公开(公告)号：US08401487B2

公开(公告)日：2013-03-19

申请号：US12650201

申请日：2009-12-30

申请人： Paul W. Dent ,  Leonid Krasny

发明人： Paul W. Dent ,  Leonid Krasny

IPC分类号： H04B17/00

CPC分类号： H04L25/022 ,  H04L25/0222 ,  H04L25/0232

摘要： A receiver and receive processing method described herein improves the accuracy of channel estimates by correcting for the assumption that the Doppler shift (or rate-of-change-of-delay) stays constant for each frequency within a signal bandwidth of a received signal. To that end, a receiver according to the present invention comprises a channel processor having multiple processing units. A first processing unit processes reference values (e.g., pilot signals) received for each of a plurality of frequencies within a signal bandwidth at a plurality of different signal times (or the complex propagation channel coefficients estimated therefrom) to determine a set of complex wave amplitudes either for each of multiple frequencies in the signal bandwidth or for each of the different signal times. A second processing unit subsequently processes the complex wave amplitudes to determine complex scattering coefficients, where each complex scattering coefficient corresponds to a respective scattering object in the wireless communication channel.

摘要翻译： 本文描述的接收机和接收处理方法通过校正多普勒频移（或延迟变化率）在接收信号的信号带宽内对于每个频率保持恒定的假设来提高信道估计的精度。 为此，根据本发明的接收机包括具有多个处理单元的信道处理器。 第一处理单元处理在多个不同信号时间（或从其估计的复数传播信道系数）内在信号带宽内的多个频率中的每一个接收的参考值（例如，导频信号），以确定一组复波幅度 对于信号带宽中的多个频率中的每一个或针对不同信号时间的每一个， 第二处理单元随后处理复波幅度以确定复散射系数，其中每个复散射系数对应于无线通信信道中的相应散射物体。

公开(公告)号：US07197282B2

公开(公告)日：2007-03-27

申请号：US10135095

申请日：2002-04-30

申请人： Paul W. Dent ,  Kambiz C. Zangi ,  Leonid Krasny

发明人： Paul W. Dent ,  Kambiz C. Zangi ,  Leonid Krasny

IPC分类号： H04B17/00

CPC分类号： H04L27/367 ,  H04B1/7105 ,  H04B7/005 ,  H04B7/022 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0636 ,  H04L1/0003 ,  H04L1/16 ,  H04L25/0202 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/03343

摘要： Processing of loop-back information returned by one or more mobile stations that are served by a wireless communication network permits the network to compensate its transmit signals for increased transmission efficiency and reduced signal interference at the mobile stations. Generally, the network forms one or more transmit signals as a combination of different signals intended for the different mobile stations, and remembers transmit information associated with these transmit signals. The mobile stations return loop-back signals to the network, which determines transmit signal compensation information by comparing loop-back information to memorized information. The mobile stations may loop-back samples from composite received signals, from processed received signal samples, or loop-back estimates. In the first case, processing at the network involves compensating the combined transmit signals at the transmit modulation rate, while the second case involves symbol rate processing of the individual information streams intended for the different mobile stations.

摘要翻译： 由无线通信网络服务的一个或多个移动站返回的环回信息的处理允许网络补偿其发射信号，以增加传输效率并降低移动站处的信号干扰。 通常，网络形成作为不同移动站的不同信号的组合的一个或多个发射信号，并且记住发送与这些发射信号相关联的信息。 移动站向网络返回环回信号，通过将回送信息与存储信息进行比较来确定发送信号补偿信息。 移动台可以从复合接收信号，经过处理的接收信号样本或环回估计中回送样本。 在第一种情况下，网络处理涉及以发射调制速率补偿组合的发射信号，而第二种情况涉及针对不同移动台的各个信息流的符号速率处理。

公开(公告)号：US20110158361A1

公开(公告)日：2011-06-30

申请号：US12650201

申请日：2009-12-30

申请人： Paul W. Dent ,  Leonid Krasny

发明人： Paul W. Dent ,  Leonid Krasny

IPC分类号： H04B7/10

CPC分类号： H04L25/022 ,  H04L25/0222 ,  H04L25/0232

摘要： A receiver and receive processing method described herein improves the accuracy of channel estimates by correcting for the assumption that the Doppler shift (or rate-of-change-of-delay) stays constant for each frequency within a signal bandwidth of a received signal. To that end, a receiver according to the present invention comprises a channel processor having multiple processing units. A first processing unit processes reference values (e.g., pilot signals) received for each of a plurality of frequencies within a signal bandwidth at a plurality of different signal times (or the complex propagation channel coefficients estimated therefrom) to determine a set of complex wave amplitudes either for each of multiple frequencies in the signal bandwidth or for each of the different signal times. A second processing unit subsequently processes the complex wave amplitudes to determine complex scattering coefficients, where each complex scattering coefficient corresponds to a respective scattering object in the wireless communication channel.

摘要翻译： 本文描述的接收机和接收处理方法通过校正多普勒频移（或延迟变化率）在接收信号的信号带宽内对于每个频率保持恒定的假设来提高信道估计的精度。 为此，根据本发明的接收机包括具有多个处理单元的信道处理器。 第一处理单元处理在多个不同信号时间（或从其估计的复数传播信道系数）内在信号带宽内的多个频率中的每一个接收的参考值（例如，导频信号），以确定一组复波幅度 对于信号带宽中的多个频率中的每一个或针对不同信号时间的每一个， 第二处理单元随后处理复波幅度以确定复散射系数，其中每个复散射系数对应于无线通信信道中的相应散射物体。

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。

公开(公告)号：US07983623B2

公开(公告)日：2011-07-19

申请号：US12129918

申请日：2008-05-30

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.

摘要翻译： 在无线网络中，来自多个基站的多个下行链路信号被发送到终端。 多个下行链路信号都携带相同的信息给终端。 终端提供对下行链路信道的反馈。 反馈提供有关通道的抽头的信息。 反馈的信息量受到限制。 基于反馈，调整下行链路信号的传输参数。 发送，提供反馈和调整参数的过程继续进行，使得下行链路信号的能量在终端位置得到增强，并在其他地方被抑制。 波束形成可用于进一步抑制终端位置之外的位置处的能量特征。

公开(公告)号：US07912433B2

公开(公告)日：2011-03-22

申请号：US12750793

申请日：2010-03-31

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

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

IPC分类号： H04B17/00

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

摘要： 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.

摘要翻译： 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。