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31 条记录 (耗时 0.026 秒)

    Method and apparatus for performing directional re-scan of an adaptive antenna
    1.
    发明申请
    Method and apparatus for performing directional re-scan of an adaptive antenna 有权
    用于执行自适应天线的定向重新扫描的方法和装置

    公开(公告)号：US20050143132A1

    公开(公告)日：2005-06-30

    申请号：US10937792

    申请日：2004-09-09

    申请人： James Proctor ,  Lawrence La Mont ,  George Nelson ,  Kenneth Gainey

    发明人： James Proctor ,  Lawrence La Mont ,  George Nelson ,  Kenneth Gainey

    IPC分类号： H01Q1/24 ,  H01Q3/26 ,  H04B7/08 ,  H04Q7/20

    CPC分类号： H01Q1/246 ,  H01Q3/2605 ,  H04B7/0874

    摘要： An antenna apparatus that can increase capacity in a cellular communication system. The antenna operates in conjunction with a mobile subscriber unit and provides a plurality of antenna elements, each coupled to a respective signal control component such as a phase shifter. The phase shift for each antenna element is programmed for optimum reception during, for example, an idle mode when a pilot signal is received. The antenna array creates a beam former for signals to be transmitted from the mobile subscriber unit, and a directional receiving array to more optimally detect and receive signals transmitted from the base station. By directionally receiving and transmitting signals, multipath fading is greatly reduced as well as intercell interference. The phase shifters are adjusted in a coarse and a fine mode. In the coarse mode all phase shifters are jointly incremented through several phase shift values until a signal quality metric is optimized. The coarse adjustment mode is followed by a fine adjustment mode during which the phase shifters are independently adjusted to further optimize the signal quality metric.

    摘要翻译： 一种能增加蜂窝通信系统容量的天线装置。 天线与移动用户单元结合工作，并且提供多个天线元件，每个天线元件耦合到相应的信号控制部件，例如移相器。 当接收到导频信号时，每个天线元件的相移被编程为在例如空闲模式期间的最佳接收。 天线阵列产生用于从移动用户单元发射的信号的波束形成器，以及用于更好地检测和接收从基站发射的信号的定向接收阵列。 通过定向接收和发送信号，多径衰落大大降低以及小区间干扰。 移相器在粗调和精细模式下被调整。 在粗略模式中，所有移相器通过几个相移值共同递增，直到信号质量度量被优化为止。 粗调模式之后是微调模式，在此期间，移相器被独立调整以进一步优化信号质量度量。

    Reverse link correlation filter in wireless communication systems
    2.
    发明申请
    Reverse link correlation filter in wireless communication systems 失效
    无线通信系统中的反向链路相关滤波器

    公开(公告)号：US20080075150A1

    公开(公告)日：2008-03-27

    申请号：US11901571

    申请日：2007-09-17

    申请人： Antoine Rouphael ,  John Hoffmann ,  George Nelson ,  Samir Patel ,  James Proctor ,  Daniel Riley

    发明人： Antoine Rouphael ,  John Hoffmann ,  George Nelson ,  Samir Patel ,  James Proctor ,  Daniel Riley

    IPC分类号： H04B1/69

    CPC分类号： H04B1/707 ,  H04B1/7105 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04B2201/7071

    摘要： A single, common correlation filter (CF) core is provided in a receiver for recovery of data from received code division multiple access (CDMA) signals. Signals are received over CDMA channels with different data rates, where the received signals include user information such as pilot and data symbols that have been spread according to different despreading rates including tier 1, tier 2 and tier 3 rates, where tier 1 is the smallest despreading rate. The received signal is correlated at the smallest despreading rate in the correlation filter (CF) by time multiplexing delayed versions of the pseudorandom noise (PN) code. The correlated information is then demultiplexed and pilot-aided QPSK demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve tier 2 and tier 3 despreading rates. According to an embodiment, the three strongest multipaths components in terms of the received power are selected in a window or time period for optimal information recovery.

    摘要翻译： 在接收机中提供单个公共相关滤波器（CF）核，用于从接收的码分多址（CDMA）信号中恢复数据。 在具有不同数据速率的CDMA信道上接收信号，其中所接收的信号包括诸如导频和数据符号之类的用户信息，所述导频和数据符号根据不同的解扩速率（包括层1，层2和层3速率）进行扩展，其中层1是最小的 解散率。 接收到的信号通过伪随机噪声（PN）码的延迟版本的时间复用以相关滤波器（CF）中的最小解扩频率相关。 然后将相关信息解复用并导频辅助QPSK解调。 解调信息以1级速率的适当整数倍相加，以实现2级和3级解扩速率。 根据实施例，在用于最佳信息恢复的窗口或时间段中选择关于接收功率的三个最强多径分量。

    Access channel structure for wireless communication system
    4.
    发明申请
    Access channel structure for wireless communication system 有权

    公开(公告)号：US20050175071A1

    公开(公告)日：2005-08-11

    申请号：US11103202

    申请日：2005-04-11

    申请人： John Hoffmann ,  George Nelson ,  James Proctor ,  Antoine Rouphael

    发明人： John Hoffmann ,  George Nelson ,  James Proctor ,  Antoine Rouphael

    IPC分类号： H04L7/04 ,  H04Q7/38 ,  H04B1/707

    CPC分类号： H04L5/0046 ,  H04B1/707 ,  H04B2201/70701 ,  H04L7/041

    摘要： A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another portion of the frame is reserved for sending mostly data symbols; however, within this second portion of the frame, additional pilot symbols are interleaved among the data symbols. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading. In particular, a pilot correlation filter provides a phase estimate from the pilot symbols in the preamble portion, which is then used to decode the data symbols in the payload portion. An access acquisition portion of the receiver uses the phase estimates provided by the pilot correlation filter to process the output of a data symbol correlation filter. The additional pilot symbols embedded in the payload portion are used in a cross product operation to further resolve the effects of multipath fading.

    Method and system for economical beam forming in a radio communication system
    7.
    发明申请
    Method and system for economical beam forming in a radio communication system 审中-公开
    无线电通信系统中经济波束形成的方法和系统

    公开(公告)号：US20060104197A1

    公开(公告)日：2006-05-18

    申请号：US11320377

    申请日：2005-12-28

    申请人： James Proctor ,  Lawrence LaMont ,  George Nelson ,  Antoine Rouphael ,  John Hoffmann

    发明人： James Proctor ,  Lawrence LaMont ,  George Nelson ,  Antoine Rouphael ,  John Hoffmann

    IPC分类号： H04J11/00

    CPC分类号： H01Q1/246 ,  H01Q3/26 ,  H04B7/0408 ,  H04B7/0678 ,  H04B7/0848 ,  H04J13/004 ,  H04W88/08

    摘要： Individual RF cables span between element/transceiver pairs in traditional beam forming systems, and the number of elements in an array used for beam forming is thus restricted. To reduce the number of RF cables but maintain or increase the number of elements in an antenna array, an embodiment of the present invention includes electronics at the base of an antenna tower that apply digital multiplexing codes to signals communicated to electronics located at the top of the antenna tower. The electronics at the top demultiplex the signals and transmit them via the antenna array. Received RF signals are processed in a like manner in a reverse direction. Fewer transmission paths (e.g., RF or fiber optic cables) than the number of elements in the antenna array can be used. More antenna elements provide benefits, such as higher user capacity, more antenna beams, narrower antenna beams, and higher in-building penetration.

    摘要翻译： 传统的波束形成系统中的单个RF电缆跨越元件/收发器对之间，因此限制了用于波束成形的阵列中的元件的数量。 为了减少RF电缆的数量，但是维持或增加天线阵列中的元件的数量，本发明的实施例包括在天线塔底部的电子设备，其将数字多路复用码应用于传送到位于 天线塔。 顶部的电子设备将信号解复用并通过天线阵列发送信号。 接收的RF信号以相反的方向以类似的方式被处理。 可以使用比天线阵列中的元件的数量少的传输路径（例如，RF或光纤电缆）。 更多的天线元件提供了诸如更高的用户容量，更多的天线波束，更窄的天线波束和更高的建筑物内穿透性的益处。

    Qualifying available reverse link coding rates from access channel power setting
    8.
    发明申请
    Qualifying available reverse link coding rates from access channel power setting 有权

    公开(公告)号：US20060088021A1

    公开(公告)日：2006-04-27

    申请号：US11295270

    申请日：2005-12-06

    申请人： George Nelson ,  James Proctor ,  John Hoffmann ,  Antoine Rouphael

    发明人： George Nelson ,  James Proctor ,  John Hoffmann ,  Antoine Rouphael

    IPC分类号： H04B7/216

    CPC分类号： H04W72/042 ,  H04J13/00 ,  H04J13/0003 ,  H04L5/22 ,  H04W24/00 ,  H04W28/22 ,  H04W48/08 ,  H04W52/24 ,  H04W52/26 ,  H04W52/365 ,  H04W72/0406 ,  H04W72/0446 ,  H04W72/0466 ,  H04W72/0473 ,  H04W72/048 ,  H04W72/1289 ,  Y02D70/00

    摘要： Data rate allocation decisions are made for a communications channel, such as a wireless reverse link connection. A first parameter used in this determination is a path loss, which is determined by the following process. First, a message is sent from a first station to a second station, such as on a paging channel. The message indicates a forward Effective Radiated Power (ERP) of a pilot signal transmitted by the first station. The second station then determines the received signal strength of this pilot signal, taking into account receiver gains. The path loss can then be estimated by the second station as the difference between the forward ERP data value that it received and the detected received pilot power. The second station also then preferably determines a transmit power level when transmitting a message back to the first station. This transmit power level information is encoded as a digital data word together with the forward path loss information as calculated by the first station. Upon receipt of these two pieces of information by the first station, the forward path loss estimate as calculated by the second station, and the output power value of the second station, the first station can then determine the amount of excess power available at the field unit. This excess power difference is indicative of the amount of dynamic range available in the transmit power amplifier in the particular second station. With this information, the first station can then make a determination as to whether coding rates which require a higher dynamic range will be acceptable for use by the particular second station.