公开(公告)号：US08724443B2

公开(公告)日：2014-05-13

申请号：US13226434

申请日：2011-09-06

申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

IPC分类号： H04J11/00

CPC分类号： H04W72/044 ,  H04B7/2656 ,  H04L1/0026 ,  H04L1/1819 ,  H04L5/0007 ,  H04L5/0055 ,  H04L5/1484 ,  H04L27/2627 ,  H04W72/005 ,  H04W72/0446 ,  H04W72/12

摘要： Methods and apparatus for subframe configuration and generation in a multi-cell multi-carrier system. A frame for radio transmission in the system consists of multiple subframes, and each subframe consists of multiple Orthogonal Frequency Division Multiplexing (OFDM) symbols. Training symbols, frequency-domain data scrambling, size of Fast-Fourier Transform (FFT), or length of cyclic prefix can be configured differently for each subframe to facilitate different applications, such as unicasting or broadcasting.

摘要翻译： 用于多小区多载波系统中的子帧配置和生成的方法和装置。 系统中无线电传输的帧由多个子帧组成，每个子帧由多个正交频分复用（OFDM）符号组成。 可以针对每个子帧对训练符号，频域数据加扰，快速傅立叶变换（FFT）的大小或循环前缀的长度进行配置以便于不同的应用，例如单播或广播。

公开(公告)号：US08547884B2

公开(公告)日：2013-10-01

申请号：US13391044

申请日：2011-09-27

申请人： Titus Lo ,  Xiaodong Li

发明人： Titus Lo ,  Xiaodong Li

IPC分类号： H04L5/14

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/14 ,  H04L41/04 ,  H04L41/044 ,  H04L41/082 ,  H04L41/12 ,  H04L43/0817 ,  H04L43/10 ,  H04L45/02 ,  H04L63/20 ,  H04W8/005 ,  H04W16/14 ,  H04W24/02 ,  H04W48/16 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/18

摘要： Methods and systems are disclosed for communicating in a wireless communications system utilizing a plurality of frequency bands for downlink (DL) transmission and a plurality of frequency bands for uplink (UL) transmission. In an embodiment, a mobile device receives a DL signal via a DL frequency band. The DL signal contains DL-UL frequency-band association information. The DL signal is decoded to obtain the DL-UL frequency-band association information which is used to determine a UL frequency band for UL transmission. The mobile device configures its radio-frequency (RF) circuitry to operate in the UL frequency band for UL transmission.

摘要翻译： 公开了用于在利用用于下行链路（DL）传输的多个频带和用于上行链路（UL）传输的多个频带）的无线通信系统中进行通信的方法和系统。 在一个实施例中，移动设备经由DL频带接收DL信号。 DL信号包含DL-UL频带关联信息。 DL信号被解码以获得用于确定用于UL传输的UL频带的DL-UL频带关联信息。 移动设备将其射频（RF）电路配置为在UL频带中操作用于UL传输。

公开(公告)号：US20130077551A1

公开(公告)日：2013-03-28

申请号：US13391044

申请日：2011-09-27

申请人： Titus Lo ,  Xiaodong Li

发明人： Titus Lo ,  Xiaodong Li

IPC分类号： H04W72/04 ,  H04W72/08 ,  H04W4/06

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/14 ,  H04L41/04 ,  H04L41/044 ,  H04L41/082 ,  H04L41/12 ,  H04L43/0817 ,  H04L43/10 ,  H04L45/02 ,  H04L63/20 ,  H04W8/005 ,  H04W16/14 ,  H04W24/02 ,  H04W48/16 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W84/18

摘要： Methods and systems are disclosed for communicating in a wireless communications system utilizing a plurality of frequency bands for downlink (DL) transmission and a plurality of frequency bands for uplink (UL) transmission. In an embodiment, a mobile device receives a DL signal via a DL frequency band. The DL signal contains DL-UL frequency-band association information. The DL signal is decoded to obtain the DL-UL frequency-band association information which is used to determine a UL frequency band for UL transmission. The mobile device configures its radio-frequency (RF) circuitry to operate in the UL frequency band for UL transmission.

摘要翻译： 公开了用于在利用用于下行链路（DL）传输的多个频带和用于上行链路（UL）传输的多个频带）的无线通信系统中进行通信的方法和系统。 在一个实施例中，移动设备经由DL频带接收DL信号。 DL信号包含DL-UL频带关联信息。 DL信号被解码以获得用于确定用于UL传输的UL频带的DL-UL频带关联信息。 移动设备将其射频（RF）电路配置为在UL频带中操作用于UL传输。

公开(公告)号：US20120327897A1

公开(公告)日：2012-12-27

申请号：US13605784

申请日：2012-09-06

申请人： Haiming Huang ,  Xiaodong Li ,  Titus Lo ,  Kemin Li

发明人： Haiming Huang ,  Xiaodong Li ,  Titus Lo ,  Kemin Li

IPC分类号： H04W56/00 ,  H04W72/04

CPC分类号： H04L12/1881 ,  H04L1/0003 ,  H04L1/0061 ,  H04L1/18 ,  H04L5/0007 ,  H04L5/14 ,  H04L2001/0093 ,  H04N21/2385 ,  H04N21/26208 ,  H04N21/44209 ,  H04N21/6131 ,  H04N21/6582 ,  H04W52/0216 ,  H04W72/005 ,  H04W72/04 ,  H04W84/042 ,  H04W92/10 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168

摘要： In a cellular wireless network, methods and apparatus are disclosed for a signal broadcasting scheme that can be individually augmented for users with poor reception. The network employs a first downlink channel for broadcasting data to all mobile stations, a second downlink channel for sending signals to a specific mobile station in a cell, and an uplink channel for feeding back information to the base station. To achieve a certain user reception quality, the system adjusts its broadcasting parameters based on the statistical analysis of the feedback data. If some users still require better reception, the system individually augments their broadcast signals via the second downlink channels. Methods and apparatus are also disclosed for synchronization of data distribution by base stations, which, in part, allows the receivers to combine the receiving signals and improve their reception quality.

公开(公告)号：US08179991B2

公开(公告)日：2012-05-15

申请号：US12410291

申请日：2009-03-24

申请人： Titus Lo ,  Vahid Tarokh

发明人： Titus Lo ,  Vahid Tarokh

IPC分类号： H04B7/02

CPC分类号： H04L1/0612 ,  H04B7/04 ,  H04B7/0848 ,  H04B7/0854 ,  H04L1/0054 ,  H04L1/0631

摘要： An improved multi-antenna receiver is realized for detecting signals transmitted by a multi-antenna transmitter by summing signals received at the plurality of receiver antennas after multiplying each by a respective constant. The summed signal is applied to a maximum likelihood detector. The respective constants, λj, where j is an index designating a particular receiver antenna, are determined by evaluating the largest eigenvector of the matrix A, where Λ is a vector containing values λj, and A is a matrix containing elements αij, which is the transfer function between the ith transmitter antenna to the jth receiver antenna. The αij terms are determined in the receiver in conventional ways.

摘要翻译： 实现了一种改进的多天线接收机，用于通过对在多个接收机天线之间接收的信号进行求和来检测由多天线发射机发送的信号，每个乘以相应的常数。 将求和的信号应用于最大似然检测器。 通过评估矩阵A的最大特征向量来确定各个常数λj，其中j是指定特定接收机天线的指标，其中Λ是包含值λj的向量，并且A是包含元素αij的矩阵，其是 第i个发射天线与第j个接收机天线之间的传递函数。 在接收机中以常规方式确定αij项。

公开(公告)号：US20120106513A1

公开(公告)日：2012-05-03

申请号：US13347644

申请日：2012-01-10

申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

IPC分类号： H04W36/00 ,  H04B15/00 ,  H04W88/02

CPC分类号： H04L27/2626 ,  H04B1/707 ,  H04B1/711 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0028 ,  H04L25/0228 ,  H04L25/03834 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2647 ,  H04L27/2655

摘要： In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.

摘要翻译： 在宽带无线通信系统中，扩频信号有意地与OFDM信号在时域，频域或两者中重叠。 固有地具有高频谱效率的OFDM信号被用于承载宽带数据或控制信息。 被设计为具有用于克服严重干扰的高扩展增益的扩频信号用于促进系统功能，例如初始随机接入，信道探测或短消息传送。 设计了方法和技术，以确保重叠的信号之间的相互干扰被最小化，以对两个信号具有不显着的影响，并且两个信号可由接收机预期的性能来检测。

公开(公告)号：US08155098B2

公开(公告)日：2012-04-10

申请号：US11571469

申请日：2006-06-06

申请人： Haiming Huang ,  Xiaodong Li ,  Titus Lo ,  Kemin Li

发明人： Haiming Huang ,  Xiaodong Li ,  Titus Lo ,  Kemin Li

IPC分类号： H04J1/00

CPC分类号： H04L12/1881 ,  H04L1/0003 ,  H04L1/0061 ,  H04L1/18 ,  H04L5/0007 ,  H04L5/14 ,  H04L12/189 ,  H04L2001/0093 ,  H04N21/2385 ,  H04N21/26208 ,  H04N21/44209 ,  H04N21/6131 ,  H04N21/6582 ,  H04W52/0216 ,  H04W72/005 ,  H04W72/04 ,  H04W84/042 ,  H04W92/10 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/23

摘要： Methods and apparatus are disclosed for resource configuration in a cellular broadcasting and communication network, where a video stream can be transmitted from a base station to a mobile station as bursts of video and data frames in a particular sequential manner. Special scheduling signals announce video burst information to the subscribing mobile stations, allowing the mobile stations to turn on their transceiver circuitry only when video bursts arrive. In a video burst, the available data resources, in addition to video resources, transmit data application packets and/or special control information to the subscribing mobile stations. Methods and processes are also disclosed for a mobile station to use a single RF tuner within a system with multiple frequency bands.

摘要翻译： 公开了用于蜂窝广播和通信网络中的资源配置的方法和装置，其中可以以特定顺序的方式将视频流作为视频和数据帧的突发从基站发送到移动台。 专用调度信号向订阅的移动台通知视频突发信息，允许移动台仅在视频突发到达时才打开收发器电路。 在视频突发中，除了视频资源之外，可用数据资源向订阅的移动台发送数据应用分组和/或特殊控制信息。 还公开了用于移动台在具有多个频带的系统内使用单个RF调谐器的方法和过程。

公开(公告)号：US20110299474A1

公开(公告)日：2011-12-08

申请号：US13212116

申请日：2011-08-17

申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

IPC分类号： H04W4/00 ,  H04W52/04

CPC分类号： H04L27/2637 ,  H04B1/707 ,  H04B7/0413 ,  H04J11/005 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0028 ,  H04L5/0048 ,  H04L25/0228 ,  H04L25/03834 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2646 ,  H04L27/2655 ,  H04L27/2657 ,  H04W16/02 ,  H04W72/044 ,  H04W72/0446

摘要： A multi-carrier cellular wireless network (400) employs base stations (404) that transmit two different groups of pilot subcarriers: (1) cell-specific pilot subcarriers, which are used by a receiver to extract information unique to each individual cell (402), and (2) common pilots subcarriers, which are designed to possess a set of characteristics common to all the base stations (404) of the system. The design criteria and transmission formats of the cell-specific and common pilot subcarriers are specified to enable a receiver to perform different system functions. The methods and processes can be extended to other systems, such as those with multiple antennas in an individual sector and those where some subcarriers bear common network/system information.

摘要翻译： 多载波蜂窝无线网络（400）使用发射两组不同导频子载波的基站（404）：（1）小区特定导频子载波，由接收机使用以提取每个单独小区唯一的信息（402 ）和（2）公共导频子载波，其被设计为拥有系统的所有基站（404）共有的一组特性。 指定小区特定和公共导频子载波的设计标准和传输格式，以使得接收机能够执行不同的系统功能。 方法和过程可以扩展到其他系统，例如在单个扇区中具有多个天线的那些系统以及某些子载波承载公共网络/系统信息的那些系统。

公开(公告)号：US08041395B2

公开(公告)日：2011-10-18

申请号：US11908262

申请日：2006-11-14

申请人： Titus Lo ,  Xiaodong Li

发明人： Titus Lo ,  Xiaodong Li

IPC分类号： H04M1/00

CPC分类号： H04W16/28 ,  H01Q1/246 ,  H01Q25/00 ,  H04B7/0617 ,  H04L5/005 ,  H04L27/2605 ,  H04W56/0005 ,  H04W56/001 ,  H04W72/0453 ,  H04W88/08

摘要： A multiple-antenna system for use in cellular communication and broadcasting. The multiple-antenna transmission system can be controlled, adjusted, configured, or reconfigured to produce desirable radiation beam patterns suitable for different types of applications. A signal distribution network may be provided in the multiple-antenna system. The signal distribution network is embedded in a transmitter and controls the distribution of signals to one or more antennas in accordance with application requirements. Various antenna radiation patterns suitable for different applications can be generated by reconfiguring the connections and gain settings in the signal distribution network. For example, narrow beams may be generated for use in unicast applications, whereas sector beams may be generated for use in broadcast applications. Certain techniques may be employed to manage the transition from one type of transmission mode to another type of transmission mode.

摘要翻译： 一种用于蜂窝通信和广播的多天线系统。 可以控制，调整，配置或重新配置多天线传输系统以产生适合于不同类型的应用的期望的辐射束图案。 可以在多天线系统中提供信号分配网络。 信号分配网络嵌入到发射机中，并根据应用需求控制信号到一个或多个天线的分布。 可以通过重新配置信号分配网络中的连接和增益设置来生成适合于不同应用的各种天线辐射图。 例如，可以生成用于单播应用的窄波束，而可以生成扇区波束用于广播应用中。 可以采用某些技术来管理从一种类型的传输模式到另一种传输模式的转换。

公开(公告)号：US08009660B2

公开(公告)日：2011-08-30

申请号：US10583530

申请日：2005-01-20

申请人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

发明人： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

IPC分类号： H04J3/06

CPC分类号： H04L27/2637 ,  H04B1/707 ,  H04B7/0413 ,  H04J11/005 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0028 ,  H04L5/0048 ,  H04L25/0228 ,  H04L25/03834 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2646 ,  H04L27/2655 ,  H04L27/2657 ,  H04W16/02 ,  H04W72/044 ,  H04W72/0446

摘要： A multi-carrier cellular wireless network (400) employs base stations (404) that transmit two different groups of pilot subcarriers: (1) cell-specific pilot subcarriers, which are used by a receiver to extract information unique to each individual cell (402), and (2) common pilots subcarriers, which are designed to possess a set of characteristics common to all the base stations (404) of the system. The design criteria and transmission formats of the cell-specific and common pilot subcarriers are specified to enable a receiver to perform different system functions. The methods and processes can be extended to other systems, such as those with multiple antennas in an individual sector and those where some subcarriers bear common network/system information.

摘要翻译： 多载波蜂窝无线网络（400）使用发射两组不同导频子载波的基站（404）：（1）小区特定导频子载波，由接收机使用以提取每个单独小区唯一的信息（402 ）和（2）公共导频子载波，其被设计为拥有系统的所有基站（404）共有的一组特性。 指定小区特定和公共导频子载波的设计标准和传输格式，以使得接收机能够执行不同的系统功能。 方法和过程可以扩展到其他系统，例如在单个扇区中具有多个天线的那些系统以及某些子载波承载公共网络/系统信息的那些系统。