公开(公告)号：US08542781B2

公开(公告)日：2013-09-24

申请号：US13050697

申请日：2011-03-17

Applicant: Yi-Pin Eric Wang ,  Dennis Hui

Inventor： Yi-Pin Eric Wang ,  Dennis Hui

IPC: H04L27/00

CPC classification number: H04L25/08 ,  H04L25/03012 ,  H04L25/03159 ,  H04L25/03171 ,  H04L25/03184 ,  H04L25/03312 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: In one of its aspects the technology disclosed herein concerns a method of operating a receiver. The method comprises performing symbol detection by (1) receiving a frequency-domain signal that comprises contribution from time-domain symbols transmitted from one or more transmit antennas; (2) generating a transformation matrix and a triangular matrix based on a frequency domain channel response; (3) using the transformation matrix to transform the received frequency-domain signal to obtain a transformed frequency-domain signal; and (4) performing symbol detection by performing plural stages of detection, each stage of detection using elements of the transformed frequency-domain received signal associated with the detection stage.

Abstract translation: 在其中的一个方面，本文公开的技术涉及操作接收机的方法。 该方法包括：（1）接收包括从一个或多个发射天线发射的时域符号的贡献的频域信号; （2）基于频域信道响应生成变换矩阵和三角矩阵; （3）使用变换矩阵来变换接收到的频域信号以获得变换的频域信号; 和（4）通过执行多级检测来执行符号检测，每个检测阶段使用与检测级相关联的变换的频域接收信号的元素。

公开(公告)号：US08526992B2

公开(公告)日：2013-09-03

申请号：US12746372

申请日：2008-01-08

Applicant: Dennis Hui ,  Kambiz Zangi

Inventor： Dennis Hui ,  Kambiz Zangi

IPC: H04W52/30

CPC classification number: H04B7/0617 ,  H04B7/024 ,  H04B7/0426 ,  H04B7/0465 ,  H04W52/346

Abstract: In a distributed antenna system that includes a plurality of transmitters and a controller, a method, performed by the controller, may be characterized by performing dirty-paper coding on downlink transmissions to users based on an order of the users, calculating beamforming vectors to provide that each of the downlink transmissions associated with each of the users does not interfere with other users, and maximizing, based on the calculated beamforming vectors, a data rate subject to a power constraint of the distributed antenna system.

Abstract translation: 在包括多个发射机和控制器的分布式天线系统中，由控制器执行的方法的特征在于，基于用户的次序对用户的下行链路传输执行脏纸编码，计算波束形成向量以提供 与每个用户相关联的每个下行链路传输不会干扰其他用户，并且基于所计算的波束形成向量，最大化受到分布式天线系统的功率约束的数据速率。

公开(公告)号：US08451959B2

公开(公告)日：2013-05-28

申请号：US13457903

申请日：2012-04-27

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 spatially 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 spatially stacked signal block is used in computing a maximum-likelihood joint estimate of the receiver frequency offset and the spatial covariance of the spatially 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，空间堆叠的信号块由对应于接收信号的两个或多个时间分离样本中的每一个的多分支信号样本形成。 空间堆叠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空间堆叠信号块的空间协方差。

公开(公告)号：US20130128785A1

公开(公告)日：2013-05-23

申请号：US13302767

申请日：2011-11-22

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

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

IPC: H04W52/02

CPC classification number: H04W52/0206 ,  H04W76/28 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/166 ,  Y02D70/24 ,  Y02D70/25

Abstract: Systems and methods are disclosed for providing energy efficient operation for wireless access nodes in a dense deployment of wireless access nodes in a cellular communication network. In one particular embodiment, wireless access nodes form a super dense network. In one embodiment, a wireless access node in a dense deployment of wireless access nodes in a cellular communication network includes a transmitter and a receiver that are operated according to a discontinuous transmit and a discontinuous receive mode of operation. The wireless access node controls one or more duty cycles for the discontinuous transmit and discontinuous receive mode of operation based on an alertness state of the wireless access node. In one embodiment, the one or more duty cycles increase as the alertness state of the wireless access node increases. In this manner, the wireless access node is operated in an energy efficient manner.

Abstract translation: 公开了用于在蜂窝通信网络中的无线接入节点的密集部署中的无线接入节点提供能量效率操作的系统和方法。 在一个特定实施例中，无线接入节点形成超密集网络。 在一个实施例中，蜂窝通信网络中的无线接入节点的密集部署中的无线接入节点包括根据不连续发射和不连续接收操作模式操作的发射机和接收机。 无线接入节点基于无线接入节点的警觉状态来控制用于不连续发射和不连续接收操作模式的一个或多个占空比。 在一个实施例中，随着无线接入节点的警觉状态增加，一个或多个占空比增加。 以这种方式，无线接入节点以节能方式工作。

公开(公告)号：US20120300654A1

公开(公告)日：2012-11-29

申请号：US13521905

申请日：2010-03-22

Applicant: Jiansong Gan ,  Christian Hoymann ,  Dennis Hui

Inventor： Jiansong Gan ,  Christian Hoymann ,  Dennis Hui

IPC: H04W24/00 ,  H04W88/08 ,  H04W88/04

CPC classification number: H04L1/0026 ,  H04B7/065 ,  H04B7/155 ,  H04L1/003 ,  H04L25/0202 ,  H04L43/08

Abstract: A backhaul link is established between a base station and a relay that assists the base station in communicating with a mobile device over an access link established between the relay and the mobile device. The channel response of the back-haul link is determined by estimating first and second parts of the backhaul link channel response, the second part changing faster than the first part. The first part of the backhaul link channel response is estimated by calculating an average of the backhaul link channel response over a predetermined period at the relay and the second part is estimated by calculating variation in the backhaul link channel response over the predetermined period at the relay. Quantized versions of the first and second parts of the backhaul link channel response are transmitted from the relay to the base station over the backhaul link

Abstract translation: 在基站和中继站之间建立回程链路，帮助基站通过在中继站和移动设备之间建立的接入链路与移动设备进行通信。 通过估计回程链路信道响应的第一和第二部分来确定回程链路的信道响应，第二部分比第一部分更快地改变。 回程链路信道响应的第一部分通过计算中继站上的预定时段内的回程链路信道响应的平均值来估计，并且通过在继电器上计算预定时段内的回程链路信道响应的变化来估计第二部分 。 回程链路信道响应的第一和第二部分的量化版本通过回程链路从中继站传送到基站

公开(公告)号：US20120275327A1

公开(公告)日：2012-11-01

申请号：US13491204

申请日：2012-06-07

Applicant: Kambiz Zangi ,  Dennis Hui ,  Abdulrauf Hafeez

Inventor： Kambiz Zangi ,  Dennis Hui ,  Abdulrauf Hafeez

IPC: H04W76/04 ,  H04W24/02

CPC classification number: H04L1/0001 ,  H04J11/0053 ,  H04L1/0022 ,  H04L1/0034 ,  H04L1/02 ,  H04L5/0035 ,  H04L5/006 ,  H04L5/0073

Abstract: A Coordinated MultiPoint (CoMP) cell controller performs network-centric link adaptation for User Equipment (UE) in the CoMP cell. The CoMP cell controller receives at least infrequent channel estimates from a UE in the CoMP cell, from which it estimates downlink channel and thermal noise at the UE. The CoMP cell controller is aware of the desired signal to be received at the UE, and the intra-CoMP cell interference to the UE caused by transmissions to other UEs in the CoMP cell. The CoMP cell receives from the UE reports of inter-CoMP cell interference caused by transmissions by other CoMP cells. Based on the downlink channel quality, the desired signal, the intra-CoMP cell interference, the inter-CoMP cell interference, and the thermal noise, the CoMP cell controller performs link adaptation by selecting modulation and coding schemes, and other transmission parameters, for an upcoming transmission duration (such as a TTI).

Abstract translation: 协调多点（CoMP）小区控制器在CoMP小区中为用户设备（UE）执行以网络为中心的链路自适应。 CoMP小区控制器从CoMP小区中的UE接收至少不频繁的信道估计，从​​UE估计UE处的下行链路信道和热噪声。 CoMP小区控制器知道将在UE处接收的期望信号，以及由CoMP小区中的其他UE的传输引起的对UE的CoMP小区干扰。 CoMP小区从UE接收由其他CoMP小区的传输引起的CoMP间干扰的干扰。 基于下行链路信道质量，期望信号，CoMP间小区干扰，CoMP间干扰和热噪声，CoMP小区控制器通过选择调制和编码方案以及其他传输参数来执行链路自适应，用于 即将到来的传输持续时间（如TTI）。

公开(公告)号：US20120230691A1

公开(公告)日：2012-09-13

申请号：US13045830

申请日：2011-03-11

Applicant: Dennis Hui ,  Shing-Wa Wong ,  Jung-Fu Cheng ,  Jiann-Ching Guey ,  Kambiz Zangi

Inventor： Dennis Hui ,  Shing-Wa Wong ,  Jung-Fu Cheng ,  Jiann-Ching Guey ,  Kambiz Zangi

IPC: H04L25/49 ,  H04J14/00

CPC classification number: H04L5/0073 ,  H04B7/024 ,  H04B7/0452 ,  H04L5/0035 ,  H04W92/12 ,  H04W92/20

Abstract: The amount of multi-antenna signals to be transmitted over the backhaul in a Coordinated MultiPoint (CoMP) system from the central processor (CP) to each base station is reduced. Embodiments of the present invention exploit characteristics of the underlying signal structure, and distribute some baseband processing functionalities—such as channel coding and the application of the multi-user precoding—from the CP to the remote base stations. Additionally, in some embodiments the non-precoded parts of multi-antenna signals are broadcast from the CP to all base stations in the CoMP system, to further reduce the burden on backhaul communications. In one embodiment, the backhaul network is a Gigabit-capable Passive Optical Network (GPON).

Abstract translation: 通过协调多点（CoMP）系统从中央处理器（CP）到每个基站的回程传输的多天线信号的数量减少。 本发明的实施例利用底层信号结构的特征，并将一些基带处理功能（诸如信道编码和多用户预编码的应用）从CP分发到远程基站。 此外，在一些实施例中，多天线信号的非预编码部分从CP广播到CoMP系统中的所有基站，以进一步减少回程通信的负担。 在一个实施例中，回程网络是千兆位无源光网络（GPON）。

公开(公告)号：US08238303B2

公开(公告)日：2012-08-07

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: H04J3/00

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：US08208397B2

公开(公告)日：2012-06-26

申请号：US12555966

申请日：2009-09-09

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

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

IPC: H04L1/00

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：US20120087310A1

公开(公告)日：2012-04-12

申请号：US13329127

申请日：2011-12-16

Applicant: Dennis Hui ,  Kambiz Zangi

Inventor： Dennis Hui ,  Kambiz Zangi

IPC: H04W40/00

CPC classification number: H04B7/024 ,  H04B7/0465 ,  H04W52/346 ,  H04W52/365

Abstract: In a Coordinated Multi-point (CoMP) system, the base station (BS) in each serving cell (or sector) is allowed to use not only its own antennas, but also the antennas of neighboring BSs to transmit to mobile terminals in the serving cell to form a floating CoMP cell. The serving BS in each floating CoMP cell computes tentative linear precoding weights for transmissions from the coordinating BSs in the floating CoMP cell to users in the serving cell of the floating CoMP cell. The serving BS determines the power availability for transmit antennas in the floating CoMP cell that are shared with other floating CoMP cells, and scales the tentative precoding weights based on the power availability of the shared transmit antennas to determine final precoding weights so that the power constraints of the shared transmit antennas will not be violated.

Abstract translation: 在协调多点（CoMP）系统中，每个服务小区（或扇区）中的基站（BS）被允许不仅使用其自己的天线，而且还使用相邻BS的天线来发送给服务中的移动终端 细胞形成浮游CoMP细胞。 每个浮动CoMP单元中的服务BS为浮动CoMP小区中的协调BS的传输计算用于在浮动CoMP小区的服务小区中的用户的临时线性预编码权重。 服务BS确定与其他浮动CoMP小区共享的浮动CoMP小区中的发射天线的功率可用性，并且基于共享发射天线的功率可用性来缩放初步预编码权重，以确定最终预编码权重，使得功率约束 的共享发射天线将不会被违反。