公开(公告)号：US20120236774A1

公开(公告)日：2012-09-20

申请号：US13048226

申请日：2011-03-15

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

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

IPC: H04W72/10

CPC classification number: H04W28/16 ,  H04W72/04 ,  H04W92/12

Abstract: A system for managing radio access resources includes a joint radio resource management/transport resource management unit configured to communicate with a plurality of radio units over a transport network, to jointly allocate radio resources at the radio unit and transport resources on the transport network in response to requests from wireless terminals requesting access to radio resources from the radio units, to send a radio resource allocation schedule to the plurality of radio units that defines radio resource allocations for the wireless terminals, and to generate a transport resource allocation schedule that defines transport resource allocations for the wireless terminals. The system further includes a transport resource controller configured to receive the transport resource allocation schedule and to map user data to physical transport resources on the transport network in response to the transport resource allocation schedule.

Abstract translation: 一种用于管理无线电接入资源的系统包括：联合无线电资源管理/传输资源管理单元，被配置为通过传输网络与多个无线电单元进行通信，以在无线电单元处共同分配无线电资源，并响应于传输网络上的资源传输 向来自无线单元请求接入无线电资源的无线终端的请求向定义无线终端的无线资源分配的多个无线单元发送无线资源分配调度，并生成定义传输资源的传输资源分配调度 为无线终端分配。 该系统还包括传输资源控制器，其被配置为接收传输资源分配调度，并且响应于传输资源分配调度，将用户数据映射到传输网络上的物理传输资源。

公开(公告)号：US08199865B2

公开(公告)日：2012-06-12

申请号：US11993522

申请日：2005-06-28

Applicant: Dennis Hui ,  Abdulrauf Hafeez

Inventor： Dennis Hui ,  Abdulrauf Hafeez

IPC: H04L7/00 ,  H04B17/00

CPC classification number: H04L25/0212 ,  H04L25/0224

Abstract: A device and method in a radio receiver for generating synchronization and channel estimation information based on three parameters consisting of a synchronization position, at least one whitening filter parameter, and a channel estimate. A spatially and temporally stacked signal model is generated by stacking successive samples of temporally adjacent received signal vectors and corresponding training vectors. Initial estimates of a first one or two of the three parameters are then generated based on the spatially and temporally stacked signal model. The rest of the three parameters are then computed based on the initial estimates of the first one or two parameters. If a stopping criterion is met, the method ends and the parameters are used to process the signal. If the stopping criterion is not met, additional iterations are performed to improve the synchronization and estimation information.

Abstract translation: 一种无线电接收机中的装置和方法，用于基于由同步位置，至少一个白化滤波器参数和信道估计组成的三个参数来产生同步和信道估计信息。 通过堆叠时间上相邻的接收信号向量和对应的训练向量的连续采样来生成空间和时间叠加的信号模型。 然后基于空间和时间叠加的信号模型来生成三个参数中的第一个或两个的初始估计。 然后根据第一个或两个参数的初始估计值计算三个参数的其余部分。 如果满足停止标准，则该方法结束，参数用于处理信号。 如果不满足停止标准，则执行附加迭代以改善同步和估计信息。

公开(公告)号：US20120100877A1

公开(公告)日：2012-04-26

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: H04W24/02

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：US08024633B2

公开(公告)日：2011-09-20

申请号：US11746679

申请日：2007-05-10

Applicant: Abdulrauf Hafeez ,  Dayong Chen ,  Dennis Hui

Inventor： Abdulrauf Hafeez ,  Dayong Chen ,  Dennis Hui

IPC: G08C25/02

CPC classification number: H04L1/1845 ,  H04L1/1812

Abstract: In a wireless communication network using point-to-point or point-to-multipoint communications, this disclosure teaches the use of combined packets for retransmission and corresponding soft value processing at a receiver, wherein combined packets are formed as the logical combination of two or more previously transmitted packets and allow the receiver to use a single combined packet to correct one or more failed packets. For example, with the combined packet retransmission and corresponding soft value receiver processing as taught herein, a given receiver can use a given combined packet to correct bit errors in all (failed) packets comprising the combined packet as long as the bit errors in a failed packet do not overlap (or align) with bit errors in the other failed packets comprising the combined packet.

Abstract translation: 在使用点对点或点对多点通信的无线通信网络中，本公开教导了在接收机处使用组合分组进行重传和对应的软值处理，其中组合分组被形成为两个或 更先前传输的分组，并允许接收机使用单个组合分组来校正一个或多个故障分组。 例如，通过组合的分组重传和如本文所教导的相应的软值接收器处理，给定的接收机可以使用给定的组合分组来校正包括组合分组的所有（失败的）分组中的比特错误，只要失败的比特错误 分组不与包括组合分组的其他故障分组中的比特错误重叠（或对齐）。

公开(公告)号：US08023938B2

公开(公告)日：2011-09-20

申请号：US11628460

申请日：2004-06-18

Applicant: Johan Axnäs ,  Magnus Olsson ,  Dennis Hui

Inventor： Johan Axnäs ,  Magnus Olsson ,  Dennis Hui

IPC: H04W24/00

CPC classification number: H04B1/7103 ,  H04B2201/70701 ,  H04L25/0224 ,  H04L25/03178 ,  H04L25/03292

Abstract: Signal properties of a signal section (106) comprising a training sequence are compared with corresponding signal properties of other signal sections (108, 110). At a too large discrepancy, co-sequence interference is concluded to be present. The used signal property can preferably be a signal-to-noise ratio measure or a signal statistics measure. If the existence of co-sequence interference (102) is concluded, measures can be taken to avoid such interference and to mitigate the effects of the interference. A method for mitigating effects of co-sequence interference in channel estimation comprises a joint detection and estimation procedure performed under constrictions assuming presence of co-sequence interference.

Abstract translation: 将包括训练序列的信号部分（106）的信号特性与其它信号部分（108,110）的相应信号特性进行比较。 在一个太大的差异上，共序干扰得出结论。 所使用的信号特性可以优选地是信噪比测量或信号统计测量。 如果存在共序干扰（102），则可以采取措施避免这种干扰并减轻干扰的影响。 用于减轻协同干扰在信道估计中的影响的方法包括在假设存在协同干扰的收缩下执行的联合检测和估计过程。

公开(公告)号：US08009727B2

公开(公告)日：2011-08-30

申请号：US11676638

申请日：2007-02-20

Applicant: Dennis Hui ,  Jung-Fu Cheng ,  Håkan B. Björkegren

Inventor： Dennis Hui ,  Jung-Fu Cheng ,  Håkan B. Björkegren

IPC: H04B1/10

CPC classification number: H04L25/03159 ,  H04L5/0007 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: A method of equalizing a received signal compensates for frequency selectivity of the communication channel taking into account channel estimation errors. The method comprises generating channel estimates for the received signal, computing filter weights for an equalizer based on said channel estimates and a covariance of the channel estimation error, and filtering the received signal using the computed filter weights.

Abstract translation: 考虑到信道估计误差，均衡接收信号的方法补偿通信信道的频率选择性。 该方法包括生成接收信号的信道估计，基于所述信道估计和信道估计误差的协方差计算均衡器的滤波器权重，以及使用计算的滤波器权重对接收信号进行滤波。

公开(公告)号：US20100279729A1

公开(公告)日：2010-11-04

申请号：US12746372

申请日：2008-01-08

Applicant: Dennis Hui ,  Kambiz Zangi

Inventor： Dennis Hui ,  Kambiz Zangi

IPC: H04B7/00

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：US20100128824A1

公开(公告)日：2010-05-27

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。

公开(公告)号：US20100040174A1

公开(公告)日：2010-02-18

申请号：US11993605

申请日：2005-07-01

Applicant: Dennis Hui ,  Rajaram Ramesh

Inventor： Dennis Hui ,  Rajaram Ramesh

IPC: H04L25/06

CPC classification number: H04L25/063 ,  H04L25/061

Abstract: A method and arrangement for estimating a DC offset for a signal received in a radio receiver. The received signal includes a digitally modulated signal component, a DC offset component, and a noise component. When the signal is of a known type, such as a Gaussian Minimum Shift Keying (GMSK)-modulated signal with constant amplitude in a GSM/EDGE cellular radio system, the method exploits the known characteristics of the statistical distribution for the known type of signal to obtain a better estimate of the DC offset. The statistical distribution of the received digitally modulated signal component is first analyzed. That statistical distribution is then compared to the known statistical distribution for the known type of signal to identify differences. The differences are then used to estimate the DC offset. Additional iterations may be performed to further improve the DC estimate.

Abstract translation: 一种用于估计在无线电接收机中接收的信号的DC偏移的方法和装置。 接收到的信号包括数字调制信号分量，DC偏移分量和噪声分量。 当信号是GSM / EDGE蜂窝无线电系统中具有恒定振幅的已知类型的高斯最小移频键控（GMSK）调制信号时，该方法利用了已知类型信号的已知统计分布特征 以获得对DC偏移的更好的估计。 首先分析接收到的数字调制信号分量的统计分布。 然后将统计分布与已知的信号类型的统计分布进行比较以识别差异。 然后使用差异来估计DC偏移。 可以执行另外的迭代以进一步改善DC估计。

公开(公告)号：US20090069054A1

公开(公告)日：2009-03-12

申请号：US11850781

申请日：2007-09-06

Applicant: Kambiz C. Zangi ,  Leonid Krasny ,  Dennis Hui

Inventor： Kambiz C. Zangi ,  Leonid Krasny ,  Dennis Hui

IPC: H04M1/00

CPC classification number: H04L5/0082 ,  H04L1/0015 ,  H04L5/0023 ,  H04L5/0058 ,  H04L25/03343 ,  H04W4/08 ,  H04W28/18 ,  H04W72/00

Abstract: According to one or more method and apparatus embodiments taught herein, network base stations reduce temporal variations in the interference perceived by mobile stations operating within the network by slowing down the rate at which they change or otherwise update the linear precoding settings applied to their transmitted Orthogonal Frequency Division Multiplex (OFDM) signals in comparison to the rate at which the base stations perform link adaptation. That is, the precoding-related component of measured interference (e.g., other-cell interference) at the mobile stations is made quasi-stationary with respect to channel quality reporting and link adaptation intervals by fixing the preceding settings used by each base station over time intervals substantially longer than the channel reporting/link adaptation intervals.

Abstract translation: 根据本文教导的一个或多个方法和装置实施例，网络基站通过减慢其改变的速率或以其他方式更新应用于其发送的正交的线性预编码设置的速率来减少在网络内操作的移动站感知到的干扰的时间变化 频分复用（OFDM）信号与基站执行链路自适应的速率相比较。 也就是说，通过固定每个基站随时间推移的先前设置，相对于信道质量报告和链路自适应间隔，将移动站处的测量干扰（例如，其他小区干扰）的预编码相关分量制成准静止 间隔显着长于信道报告/链路自适应间隔。