Low cost multiple pattern antenna for use with multiple receiver systems
    42.
    发明授权
    Low cost multiple pattern antenna for use with multiple receiver systems 失效
    低成本多模式天线,用于多个接收机系统

    公开(公告)号:US07253783B2

    公开(公告)日:2007-08-07

    申请号:US11101914

    申请日:2005-04-08

    IPC分类号: H01Q3/00

    摘要: An antenna assembly includes at least two active or main radiating omni-directional antenna elements arranged with at least one beam control or passive antenna element used as a reflector. The beam control antenna element(s) may have multiple reactance elements that can electrically terminate it to adjust the input or output beam pattern(s) produced by the combination of the active antenna elements and the beam control antenna element(s). More specifically, the beam control antenna element(s) may be coupled to different terminating reactances to change beam characteristics, such as the directivity and angular beamwidth. Processing may be employed to select which terminating reactance to use. Consequently, the radiator pattern of the antenna can be more easily directed towards a specific target receiver/transmitter, reduce signal-to-noise interference levels, and/or increase gain. A Multiple-Input, Multiple-Output (MIMO) processing technique may be employed to operate the antenna assembly with simultaneous beam patterns.

    摘要翻译: 天线组件包括至少两个有源或主辐射全向天线元件,其布置有用作反射器的至少一个光束控制或无源天线元件。 波束控制天线元件可以具有多个电抗元件,其可以电气端接它,以调节由有源天线元件和波束控制天线元件的组合产生的输入或输出波束图案。 更具体地,波束控制天线元件可以耦合到不同的终止电抗以改变诸如方向性和角波束宽度的波束特性。 可以使用处理来选择要使用的终止电抗。 因此,天线的辐射器图案可以更容易地指向特定的目标接收器/发射器,降低信噪比干扰电平和/或增加增益。 可以采用多输入多输出(MIMO)处理技术来操作具有同时波束图案的天线组件。

    Adaptive antenna for use in same frequency networks
    46.
    发明授权
    Adaptive antenna for use in same frequency networks 有权
    用于相同频率网络的自适应天线

    公开(公告)号:US06404386B1

    公开(公告)日:2002-06-11

    申请号:US09616588

    申请日:2000-07-14

    IPC分类号: H01Q322

    摘要: An antenna apparatus which 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 switch. The switch position of each antenna element is programmed for optimum reception during, for example, an idle mode which receives a pilot signal. The antenna array creates a beamformer 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. Various techniques for determining the proper arrangement of signal control components for each antenna element are accommodated.

    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组件例如开关。 每个天线元件的开关位置被编程为例如在接收导频信号的空闲模式期间的最佳接收。 天线阵列创建用于从移动用户单元发送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送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。 用于确定每个天线元件的信号控制部件的适当布置的各种技术被容纳。

    INTERFERENCE CANCELLATION REPEATER INCORPORATING A NON-LINEAR ELEMENT
    47.
    发明申请
    INTERFERENCE CANCELLATION REPEATER INCORPORATING A NON-LINEAR ELEMENT 失效
    插入非线性元件的干扰消除中继器

    公开(公告)号:US20120287968A1

    公开(公告)日:2012-11-15

    申请号:US13106656

    申请日:2011-05-12

    IPC分类号: H04B3/36

    CPC分类号: H04B7/15585

    摘要: A wireless repeater employing echo cancellation uses a non-linear element in digital baseband to compress the digital transmit signal waveform, thereby allowing distortions in the transmitter circuit as well as interference to be cancelled. In one embodiment, the repeater applies non-linear baseband compression to the digital transmit signal in the digital domain to reduce the peak-to-average amplitude of the digital transmit signal prior to digital-to-analog conversion and prior to over-the-air transmission and prior to sampling of the digital transmit signal for use as the reference signal for echo cancellation. The intentionally introduced non-linear distortion in the transmit signal improves echo cancellation and stability of the repeater. In one embodiment, the non-linear compression is applied only when the digital transmit signal is at or exceed a given power level or a given gain level.

    摘要翻译: 使用回波消除的无线中继器使用数字基带中的非线性元件来压缩数字发射信号波形,从而允许发射机电路中的失真以及干扰被取消。 在一个实施例中,中继器对数字域中的数字发射信号应用非线性基带压缩,以减小在数模转换之前和之前的数字发射信号的峰均幅度, 空气传输之前和数字发射信号采样之前用作回波消除的参考信号。 有意引入发送信号中的非线性失真提高了中继器的回波消除和稳定性。 在一个实施例中,仅当数字发射信号处于或超过给定功率电平或给定增益电平时才施加非线性压缩。

    Reducing loop effects in a wireless local area network repeater
    48.
    发明授权
    Reducing loop effects in a wireless local area network repeater 有权
    减少无线局域网中继器的环路效应

    公开(公告)号:US08122134B2

    公开(公告)日:2012-02-21

    申请号:US10530546

    申请日:2003-10-09

    IPC分类号: H04B7/14 G06F15/16

    摘要: A method and apparatus are provided for operating a frequency translating repeater in a wireless local are network (WLAN) having one or more repeaters (200, 204), a network protocol for communicating between one or more base units (100) and one or more client units (104, 105). A first frequency channel may be used for receiving and transmitting, the network protocol defining multiple operating frequencies monitored to detect a transmitted signal. The signal is characterized to determine if associated with the base units. A second frequency channel selected for use by one of the repeaters for retransmission of additional signals based on the characterization.

    摘要翻译: 提供了一种用于在具有一个或多个中继器(200,204)的无线本地网络(WLAN)中操作频率转换中继器的方法和装置,用于在一个或多个基本单元(100)和一个或多个基站 客户端单元(104,105)。 第一频道可以用于接收和发射,定义被监控的多个工作频率的网络协议以检测发射信号。 信号的特征在于确定是否与基本单元相关联。 基于表征,选择用于由一个中继器用于重发附加信号的第二频道。

    Integrated, closely spaced, high isolation, printed dipoles
    50.
    发明授权
    Integrated, closely spaced, high isolation, printed dipoles 有权
    一体化,紧密间隔,高隔离度,印刷偶极子

    公开(公告)号:US07733285B2

    公开(公告)日:2010-06-08

    申请号:US11436041

    申请日:2006-05-18

    IPC分类号: H01Q9/28 H01Q1/38

    CPC分类号: H01Q9/285

    摘要: An antenna configuration includes two closely spaced antennas each positioned so as to be orthogonally polarized with respect to the other. The antenna configuration increases antenna isolation and reduces electromagnetic coupling between donor side antenna and repeat side antenna. The antennas include printed dipoles connected to respective transceivers through respective baluns to balance the non-symmetrical portions of the antenna feed paths to reduce unwanted radiation therein. Printed features such as chokes and non-symmetrical and non-parallel structures are preferably included in the ground plane of a multi-layer circuit board to reduce or eliminate circulating ground currents.

    摘要翻译: 天线配置包括两个紧密间隔的天线,每个天线被定位成相对于另一个正交极化。 天线配置增加天线隔离度,减少施主侧天线与重复侧天线之间的电磁耦合。 天线包括通过相应的巴伦连接到相应的收发器的印刷偶极子,以平衡天线馈送路径的非对称部分,以减少其中的不需要的辐射。 诸如扼流圈和非对称和非平行结构的印刷特征优选地包括在多层电路板的接地平面中,以减少或消除循环接地电流。