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：US08923148B2

公开(公告)日：2014-12-30

申请号：US13439759

申请日：2012-04-04

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

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

IPC分类号： H04L12/26 ,  H04B7/02 ,  H04L1/20 ,  H04B17/00 ,  H04L25/02 ,  H04L1/00 ,  H04B7/06

CPC分类号： H04B17/0047 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/336 ,  H04B17/364 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224

摘要： A UE in a wireless communication network transmits succinct, direct channel state information to the network, enabling coordinated multipoint calculations such as joint processing, without substantially increasing uplink overhead. The UE receives and processes reference symbols over a set of non-uniformly spaced sub-carriers, selected according to a scheme synchronized to the network. The frequency response for each selected sub-carrier is estimated conventionally, and the results quantized and transmitted to the network on an uplink control channel. The non-uniform sub-carrier selection may be synchronized to the network in a variety of ways.

摘要翻译： 无线通信网络中的UE向网络发送简洁的直接信道状态信息，实现诸如联合处理之类的协调多点计算，而基本上不增加上行链路开销。 UE根据与网络同步的方案选择的一组非均匀间隔的子载波上接收和处理参考符号。 对于每个选择的子载波的频率响应是常规估计的，并且在上行链路控制信道上量化并传输到网络。 非均匀子载波选择可以以各种方式与网络同步。

公开(公告)号：US08660597B2

公开(公告)日：2014-02-25

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： H04B15/00 ,  H04B7/02

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：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 。

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：US20120188972A1

公开(公告)日：2012-07-26

申请号：US13439759

申请日：2012-04-04

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

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

IPC分类号： H04W72/04

CPC分类号： H04B17/0047 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/336 ,  H04B17/364 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224

摘要： A UE in a wireless communication network transmits succinct, direct channel state information to the network, enabling coordinated multipoint calculations such as joint processing, without substantially increasing uplink overhead. The UE receives and processes reference symbols over a set of non-uniformly spaced sub-carriers, selected according to a scheme synchronized to the network. The frequency response for each selected sub-carrier is estimated conventionally, and the results quantized and transmitted to the network on an uplink control channel. The non-uniform sub-carrier selection may be synchronized to the network in a variety of ways.

摘要翻译： 无线通信网络中的UE向网络发送简洁的直接信道状态信息，实现诸如联合处理之类的协调多点计算，而基本上不增加上行链路开销。 UE根据与网络同步的方案选择的一组非均匀间隔的子载波上接收和处理参考符号。 对于每个选择的子载波的频率响应是常规估计的，并且在上行链路控制信道上量化并传输到网络。 非均匀子载波选择可以以各种方式与网络同步。

公开(公告)号：US20120115427A1

公开(公告)日：2012-05-10

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： H04B17/00

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，用于减少与发射机反馈的发射信道相关矩阵TX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来重建发射信道相关矩阵＆phgr。TX。