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147 条记录 (耗时 0.022 秒)

    Automatic frequency offset compensation in a TDD wireless OFDM communication system
    31.
    发明授权
    Automatic frequency offset compensation in a TDD wireless OFDM communication system 失效
    TDD无线OFDM通信系统中的自动频偏补偿

    公开(公告)号：US07782985B2

    公开(公告)日：2010-08-24

    申请号：US11651249

    申请日：2007-01-09

    申请人： Haitao Wang

    发明人： Haitao Wang

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L27/266 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/2675

    摘要： Offsets in the transmit clock in a wireless communication system are corrected by using data distributed over many frequencies. In the time domain the system uses separate copies of the same signal transmitted with a known spacing in terms of transmit clock signals. The variation of timing between the received signals yields an initial estimate that then is used in a closed loop tracking arrangement to yield and compensate for unpredictable rate changes caused by, for example, jitter, Doppler or thermal drift. The frequency offset for one channel can then be used to calculate the offset for other channels.

    摘要翻译： 通过使用分布在许多频率上的数据来校正无线通信系统中发射时钟的偏移。 在时域中，系统使用在传输时钟信号方面以已知间隔传输的相同信号的单独副本。 接收信号之间的定时变化产生初始估计，然后将其用于闭环跟踪装置中以产生并补偿由例如抖动，多普勒或热漂移引起的不可预测的速率变化。 然后可以使用一个通道的频率偏移来计算其他通道的偏移量。

    Systems and methods for coordinating the coverage and capacity of a wireless base station
    32.
    发明申请
    Systems and methods for coordinating the coverage and capacity of a wireless base station 有权

    公开(公告)号：US20100172268A1

    公开(公告)日：2010-07-08

    申请号：US12651820

    申请日：2010-01-04

    申请人： Douglas O. Reudink

    发明人： Douglas O. Reudink

    IPC分类号： H04L12/28

    CPC分类号： H04W16/10 ,  H04J11/0083 ,  H04W16/28 ,  H04W24/02 ,  H04W88/10

    摘要： A communications base station is installed at a selected new location and the base station, prior to going “on line” monitors the wireless traffic from other base stations within interference range of the new base station's coverage area. The new base station also monitors the wireless traffic between mobile devices within its coverage area and these other base stations. Based upon these monitored conditions, as well as other known conditions, the new base station then determines the transmitting parameter configuration it should imply in order to achieve a desired optimization between capacity and coverage area. After the new base station is on line, a central control can monitor the entire network to determine if any additional changes are necessary and if so the new transceiver, or any other transceiver, can be instructed to monitor itself with respect to interference and to take corrective action to improve overall network coverage and capacity.

    System and method for mitigating data flow control problems in the presence of certain interference parameters
    33.
    发明授权
    System and method for mitigating data flow control problems in the presence of certain interference parameters 有权
    在存在某些干扰参数的情况下减轻数据流控制问题的系统和方法

    公开(公告)号：US07675840B1

    公开(公告)日：2010-03-09

    申请号：US11939874

    申请日：2007-11-14

    申请人： Jerry Prismantas ,  Jean-Francois Grenon ,  Lycklama A'nyeholt Heinz ,  Randy J. Karr ,  Bruce C. Rothaar

    发明人： Jerry Prismantas ,  Jean-Francois Grenon ,  Lycklama A'nyeholt Heinz ,  Randy J. Karr ,  Bruce C. Rothaar

    IPC分类号： H04J1/12

    CPC分类号： H04L1/0006 ,  H04B1/1027 ,  H04K3/822 ,  H04K2203/18

    摘要： A radar, or other repetitive interference, detection and data flow control system and method for RF data transmissions uses an RF detector and an omni directional antenna to detect radar or similar signals. The information from the RF detector is communicated to a hub data transmission unit which processes the data about the signal provided by the detector. This information is used by the hub to schedule communications between the hub and subscriber units so that none of the communications between the hub and subscriber fall within the time period of the interfering pulses. Although there are no communications during the time periods of the pulses, the efficiency of communications is improved because collisions and retransmission of data are avoided.

    摘要翻译： 用于RF数据传输的雷达或其他重复干扰，检测和数据流控制系统和方法使用RF检测器和全向天线来检测雷达或类似信号。 来自RF检测器的信息被传送到集线器数据传输单元，其处理关于由检测器提供的信号的数据。 集线器使用该信息来调度集线器和用户单元之间的通信，使得集线器和订户之间的任何通信都不会落入干扰脉冲的时间段内。 虽然在脉冲的时间段内没有通信，但是通过避免数据的冲突和重发，提高通信效率。

    Method and system for switching antenna and channel assignments in broadband wireless networks
    34.
    发明授权
    Method and system for switching antenna and channel assignments in broadband wireless networks 失效
    宽带无线网络切换天线和信道分配的方法和系统

    公开(公告)号：US07573851B2

    公开(公告)日：2009-08-11

    申请号：US11007064

    申请日：2004-12-07

    申请人： Guanbin Xing ,  Manyuan Shen ,  Hui Liu

    发明人： Guanbin Xing ,  Manyuan Shen ,  Hui Liu

    IPC分类号： H04Q7/00

    CPC分类号： H04L5/06 ,  H04B7/0452 ,  H04B7/0613 ,  H04B17/24 ,  H04B17/382 ,  H04L5/023 ,  H04L27/261 ,  H04W28/18 ,  H04W48/16 ,  H04W72/04 ,  H04W72/0453 ,  H04W72/085

    摘要： A method and apparatus for antenna switching, grouping, and channel assignments in wireless communication systems. The invention allows multiuser diversity to be exploited with simple antenna operations, therefore increasing the capacity and performance of wireless communications systems. Channel characteristics indicative of signal reception quality for downlink or bi-directional traffic for each channel/antenna resource combination are measured or estimated at a subscriber. Corresponding channel characteristic information is returned to the base station. Channel characteristics information may also be measured or estimated for uplink or bi-directional signals received at each of multiple receive antenna resources. The base station employs channel allocation logic to assign uplink, downlink and/or bi-directional channels for multiple subscribers based on channel characteristics measured and/or estimated for the uplink, downlink and/or bi-directional channels.

    摘要翻译： 一种用于无线通信系统中的天线切换，分组和信道分配的方法和装置。 本发明允许利用简单的天线操作来利用多用户分集，从而增加无线通信系统的容量和性能。 指示用于每个信道/天线资源组合的下行链路或双向业务的信号接收质量的信道特性在用户处被测量或估计。 相应的信道特征信息返回给基站。 还可以对在多个接收天线资源中的每一个处接收的上行链路或双向信号测量或估计信道特性信息。 基站采用信道分配逻辑以基于针对上行链路，下行链路和/或双向信道测量和/或估计的信道特性为多个用户分配上行链路，下行链路和/或双向信道。

    Systems and methods for increasing mobility in fixed wideband wireless applications
    37.
    发明申请
    Systems and methods for increasing mobility in fixed wideband wireless applications 审中-公开
    用于增加固定宽带无线应用中移动性的系统和方法

    公开(公告)号：US20080137609A1

    公开(公告)日：2008-06-12

    申请号：US11651240

    申请日：2007-01-09

    申请人： Heng Pan ,  Shuxin Liu

    发明人： Heng Pan ,  Shuxin Liu

    IPC分类号： H04Q7/00

    CPC分类号： H04W36/26 ,  H04W28/24

    摘要： By arranging base stations in a wireless protocol with an ability to handle air interface transmissions on a class of service basis, as opposed to a specific station identification basis, mobility across base stations is achieved. In one embodiment, each station is assigned a class of service and each station can connect to any base station that recognizes that station's class of service. Class of service could, for example, be based on throughput required, fees paid by the station, etc. In this manner, the base station need only know the class of service of a station and then can extend service to that station or not based on factors controlled from each base station. In one embodiment, the class of service information provided with the 802.16f management model is used to verify the class of service of a station and to update base stations.

    摘要翻译： 通过将无线协议中的基站设置为具有在一类服务基础上处理空中接口传输的能力，与特定的站标识相反，实现了基站的移动性。 在一个实施例中，每个站被分配一类服务，并且每个站可以连接到识别该站的服务等级的任何基站。 例如，服务等级可以基于所需的吞吐量，车站支付的费用等。以这种方式，基站仅需要知道车站的服务等级，然后才能将服务扩展到该车站 从每个基站控制的因素。 在一个实施例中，提供有802.16f管理模型的服务信息类别用于验证站的服务等级并更新基站。

    Systems and methods for transporting data across an air interface using reduced address headers
    38.
    发明申请
    Systems and methods for transporting data across an air interface using reduced address headers 失效
    使用减少的地址头通过空中接口传输数据的系统和方法

    公开(公告)号：US20080137567A1

    公开(公告)日：2008-06-12

    申请号：US11651238

    申请日：2007-01-09

    申请人： Guichang Fang

    发明人： Guichang Fang

    IPC分类号： H04B7/00

    CPC分类号： H04L69/22 ,  H04L45/745 ,  H04L69/04 ,  H04W8/26 ,  H04W28/06 ,  H04W80/02 ,  H04W84/12

    摘要： Systems and methods are disclosed for transporting data across an air interface using a blending of protocol layers to achieve reduced bandwidth. Advantage is taken of the fact that the extra overhead from, for example, the Ethernet protocol is addressing information pertaining to the destination of the packet. This destination information (for example, the Ethernet address) can be stripped from the transmission prior to the air interface and recreated after the air interface. In one embodiment, the concepts of a proper Layer 2 CS are merged on top of the 802.16 protocol and still retain the benefits of a Layer 2 transparent bridged service layer to the network layer. In one embodiment, the MAC address of the destination is used for the air interface and the Ethernet address is recreated and added on the far side of the air interface.

    摘要翻译： 公开了用于使用协议层的混合在空中接口上传输数据以实现减少的带宽的系统和方法。 优点在于，例如以太网协议的额外开销是寻址与分组的目的地有关的信息。 这个目的地信息（例如，以太网地址）可以在空中接口之前从传输中剥离，并在空中接口之后重建。 在一个实施例中，适当的第2层CS的概念被合并在802.16协议之上，并且仍然将第二层透明桥接服务层的优点保留到网络层。 在一个实施例中，目的地的MAC地址用于空中接口，并且以太网地址被重新创建并添加在空中接口的远端。

    Systems and methods for rapid uplink air interface synchronization
    39.
    发明申请
    Systems and methods for rapid uplink air interface synchronization 失效
    快速上行链路空中接口同步的系统和方法

    公开(公告)号：US20080130766A1

    公开(公告)日：2008-06-05

    申请号：US11651239

    申请日：2007-01-09

    申请人： Xuan Li ,  Manyuan Shen ,  Guanbin Xing

    发明人： Xuan Li ,  Manyuan Shen ,  Guanbin Xing

    IPC分类号： H04L7/00 ,  H04L27/28 ,  H04L27/22

    CPC分类号： H04L27/2655 ,  H04L5/023 ,  H04L27/261 ,  H04L27/2662 ,  H04W52/08 ,  H04W52/146 ,  H04W52/42

    摘要： Rapid uplink synchronization is enabled by reducing a 2D search problem to two 1D search problems, which can generally be performed in less time. Advantage is taken of fact that a mobile device sends a ranging code on multiple sub-carriers. Using the assumption that adjacent sub-carriers will have approximately equivalent channel characteristics, phase ambiguity can be removed by differentially combining pairs of adjacent sub-carriers. Once the phase ambiguity is removed, the code, timing, and power level may be determined relatively quickly. In one embodiment, the values of correlations between received signals and possible codes are compared with a threshold.

    摘要翻译： 通过将2D搜索问题减少到两个1D搜索问题来实现快速上行链路同步，这通常可以在更短的时间内执行。 优点在于移动设备在多个子载波上发送测距码。 使用相邻子载波将具有近似等效信道特性的假设，可以通过差分地组合相邻副载波对来消除相位模糊度。 一旦去除相位模糊度，可以相对快速地确定代码，定时和功率水平。 在一个实施例中，将接收信号与可能代码之间的相关值与阈值进行比较。