号中提取包括噪声频谱密度的信道信息，并且有利地利用该信息以改善信道估计精度。 一个实施例涉及在无线通信接收机中产生信道估计的方法，用于处理接收到的通信信号。 该方法包括使用不依赖于信道统计知识的第一信道估计过程从从所接收的通信信号获得的一组导频观测中产生第一信道估计。 该方法还包括从第一信道估计估计信道统计和噪声方差，以及使用依赖于第二信道估计过程的第二信道估计过程从所述导频观测集合，所估计的信道统计信息和估计的噪声方差产生第二信道估计 渠道统计知识。

公开(公告)号：US08670497B2

公开(公告)日：2014-03-11

申请号：US13253412

申请日：2011-10-05

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

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

IPC分类号： H04B7/02

CPC分类号： H04B1/712 ,  H04B1/7103 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/7107 ,  H04B1/71072 ,  H04B7/04 ,  H04B7/0684 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0048 ,  H04L1/18 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/03012 ,  H04L25/03318 ,  H04L25/03331 ,  H04W52/16 ,  H04W52/325 ,  H04W52/346 ,  H04W52/42

摘要： A wireless communication receiver improves signal impairment correlation estimation in MIMO/MISO systems by considering different transmit power allocations and different transmit antenna power distributions in its impairment correlation calculations. The receiver may be implemented in according to a variety of architectures, including, but not limited to, Successive Interference Cancellation (SIC) Generalized RAKE (G-RAKE), Joint Detection (JD) G-RAKE, and Minimum Mean Squared Error (MMSE) G-RAKE. Regardless of the particular receiver architecture adopted, the improved impairment correlations may be used to calculate improved (RAKE) signal combining weights and/or improve channel quality estimates for reporting by receivers operating in Wideband CDMA (W-CDMA) systems transmitting HSDPA channels via MIMO or MISO transmitters. A transmitter may be configured to facilitate impairment correlation determinations by wireless communication receivers operating in MIMO/MISO environments, by signaling one or more values, e.g., data-to-pilot signal transmit power ratios and/or transmit antenna power distributions for the data and pilot signals.

摘要翻译： 无线通信接收机通过在损伤相关计算中考虑不同的发射功率分配和不同的发射天线功率分布来改善MIMO / MISO系统中的信号损害相关估计。 接收机可以根据各种架构来实现，包括但不限于连续干扰消除（SIC）广义RAKE（G-RAKE），联合检测（JD）G-RAKE和最小均方误差（MMSE） ）G-RAKE。 不考虑所采用的特定接收机架构，改进的损害相关可以用于计算改进的（RAKE）信号组合权重和/或改善用于在通过MIMO发送HSDPA信道的宽带CDMA（W-CDMA）系统中操作的接收机报告的信道质量估计 或MISO发射机。 发射机可以被配置为通过信令一个或多个值（例如数据到导频信号发射功率比和/或数据的发射天线功率分布）来促进在MIMO / MISO环境中操作的无线通信接收机的损害相关确定，以及 导频信号。

公开(公告)号：US08526891B2

公开(公告)日：2013-09-03

申请号：US13162044

申请日：2011-06-16

申请人： Kumar Balachandran ,  Leonid Krasny

发明人： Kumar Balachandran ,  Leonid Krasny

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04B7/024 ,  H04B7/022 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0663 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0693 ,  H04L25/0216 ,  H04L25/03343 ,  H04W16/28 ,  H04W28/18 ,  H04W52/143 ,  H04W52/367 ,  H04W52/40 ,  H04W92/20

摘要： In a wireless network, plural downlink signals from plural base stations are transmitted to a terminal. The plural downlink signals all carry the same information to the terminal. The terminal provides feedback on the downlink channels. The feedback provides information on the taps of the channels. The amount of information fed back is constrained. Based on the feedback, transmission parameters of the downlink signals are adjusted. The process of transmitting, providing feedback, and adjusting the parameters continue so that the energy of the downlink signal is enhanced at the terminal location and suppressed elsewhere. Beam forming can be used to further suppress the energy signature at locations other than the terminal location.

公开(公告)号：US08442449B2

公开(公告)日：2013-05-14

申请号：US12941114

申请日：2010-11-08

申请人： Dennis Hui ,  Jung-Fu Cheng ,  Kambiz Zangi ,  Leonid Krasny

发明人： Dennis Hui ,  Jung-Fu Cheng ,  Kambiz Zangi ,  Leonid Krasny

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04B7/0417 ,  H04B7/065 ,  H04B7/0658 ,  H04B7/066 ,  H04B7/0663

摘要： A receiver and a method are described herein for reducing an amount of channel state information related to a transmit channel correlation matrix ΦTX that is feedback to a transmitter. In addition, to a transmitter and a method are described herein for reconstructing the transmit channel correlation matrix φTX using the reduced channel state feedback information received from the receiver.

摘要翻译： 本文描述了一种接收机和方法，用于减少与向发射机反馈的发射信道相关矩阵PhiTX相关的信道状态信息量。 此外，本文描述了一种发射机和方法，用于使用从接收机接收的减少的信道状态反馈信息重建发射信道相关矩阵phiTX。

公开(公告)号：US20120114060A1

公开(公告)日：2012-05-10

申请号：US11740417

申请日：2007-04-26

申请人： Kambiz C. Zangi ,  Leonid Krasny

发明人： Kambiz C. Zangi ,  Leonid Krasny

IPC分类号： H04B15/00 ,  H04L25/03

CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/0634 ,  H04B7/0691

摘要： In MIMO systems, two or more transmit signals are transmitted from different antenna clusters having one or more transmit antennas each. A precoding circuit weight the transmit signals transmitted from each transmit antenna using a common set of frequency independent antenna weights for all antenna clusters. The antenna weights are computed based on correlations between transmit antennas in the same antenna cluster.

摘要翻译： 在MIMO系统中，从具有一个或多个发射天线的不同天线簇发射两个或更多个发射信号。 预编码电路使用对于所有天线簇的共用的一组独立于频率的天线权重对从每个发射天线发射的发射信号进行加权。 基于相同天线簇中的发射天线之间的相关性来计算天线权重。

公开(公告)号：US20120100877A1

公开(公告)日：2012-04-26

申请号：US13335482

申请日：2011-12-22

申请人： Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

发明人： Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

IPC分类号： H04W24/02

CPC分类号： H04B7/024

摘要： A method for determining antenna weights for use in transmitting data from a plurality of base stations to a user device is disclosed. The antenna weights are determined using an input covariance matrix (S), and the input covariance matrix is determined subject to a predetermined power constraint and a predetermined, non-zero interference constraint.

摘要翻译： 公开了一种用于确定用于从多个基站向用户设备发送数据的天线权重的方法。 使用输入协方差矩阵（S）确定天线权重，并且在预定功率约束和预定的非零干扰约束条件下确定输入协方差矩阵。