公开(公告)号：US20100234053A1

公开(公告)日：2010-09-16

申请号：US12404773

申请日：2009-03-16

Applicant: Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

Inventor： Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

IPC: H04B7/005 ,  H04B15/00

CPC classification number: H04B7/024

Abstract: 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.

Abstract translation: 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：US20100136940A1

公开(公告)日：2010-06-03

申请号：US11993507

申请日：2005-06-24

Applicant: Dennis Hui ,  Abdulrauf Hafeez

Inventor： Dennis Hui ,  Abdulrauf Hafeez

IPC: H04B1/10

CPC classification number: H04L25/0204 ,  H04L7/041 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/0244 ,  H04L25/03993

Abstract: A system and method in a radio receiver for joint synchronization and noise covariance estimation of a received signal. A spatially and temporally stacked signal model, whereby successive samples of temporally adjacent received signal vectors and corresponding training vectors are stacked, is used in the derivation of the estimation problem. The Toeplitz structure of the channel response matrix is neglected in the formulation of the estimation problem. The resulting estimator jointly estimates a synchronization position, a channel response matrix, and a noise covariance matrix. An estimate of a whitened channel is then computed based on the noise covariance matrix and the estimate of the channel response matrix.

Abstract translation: 用于接收信号的联合同步和噪声协方差估计的无线电接收机中的系统和方法。 空间和时间叠加的信号模型，其中叠加时间上相邻的接收信号矢量和对应的训练矢量的连续样本，用于推导估计问题。 通道响应矩阵的Toeplitz结构在估计问题的描述中被忽略。 所得到的估计器共同估计同步位置，信道响应矩阵和噪声协方差矩阵。 然后，基于噪声协方差矩阵和信道响应矩阵的估计来计算白化信道的估计。

公开(公告)号：US20100128683A1

公开(公告)日：2010-05-27

申请号：US12324073

申请日：2008-11-26

Applicant: Kambiz Zangi ,  Erik Dahlman ,  Dennis Hui

Inventor： Kambiz Zangi ,  Erik Dahlman ,  Dennis Hui

IPC: H04J11/00 ,  H04W72/04

CPC classification number: H04L5/0051 ,  H04L5/0007 ,  H04L5/0062 ,  H04L25/0202

Abstract: The present invention provides a method of generating mutually orthogonal reference signals for different user terminals in and OFDM system that span different but overlapping subcarriers. The subcarriers allocated to the user terminals are divided into a plurality of non-overlapping subcarrier blocks. Each user terminal is then allocated one or more subcarrier blocks. For each subcarrier block, a user terminal is assigned a reference signal comprising a base reference sequence and a linear phase rotation. To ensure mutual orthogonality among all user terminals, user terminals allocated the same subcarrier block use the same base reference sequence with different linear phase rotations.

Abstract translation: 本发明提供了一种对跨越不同但重叠的子载波的不同用户终端和OFDM系统生成相互正交参考信号的方法。 分配给用户终端的副载波被划分成多个不重叠的副载波块。 然后，每个用户终端被分配一个或多个子载波块。 对于每个子载波块，向用户终端分配包括基本参考序列和线性相位旋转的参考信号。 为了确保所有用户终端之间的相互正交性，分配相同子载波块的用户终端使用具有不同线性相位旋转的相同的基准参考序列。

公开(公告)号：US07720164B2

公开(公告)日：2010-05-18

申请号：US11678946

申请日：2007-02-26

Applicant: Rajaram Ramesh ,  Dennis Hui

Inventor： Rajaram Ramesh ,  Dennis Hui

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04L5/0007 ,  H04L5/0048 ,  H04L5/0058

Abstract: Transmission scheme for the uplink of FDMA systems that improves performance in an interference-dominated system by using a pilot scheme that provides enough information so that channel estimates can be obtained for a particular user, but which at the same time makes it possible to use pilot patterns that are different in different cells so that co-channel interference is mitigated. A codeword is used to position a set of pilot symbols within a set of subcarriers wherein each subcarrier has a first pilot time slot and a second pilot time slot associated with one or more data time slots. The set of subcarriers are identified on which to transmit the composite signal and the first pilot time slots and the second pilot time slots are filled with the pilot symbols in accordance with the codeword. The composite signal is then formatted as a combination of modulated data and pilot signals.

Abstract translation: 用于通过使用提供足够信息的导频方案来改善以干扰为主的系统中的性能的FDMA系统的上行链路的传输方案，以便可以为特定用户获得信道估计，但同时使得可以使用导频 在不同的小区中不同的模式，从而减轻了同信道干扰。 码字用于将一组导频符号定位在一组子载波中，其中每个子载波具有与一个或多个数据时隙相关联的第一导频时隙和第二导频时隙。 识别发射复合信号的子载波集合，并且根据码字对导频符号填充第一导频时隙和第二导频时隙。 然后将复合信号格式化为调制数据和导频信号的组合。

公开(公告)号：US07623596B2

公开(公告)日：2009-11-24

申请号：US10608274

申请日：2003-06-27

Applicant: Leonid Krasny ,  Dennis Hui

Inventor： Leonid Krasny ,  Dennis Hui

IPC: H04L27/06

CPC classification number: H04L25/0212 ,  H04L25/0226 ,  H04L25/0248

Abstract: A channel response may be estimated from training symbols that are received over a channel, by determining an initial channel estimate from the training symbols and applying bias to the initial channel estimate to obtain a biased channel estimate. The biased channel estimate may then be used to demodulate a signal that is received over the channel.

Abstract translation: 可以通过从训练符号确定初始信道估计并将偏差应用于初始信道估计以获得偏置信道估计，从​​通过信道接收的训练符号估计信道响应。 然后可以使用偏置信道估计来解调通过信道接收的信号。

公开(公告)号：US07088978B2

公开(公告)日：2006-08-08

申请号：US10360032

申请日：2003-02-07

Applicant: Dennis Hui ,  Rajaram Ramesh

Inventor： Dennis Hui ,  Rajaram Ramesh

IPC: H04B11/10

CPC classification number: H04L25/023 ,  H04L25/025 ,  H04L2025/03401 ,  H04L2025/03407

Abstract: A communication receiver improves its channel estimation performance, its equalization performance, or both, by modeling the non-Gaussian characteristics of a dominant source of interference in a received signal. That is, rather than using Gaussian-based modeling, the receiver generates signal disturbance estimates using a probabilistic model representative of the non-Gaussian interference in a received signal, such as adjacent channel or co-channel signal interference in mobile station operating within a wireless communication network. The receiver may use such non-Gaussian interference modeling responsive to detecting such interference in the received signal and may match its disturbance model to the detected interference. Further, where signal disturbance is predominantly Gaussian in nature, the receiver may switch to a Gaussian disturbance model.

Abstract translation: 通信接收机通过对接收信号中的主要干扰源的非高斯特性进行建模来提高其信道估计性能，均衡性能或两者。 也就是说，接收机不是使用基于高斯的建模，而是使用代表接收信号中的非高斯干扰的概率模型来产生信号干扰估计，例如在无线电中操作的移动站中的相邻信道或同频道信号干扰 通讯网络 接收机可以响应于在接收到的信号中检测到这样的干扰而使用这种非高斯干扰建模，并且可以将其干扰模型与检测到的干扰相匹配。 此外，在本质上信号干扰主要是高斯的情况下，接收机可以切换到高斯干扰模型。

公开(公告)号：US06775322B1

公开(公告)日：2004-08-10

申请号：US09638718

申请日：2000-08-14

Applicant: Kambiz C. Zangi ,  Raymond Toy ,  Dennis Hui

Inventor： Kambiz C. Zangi ,  Raymond Toy ,  Dennis Hui

IPC: H03H730

CPC classification number: H04L25/03057 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03605

Abstract: A computationally efficient method for computing the filter coefficients for a prefilter in a decision feedback equalizer solves linear equations using a fast Toeplitz algorithm. Computations performed to compute the filter coefficients for the right half burst may be used to compute the prefilter for the left hand burst, thereby reducing the number of computations. Also, a square root-free algorithm may be used to solve the system of linear equations, further reducing computational complexity.

Abstract translation: 在计算效率高的方法中，用于在判决反馈均衡器中计算预滤波器的滤波器系数，使用快速Toeplitz算法求解线性方程。 用于计算右半脉冲串的滤波器系数的计算可用于计算左手脉冲串的前置滤波器，从而减少计算次数。 此外，可以使用无平方根算法来解决线性方程组，进一步降低计算复杂度。

公开(公告)号：US06711124B2

公开(公告)日：2004-03-23

申请号：US09866241

申请日：2001-05-25

Applicant: Ali S. Khayrallah ,  Dennis Hui

Inventor： Ali S. Khayrallah ,  Dennis Hui

IPC: H04Q700

CPC classification number: H04L25/0242 ,  H04B7/0615 ,  H04B7/0845 ,  H04L25/0204 ,  H04L25/0226

Abstract: A wireless communication system with transmit diversity scales a training sequence simultaneously transmitted by two or more antennas over two or more time intervals in a manner that allows a receiver to perform channel estimation relative to each antenna. The transmit signal is scaled at each antenna in each time interval by a corresponding scaling value selected from a set of orthogonal scaling values. The receiver develops a channel estimate for each of the time intervals as if there were only one antenna transmitting the training sequence. These channel estimates are then summed or combined for each transmit antenna, using values from the corresponding scaling value matrix column. The orthogonality between scaling value sequences used between the multiple transmit antennas allows the receiver to distinguish the training sequence as received from the individual transmit antennas, and to thus perform channel estimation with respect to each transmit antenna.

Abstract translation: 具有发射分集的无线通信系统以允许接收机相对于每个天线执行信道估计的方式，在两个或更多个时间间隔上对由两个或更多个天线同时发送的训练序列进行缩放。 发送信号在每个时间间隔的每个天线处按照从一组正交缩放值中选择的对应的缩放值进行缩放。 接收机为每个时间间隔形成信道估计，就好像只有一个天线发送训练序列一样。 然后，使用来自相应缩放值矩阵列的值，对每个发射天线对这些信道估计进行求和或组合。 在多个发射天线之间使用的缩放值序列之间的正交性允许接收机将接收到的训练序列与各个发射天线区分开，从而对每个发射天线执行信道估计。

公开(公告)号：US06608862B1

公开(公告)日：2003-08-19

申请号：US09378314

申请日：1999-08-20

Applicant: Kambiz C. Zangi ,  Dennis Hui

Inventor： Kambiz C. Zangi ,  Dennis Hui

IPC: H03H730

CPC classification number: H04L25/03261 ,  H04L25/03235

Abstract: The impulse response of a prefilter used with a DFSE equalizer in a receiver system is computed. A channel estimate is determined in response to signals received by the receiver system. The channel estimate may include a forward channel estimate and a backward channel estimate. Roots of a z-transform of the forward channel estimate and roots of a z-transform of the backward channel estimate are determined. Those roots of the z-transform of the forward channel estimate having a magnitude greater than one are used to form a z-transform of a forward impulse response of the prefilter while those roots of the z-transform of the backward channel estimate having a magnitude greater than one are used to form a z-transform of a backward impulse response of the prefilter. Forward prefilter coefficients for the prefilter are computed based on the z-transform of the forward impulse response of the prefilter and backward prefilter coefficients for the prefilter are computed based on the z-transform of the backward impulse response of the prefilter. A forward impulse response of a forward composite channel are computed based on the forward prefilter coefficients while a backward impulse response of a backward composite channel are computed based on the backward prefilter coefficients.

Abstract translation: 计算在接收机系统中与DFSE均衡器一起使用的预滤波器的脉冲响应。 响应于由接收机系统接收的信号确定信道估计。 信道估计可以包括前向信道估计和反向信道估计。 确定前向信道估计的z变换的根和反向信道估计的z变换的根。 使用具有大于1的幅度的正向信道估计的z变换的这些根用于形成预滤波器的正向脉冲响应的z变换，而反向信道估计的z变换的那些根具有幅度 大于一个用于形成预过滤器的反向脉冲响应的z变换。 基于前置滤波器的反向脉冲响应的z变换来计算基于预滤波器的前置滤波器的前向脉冲响应的z变换和用于预滤波器的反向预滤波器系数的前置滤波器系数。 基于前向前置滤波器系数计算正向复合信道的正向脉冲响应，而基于反向预滤波器系数计算反向复合信道的反向脉冲响应。

公开(公告)号：US09154974B2

公开(公告)日：2015-10-06

申请号：US13072496

申请日：2011-03-25

Applicant: Jiann-Ching Guey ,  Dennis Hui

Inventor： Jiann-Ching Guey ,  Dennis Hui

IPC: H04B1/38 ,  H04W24/02 ,  H04W16/10

CPC classification number: H04W24/02 ,  H04W16/10

Abstract: An apparatus, system, and method for dynamic, distributed coordination of parameters between a plurality of base stations in a cellular telecommunication network. An inter-cell communication interface connecting each given base station with the given base station's neighboring base stations is extended to communicate parameter settings between the given base station and the neighboring base stations. An apparatus in each given base station receives from the given base station's neighboring base stations, parameter settings being utilized by the neighboring base stations for transmitting and/or receiving in associated neighboring cells. The apparatus utilizes the parameter settings received from the neighboring base stations as factors to determine local parameter settings for the given base station. The given base station then sends the local parameter settings and supplemental information to the neighboring base stations so that optimal network-wide parameter settings can be selected.

Abstract translation: 一种用于蜂窝电信网络中的多个基站之间的参数的动态，分布式协调的装置，系统和方法。 将每个给定基站与给定基站的相邻基站连接的小区间通信接口被扩展以在给定基站和相邻基站之间传送参数设置。 每个给定基站中的装置从给定基站的相邻基站接收相邻基站利用的参数设置，用于在相关联的相邻小区中发送和/或接收。 该装置利用从相邻基站接收的参数设置作为确定给定基站的本地参数设置的因素。 然后，给定的基站将本地参数设置和补充信息发送到相邻基站，使得可以选择最佳的全网络参数设置。