公开(公告)号：US08515435B2

公开(公告)日：2013-08-20

申请号：US11045877

申请日：2005-01-28

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

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

IPC分类号： H04W72/00

CPC分类号： H04B7/0686 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/065 ,  H04B7/0689 ,  H04B7/0691 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/003 ,  H04L1/06

摘要： An adaptive transmission scheme provides multiple levels of adaptation. At a first level, a selection is made between a limited feedback or limited feedback scheme and a rich feedback scheme. At a second level of adaptation, a diversity mode is selected. Additional levels of adaptation could be employed.

摘要翻译： 自适应传输方案提供多级适配。 在第一级，在有限反馈或有限反馈方案和丰富的反馈方案之间进行选择。 在第二级适配时，选择分集模式。 可以采用额外的适应水平。

公开(公告)号：US08199840B2

公开(公告)日：2012-06-12

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： H04B7/02

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：US20120058767A1

公开(公告)日：2012-03-08

申请号：US13292738

申请日：2011-11-09

申请人： Karl Molnar ,  Kambiz C. Zangi ,  Leonid Krasny ,  Stephen Grant ,  Jonas B. Karlsson

发明人： Karl Molnar ,  Kambiz C. Zangi ,  Leonid Krasny ,  Stephen Grant ,  Jonas B. Karlsson

IPC分类号： H04W74/04 ,  H04W36/00 ,  H04W72/04

CPC分类号： H04B7/0619 ,  H04B7/024 ,  H04B7/061 ,  H04B7/0639 ,  H04B7/0691 ,  H04B7/10 ,  H04W72/12 ,  H04W72/1278 ,  H04W88/02

摘要： A communication device is described herein that has control (or at least partial control) over which virtual antenna(s) in one or more base stations to use for transmissions. In one embodiment, the mobile phone performs the following steps: (1) receives an antenna subset list (from the scheduling unit) which identifies a configuration of virtual antennas that is associated with the base station(s); (2) uses the antenna subset list to select which virtual antenna(s) in the configuration of virtual antennas to use for transmissions; and (3) sends an antenna selection signal (to the scheduling unit) which contains information that instructs/requests the base station(s)/scheduling unit to use the selected virtual antenna(s) for transmissions.

摘要翻译： 本文描述的通信设备具有控制（或至少部分控制），一个或多个基站中的虚拟天线将用于传输。 在一个实施例中，移动电话执行以下步骤：（1）从识别与基站相关联的虚拟天线的配置接收来自调度单元的天线子集列表; （2）使用天线子集列表来选择用于传输的虚拟天线的配置中的哪些虚拟天线; 并且（3）发送包含指示/请求基站/调度单元使用所选择的虚拟天线进行传输的信息的天线选择信号（到调度单元）。

公开(公告)号：US07599702B2

公开(公告)日：2009-10-06

申请号：US10745051

申请日：2003-12-23

申请人： Karl James Molnar ,  Stephen James Grant ,  Leonid Krasny

发明人： Karl James Molnar ,  Stephen James Grant ,  Leonid Krasny

IPC分类号： H04W40/00

CPC分类号： H04W72/1231 ,  H04B2201/709727 ,  H04L1/20 ,  H04L5/0044 ,  H04L5/006 ,  H04W52/16 ,  H04W52/226 ,  H04W52/325 ,  H04W52/367

摘要： A base station schedules one of a plurality of mobile terminals based on an expected SIR of an effective traffic channel associated with a non-scheduled mobile terminal. The expected SIR is generated by computing the expected SIR of a hypothesized traffic channel with a pre-filter adapted to the non-scheduled mobile terminal that would result if the non-scheduled mobile terminal was scheduled. A base station then schedules transmissions to the plurality of mobile terminals based on the computed expected SIR. The expected SIR may be computed so as to compensate for mismatch between the hypothesized traffic channel and a pilot channel associated with the non-scheduled mobile terminal. Alternatively, the expected SIR may be directly computed based on an estimate of the pre-filter of the hypothesized traffic channel.

摘要翻译： 基站基于与非调度移动终端相关联的有效业务信道的期望SIR来调度多个移动终端中的一个。 通过利用适配于非调度移动终端的预滤波器来计算假设的业务信道的预期SIR来产生预期的SIR，如果非调度移动终端被调度，则将产生。 基站然后基于所计算的预期SIR调度到多个移动终端的传输。 可以计算期望的SIR，以补偿假设业务信道与与非调度移动终端相关联的导频信道之间的失配。 或者，可以基于假设的业务信道的前置过滤器的估计来直接计算预期的SIR。

公开(公告)号：US20080318613A1

公开(公告)日：2008-12-25

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： H04B7/005 ,  H04B7/26

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：US20080300004A1

公开(公告)日：2008-12-04

申请号：US11969002

申请日：2008-01-03

申请人： Kumar Balachandran ,  Leonid Krasny

发明人： Kumar Balachandran ,  Leonid Krasny

IPC分类号： H04Q7/22

CPC分类号： H04W52/267 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0617 ,  H04W24/02 ,  H04W52/146 ,  H04W52/241 ,  H04W52/34 ,  H04W72/0473

摘要： A base station maximizes a uplink data transmission rate from multiple mobiles treated by the base station as a virtual single uplink transmitter. The base station identifies a set of mobile stations as a candidate transmitting set and determines a transmit power allowable from the mobile stations in the candidate transmitting set. A subset of those mobile stations in the candidate transmitting set is identified. Uplink data transmission rates are assigned and communicated to the subset of mobile stations in the candidate transmitting set so as to optimize a total number of bits processed by the base station associated with the uplink transmissions received from the subset of candidate mobile stations. The optimization may accomplish one or more objectives in addition to optimizing the total number of bits processed.

摘要翻译： 基站使由基站处理的多个移动台的上行链路数据传输速率最大化为虚拟单个上行链路发射机。 基站将一组移动站识别为候选发送集合，并确定候选发送集合中的移动台允许的发送功率。 识别候选发送集合中的那些移动站的子集。 分配上行链路数据传输速率并将其传送到候选发送集合中的移动站的子集，以便优化与从候选移动站的子集接收到的上行链路传输相关联的基站处理的比特的总数。 除了优化处理的总位数之外，优化可以实现一个或多个目标。

公开(公告)号：US07376192B2

公开(公告)日：2008-05-20

申请号：US10897250

申请日：2004-07-22

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Leonid Krasny

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Leonid Krasny

IPC分类号： H04L27/00

CPC分类号： H04B7/0626 ,  H04B7/0641 ,  H04L25/0214 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03802

摘要： A method is described herein for reducing the number of feedback bits needed to send channel state information over a feedback channel from a receiving unit (e.g., mobile terminal, base station) to a transmitter unit (e.g., base station, mobile terminal) in a wireless communication system. In the embodiment, the receiver unit is capable of performing the following steps: (1) receiving a pilot signal from a transmit antenna located at a transmitter unit; (2) analyzing a channel tap associated with the transmit antenna and exploiting the temporal correlations of the channel tap to generate the following (i) a delta-modulated feedback bit indicative of a real part of a complex coefficient of the channel tap associated with the transmit antenna and (ii) a delta-modulated feedback bit indicative of an imaginary part of the complex coefficient of the channel tap associated with the transmit antenna; and (3) sending the two feedback bits over a feedback channel to the transmitter unit which analyzes the two feedback bits, and other feedback bits corresponding to other channel taps of this and other transmit antennas, to optimize the subsequent transmission of data to the receiver unit.

摘要翻译： 本文描述了一种用于减少在反馈信道上从在接收单元（例如，移动终端，基站）到发射机单元（例如，基站，移动终端）中的发送单元（例如，基站，移动终端）发送信道状态信息所需的反馈比特数的方法 无线通信系统。 在实施例中，接收机单元能够执行以下步骤：（1）从位于发射机单元的发射天线接收导频信号; （2）分析与发射天线相关联的信道抽头并利用信道抽头的时间相关性来生成以下（i）增量调制反馈比特，其表示与该信道抽头相关联的信道抽头的复系数的实部 发射天线和（ii）指示与发射天线相关联的信道分支的复系数的虚部的Δ调制反馈比特; 和（3）通过反馈信道将两个反馈比特发送到分析两个反馈比特的发射机单元以及对应于该和其它发射天线的其它信道抽头的其它反馈比特，以优化随后向接收机发送数据 单元。

公开(公告)号：US06738481B2

公开(公告)日：2004-05-18

申请号：US09757962

申请日：2001-01-10

申请人： Leonid Krasny ,  Ali S. Khayrallah

发明人： Leonid Krasny ,  Ali S. Khayrallah

IPC分类号： H04B1500

CPC分类号： G10L21/0208 ,  G10L2021/02166

摘要： A method and noise reduction apparatus comprises a microphone array including a plurality of microphone elements for receiving a training signal including a plurality of training signal samples, and a working signal including a plurality of working signal samples, and at least one frequency domain convertor coupled to the plurality of microphone elements for converting the plurality of training signal samples and the plurality of working signal samples to the frequency domain. A signal spatial correlation matrix estimator is coupled to the at least one frequency domain convertor for estimating a signal spatial correlation matrix using the converted plurality of training signal samples. An inverse noise spatial correlation matrix estimator is coupled to the at least one frequency domain convertor for estimating an inverse noise spatial correlation matrix using the converted plurality of working signal samples. A constrained output generator is coupled to the at least one frequency domain convertor, the signal spatial correlation matrix estimator and the inverse noise spatial correlation matrix estimator for generating a constrained output for the noise reduction apparatus using the converted working signal samples, the estimated signal spatial correlation matrix and the estimated inverse noise spatial correlation matrix.

摘要翻译： 一种方法和降噪装置包括麦克风阵列，其包括多个麦克风元件，用于接收包括多个训练信号样本的训练信号，以及包括多个工作信号采样的工作信号，以及至少一个频域转换器， 所述多个麦克风元件用于将所述多个训练信号样本和所述多个工作信号样本转换成所述频域。 信号空间相关矩阵估计器耦合到所述至少一个频域转换器，用于使用所转换的多个训练信号采样来估计信号空间相关矩阵。 反相噪声空间相关矩阵估计器被耦合到所述至少一个频域转换器，用于使用所转换的多个工作信号采样来估计逆噪声空间相关矩阵。 约束输出发生器耦合到至少一个频域转换器，信号空间相关矩阵估计器和反相噪声空间相关矩阵估计器，用于使用转换的工作信号采样来生成用于降噪装置的约束输出，估计信号空间 相关矩阵和估计的反噪声空间相关矩阵。

公开(公告)号：US09049670B2

公开(公告)日：2015-06-02

申请号：US11969002

申请日：2008-01-03

申请人： Kumar Balachandran ,  Leonid Krasny

发明人： Kumar Balachandran ,  Leonid Krasny

IPC分类号： H04B7/00 ,  H04W52/26 ,  H04W52/14 ,  H04W52/34 ,  H04B7/06 ,  H04W52/24

CPC分类号： H04W52/267 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0617 ,  H04W24/02 ,  H04W52/146 ,  H04W52/241 ,  H04W52/34 ,  H04W72/0473

摘要： A base station maximizes an uplink data transmission rate from multiple mobiles treated by the base station as a virtual single uplink transmitter. The base station identifies a set of mobile stations as a candidate transmitting set and determines a transmit power allowable from the mobile stations in the candidate transmitting set. A subset of those mobile stations in the candidate transmitting set is identified. Uplink data transmission rates are assigned and communicated to the subset of mobile stations in the candidate transmitting set so as to optimize a total number of bits processed by the base station associated with the uplink transmissions received from the subset of candidate mobile stations. The optimization may accomplish one or more objectives in addition to optimizing the total number of bits processed.

摘要翻译： 基站将基站处理的多个移动台的上行链路数据传输速率最大化为虚拟单个上行链路发射机。 基站将一组移动站识别为候选发送集合，并确定候选发送集合中的移动台允许的发送功率。 识别候选发送集合中的那些移动站的子集。 分配上行链路数据传输速率并将其传送到候选发送集合中的移动站的子集，以便优化与从候选移动站的子集接收到的上行链路传输相关联的基站处理的比特的总数。 除了优化处理的总位数之外，优化可以实现一个或多个目标。

公开(公告)号：US08379782B2

公开(公告)日：2013-02-19

申请号：US12478473

申请日：2009-06-04

申请人： Paul Wilkinson Dent ,  Leonid Krasny

发明人： Paul Wilkinson Dent ,  Leonid Krasny

IPC分类号： H04B1/10

CPC分类号： H04L25/0202

摘要： The described method characterizes scattering objects in a wireless channel. The present invention determines non-equally spaced path delays and Doppler parameters for a plurality of scattering objects in a wireless channel. More particularly, a frequency-to-time transform applied to a plurality of OFDM pilot samples received over a plurality of OFDM symbol periods generates a set of non-equally spaced path delays and a set of associated complex delay coefficients. Further, a time-to-frequency transform applied to the complex delay coefficients determined for one path delay over multiple OFDM symbol periods generates a set of Doppler parameters comprising a plurality of non-equally spaced Doppler frequencies and their corresponding scattering coefficients for that path delay.

摘要翻译： 所描述的方法表征无线信道中的散射物体。 本发明为无线信道中的多个散射物体确定不等间距的路径延迟和多普勒参数。 更具体地，应用于在多个OFDM符号周期中接收的多个OFDM导频样本的频率 - 时间变换产生一组不等间距的路径延迟和一组相关联的复延迟系数。 此外，应用于针对多个OFDM符号周期上的一个路径延迟确定的复数延迟系数的时间 - 频率变换产生一组多普勒参数，其包括多个非等距多普勒频率及其对于该路径延迟的相应散射系数 。