公开(公告)号：US08923148B2

公开(公告)日：2014-12-30

申请号：US13439759

申请日：2012-04-04

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

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

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US08879428B2

公开(公告)日：2014-11-04

申请号：US13308776

申请日：2011-12-01

Applicant: Dennis Hui ,  Jiann-Ching Guey

Inventor： Dennis Hui ,  Jiann-Ching Guey

IPC: H04L12/28

CPC classification number: H04L43/04 ,  H04L41/0823 ,  H04W16/02 ,  H04W24/02

Abstract: Systems and method are disclosed for graph-based distributed parameter coordination in a communication network. In general, discrete local parameters to be coordinated among communication nodes in the network and their respective performance metrics, or costs, are modeled using a factor graph. Based on the factor graph, a variant of the sum-product algorithm, namely the min-sum algorithm, is applied in order for the communication nodes, through iterative message passing with their neighboring communication nodes, to decide upon optimal values for the local parameters for the communication nodes that collectively optimize a global performance metric across the communication network. In one embodiment, the communication network is a wireless communication network. In one specific embodiment, the wireless communication network is a cellular communication network.

Abstract translation: 公开了用于通信网络中基于图的分布式参数协调的系统和方法。 通常，使用因子图来建模要在网络中的通信节点之间协调的离散局部参数及其各自的性能度量或成本。 基于因子图，应用和积算法的一个变体，即最小和算法，以便通信节点通过与其相邻通信节点的迭代消息传递来决定本地参数的最优值 对于通过通信网络共同优化全局性能度量的通信节点。 在一个实施例中，通信网络是无线通信网络。 在一个具体实施例中，无线通信网络是蜂窝通信网络。

公开(公告)号：US08837621B2

公开(公告)日：2014-09-16

申请号：US13342688

申请日：2012-01-03

Applicant: Jiann-Ching Guey ,  Kumar Balachandran ,  Dennis Hui

Inventor： Jiann-Ching Guey ,  Kumar Balachandran ,  Dennis Hui

IPC: H04B7/02 ,  H04L25/02 ,  H04L5/00 ,  H04B7/06 ,  H04L25/03

CPC classification number: H04B7/0413 ,  H04B7/0626 ,  H04B7/0691 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0232 ,  H04L2025/03808

Abstract: A transmitter, receiver, and method for channel estimation for a Multiple-Input Multiple-Output (MIMO) communication system in which the transmitter includes a multiplicity of transmit antennas spaced such that spacing between adjacent antennas provides a spatial correlation coefficient greater than a threshold level. The transmitter selects a subset of the multiplicity of transmit antennas for transmitting the pilot reference signals. The pilot reference signals are transmitted only from the selected subset of transmit antennas to the receiver. The receiver includes a channel estimator configured to derive a channel estimation for all of the multiplicity of transmit antennas using the received pilot reference signals and known or estimated spatial correlation among the multiplicity of transmit antennas.

Abstract translation: 一种用于多输入多输出（MIMO）通信系统的信道估计的发射机，接收机和方法，其中所述发射机包括多个发射天线，所述多个发射天线间隔开，使得相邻天线之间的间隔提供大于阈值水平的空间相关系数 。 发射机选择用于发射导频参考信号的多个发射天线的子集。 导频参考信号仅从选定的发射天线子集发射到接收机。 接收机包括信道估计器，其被配置为使用所接收的导频参考信号和多个发射天线之间的已知或估计的空间相关性来导出所有多个发射天线的信道估计。

公开(公告)号：US08660597B2

公开(公告)日：2014-02-25

申请号：US13335482

申请日：2011-12-22

Applicant: Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

Inventor： Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

IPC: H04B15/00 ,  H04B7/02

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：US20130308616A1

公开(公告)日：2013-11-21

申请号：US13877518

申请日：2010-10-07

Applicant: Dennis Hui ,  Miguel Lopez

Inventor： Dennis Hui ,  Miguel Lopez

IPC: H04W72/04

CPC classification number: H04W72/0446 ,  H04L1/08 ,  H04L27/18 ,  H04W28/04

Abstract: The embodiments of the present invention relate to a method in a transmitting unit; a method in a receiving unit; a transmitting unit and a receiving unit, in a wireless communication network employing Time Division Multiple Access, TDMA, for transmitting and, receiving and demodulating data, respectively, the data being transmitted in a signal comprising a burst, wherein bursts relating to NMS number of mobile stations are multiplexed into a single time slot. The transmission comprises grouping a block of N b number of user code bits, representing the data to be transmitted, into NDS/NMS groups of user code bits. Mapping the groups of user code bits to data symbols such that one group is represented by one data symbol, thereby obtaining a block of data symbols, wherein each data symbol is drawn from one or more pre-defined complex-valued symbol constellation(s). The transmission further comprises repeating the block of data symbols, such that the burst to be transmitted comprises NMS number of equal blocks of data symbols, rotating the NMS number of blocks of data symbols according to a mobile-station-specific rotation, and transmitting the rotated blocks of data symbols in a burst in the time slot.

Abstract translation: 本发明的实施例涉及发送单元中的方法; 接收单元中的方法; 发射单元和接收单元，在采用时分多址（TDMA）的无线通信网络中，分别用包括脉冲串的信号中的数据发送和接收和接收数据，所述信号包括突发，其中与NMS号 移动台被复用到单个时隙中。 传输包括将表示要发送的数据的N b个用户码位块的块分组成用户码位的NDS / NMS组。 将用户代码位组映射到数据符号，使得一个组由一个数据符号表示，从而获得数据符号块，其中每个数据符号从一个或多个预定义复值符号星座绘制， 。 传输还包括重复数据符号块，使得要传输的突发包括NMS个数量相等的数据符号块，根据移动站特定的旋转来旋转数据符号块的NMS个数， 在时隙中的突发中旋转的数据符号块。

公开(公告)号：US08526407B2

公开(公告)日：2013-09-03

申请号：US12465864

申请日：2009-05-14

Applicant: Kambiz Zangi ,  Jiann-Ching Guey ,  Dennis Hui

Inventor： Kambiz Zangi ,  Jiann-Ching Guey ,  Dennis Hui

IPC: H04W4/00

CPC classification number: H04W72/1231 ,  H04B7/024 ,  H04L5/0066 ,  H04L5/0091

Abstract: Inter-CoMP cell interference is reduced by “extending” at least one CoMP cell to include UEs served by a neighboring CoMP cell in the extended CoMP cell's transmission calculations, so as to minimize interference to the UEs served by other CoMP cells. Each UE in a border sub-cell identifies neighboring CoMP cells from which it receives interference in excess of a threshold value, and includes the interfering CoMP cells in a close-neighbor set. The close-neighbor set is transmitted to the UE's serving CoMP cell controller. When downlink transmissions are scheduled to the target UE, the controller notifies the neighboring CoMP cells in the close-neighbor set, identifying the target UE. Those CoMP cells then use information about the channel conditions from their transmit antennas to the target UE receive antennas to compute transmissions to UEs they serve, with the constraint that interference to the target UE is below a predetermined level.

Abstract translation: 通过在扩展的CoMP小区的传输计算中“延伸”至少一个CoMP小区以包括由相邻CoMP小区服务的UE来减少CoMP间小区干扰，以便最小化对由其他CoMP小区服务的UE的干扰。 边界子小区中的每个UE识别出相邻的CoMP小区，其接收到超过阈值的干扰，并且包括邻近组中的干扰CoMP小区。 近邻集合被发送到UE的服务CoMP小区控制器。 当向目标UE调度下行链路传输时，控制器通知近邻集中的相邻CoMP小区，识别目标UE。 那些CoMP小区然后使用关于从其发射天线到目标UE接收天线的信道条件的信息来计算对它们所服务的UE的传输，其限制是对目标UE的干扰低于预定水平。

公开(公告)号：US20130109421A1

公开(公告)日：2013-05-02

申请号：US13283003

申请日：2011-10-27

Applicant: Jiann-Ching Guey ,  Dennis Hui

Inventor： Jiann-Ching Guey ,  Dennis Hui

IPC: H04W16/18

CPC classification number: H04W24/02 ,  H04L47/822 ,  H04W24/04 ,  H04W92/20 ,  H04W92/24

Abstract: A distributed parameter update procedure is provided for updating parameters that do not have discrete values. When a parameter value is changed, a search is conducted of a parameter space to find a new parameter value minimizes some cost function. The cost function is derived based on the current parameter settings in neighboring nodes. The distributed parameter update procedure may simplify the search process by localizing the search of the parameter space for a new parameter value to the vicinity of the current parameter setting. In some embodiments, the search is conducted along a line of steepest descent emanating from the current parameter setting.

Abstract translation: 提供了分布式参数更新过程，用于更新不具有离散值的参数。 当一个参数值被改变时，进行一个参数空间的搜索以找到一个新的参数值，最小化一些成本函数。 成本函数是根据相邻节点中的当前参数设置得出的。 分布式参数更新过程可以通过将新参数值的参数空间的搜索定位到当前参数设置的附近来简化搜索过程。 在一些实施例中，沿着从当前参数设置发出的最速下降线进行搜索。

公开(公告)号：US20120288022A1

公开(公告)日：2012-11-15

申请号：US13342688

申请日：2012-01-03

Applicant: Jiann-Ching Guey ,  Kumar Balachandran ,  Dennis Hui

Inventor： Jiann-Ching Guey ,  Kumar Balachandran ,  Dennis Hui

IPC: H04B15/00 ,  H04L27/28

CPC classification number: H04B7/0413 ,  H04B7/0626 ,  H04B7/0691 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0232 ,  H04L2025/03808

Abstract: A transmitter, receiver, and method for channel estimation for a Multiple-Input Multiple-Output (MIMO) communication system in which the transmitter includes a multiplicity of transmit antennas spaced such that spacing between adjacent antennas provides a spatial correlation coefficient greater than a threshold level. The transmitter selects a subset of the multiplicity of transmit antennas for transmitting the pilot reference signals. The pilot reference signals are transmitted only from the selected subset of transmit antennas to the receiver. The receiver includes a channel estimator configured to derive a channel estimation for all of the multiplicity of transmit antennas using the received pilot reference signals and known or estimated spatial correlation among the multiplicity of transmit antennas.

Abstract translation: 一种用于多输入多输出（MIMO）通信系统的信道估计的发射机，接收机和方法，其中所述发射机包括多个发射天线，所述多个发射天线间隔开，使得相邻天线之间的间隔提供大于阈值水平的空间相关系数 。 发射机选择用于发射导频参考信号的多个发射天线的子集。 导频参考信号仅从选定的发射天线子集发射到接收机。 接收机包括信道估计器，其被配置为使用所接收的导频参考信号和多个发射天线之间的已知或估计的空间相关性来导出所有多个发射天线的信道估计。

公开(公告)号：US20120188972A1

公开(公告)日：2012-07-26

申请号：US13439759

申请日：2012-04-04

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

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

IPC: H04W72/04

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US08189720B2

公开(公告)日：2012-05-29

申请号：US12275992

申请日：2008-11-21

Applicant: Dennis Hui

Inventor： Dennis Hui

IPC: H04L27/06

CPC classification number: H04L27/2657 ,  H04L27/2671 ,  H04L27/2676 ,  H04L2027/0053 ,  H04L2027/0073

Abstract: An iterative, blind, frequency-offset estimation process that does not require any training signal or demodulated information symbols is disclosed. Receivers embodying the disclosed processes can produce periodic frequency-offset estimates, without running computationally intensive equalization or demodulation algorithms, by exploiting the temporal correlation of the received signal in the time domain, as well as the received signal's correlation across in-phase and quadrature dimensions, in some embodiments, to find a frequency-offset estimate that best fits the received signal in a maximum-likelihood sense. In an exemplary method of estimating receiver frequency offset, a temporally stacked signal block is formed from multi-branch signal samples corresponding to each of two or more time-separated samples of the received signal. The temporally stacked signal block is used in computing a maximum-likelihood joint estimate of the receiver frequency offset and the spatial covariance of the temporally stacked signal block de-rotated by the receiver frequency offset.

Abstract translation: 公开了不需要任何训练信号或解调信息符号的迭代盲盲频率估计过程。 实现所公开的处理的接收机可以通过利用时域中的接收信号的时间相关性以及接收信号在同相和正交尺度上的相关性来产生周期性的频偏估计，而不需要运行计算密集的均衡或解调算法 在一些实施例中，以最大似然意义找到最适合接收信号的频偏估计。 在估计接收机频率偏移的示例性方法中，时间叠加的信号块由对应于接收信号的两个或更多个时间分离样本中的每一个的多分支信号样本形成。 时间叠加的信号块用于计算接收机频率偏移的最大似然联合估计和由接收机频率偏移去旋转的时间叠加的信号块的空间协方差。