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    • 71. 再颁专利
    • Localization of a mobile device in distributed antenna communications system
    • 分布式天线通信系统中移动设备的定位
    • USRE45505E1
    • 2015-05-05
    • US13974255
    • 2013-08-23
    • ADC Telecommunications, Inc.
    • Stefan ScheinertPeter Walther
    • H04B7/216H04W64/00
    • H04W64/003G01S5/02H04W64/00
    • The present invention provides a method and apparatus for localization of a mobile device in a distributed antenna communications system. In accordance with an embodiment of the invention, a distributed antenna system includes a plurality of distributed antennas that are communicatively coupled to a hub. A mobile communications device to be located is communicatively coupled to the hub via one or more of the antennas. The method for locating the mobile device comprises: receiving a message at the hub that identifies the mobile device to be located; discriminating among communications signals received from each of the distributed antennas using a channel and a spreading code to identify a signal from the mobile device; identifying messages from the mobile device to be located; and determining which of the antennas is closest to the mobile device to be located by monitoring received signal strength of the identified signal.
    • 本发明提供了一种用于在分布式天线通信系统中定位移动设备的方法和装置。 根据本发明的实施例,分布式天线系统包括通信地耦合到集线器的多个分布式天线。 要定位的移动通信设备经由一个或多个天线通信地耦合到集线器。 用于定位移动设备的方法包括:在集线器处接收标识待定位的移动设备的消息; 使用信道和扩展码来区分从每个分布式天线接收的通信信号,以识别来自移动设备的信号; 从移动设备识别要定位的消息; 以及通过监视所识别的信号的接收信号强度来确定哪些天线最靠近待定位的移动设备。
    • 72. 发明授权
    • Forward and reverse calibration for ground-based beamforming
    • 基于地面波束成形的正向和反向校准
    • US09025591B2
    • 2015-05-05
    • US13710063
    • 2012-12-10
    • ViaSat, Inc.
    • Soheil Sayegh
    • H04B7/216H04B7/185
    • H04B7/2041H04B7/18513H04L5/0007H04L5/0048H04W88/16
    • Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite.
    • 根据本发明的实施例提供了用于校准卫星通信系统的返回和前向链路的方法和系统。 计算和/或估计由返回和前向链路引起的相位和/或幅度变化,以有助于波束形成,例如基于地面的波束形成。 分布在一个或多个波束图案内的校准地球站可用于将校准代码发送到网关以校准返回链路。 可以使用网关处的加权最小均方算法来估计返回链路变化。 可以使用通过混合矩阵从网关发送到至少一个校准站的校准码校准前向链路。 正向校准链路还可以校准温度相关信号变化,例如卫星上的双工器变化。
    • 75. 发明授权
    • Method of inserting CDMA beacon pilots in output of distributed remote antenna nodes
    • 在分布式远程天线节点的输出中插入CDMA信标导频的方法
    • US09001811B2
    • 2015-04-07
    • US12468122
    • 2009-05-19
    • Philip M. WalaDean Zavadsky
    • Philip M. WalaDean Zavadsky
    • H04B7/14H04B7/216H04W4/00H04B1/707H04B7/06H04W16/26H04W88/08
    • H04B1/707H04B7/0671H04B2201/70701H04W16/26H04W88/085
    • A communication system to feed remote antenna nodes with simulcast traffic and non-simulcast beacons is provided. The communication system includes a host radio frequency (RF) digitizer, a delay buffer, a summing circuit, and a framer/serializer. The host RF digitizer receives CDMA base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples. The delay buffer is communicatively coupled to receive the samples output from a beacon pilot generator and to output digitally delayed CDMA-digital-beacon-pilot samples having different pseudo-noise offsets. The summing circuit adds the CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples received from the host RF digitizer to form composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples. The framer/serializer is communicatively coupled to receive the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples, and to route the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples to an associated remote antenna node.
    • 提供了一种用于馈送具有联播流量和非联播信标的远程天线节点的通信系统。 通信系统包括主机射频(RF)数字转换器,延迟缓冲器,加法电路和成帧器/串行器。 主机RF数字化器接收CDMA基站信号用于联播CDMA业务承载信道并输出数字采样。 延迟缓冲器被通信地耦合以接收从信标导频发生器输出的采样并输出具有不同伪噪声偏移的数字延迟的CDMA数字信标 - 导频样本。 求和电路将具有不同伪噪声偏移的CDMA数字信标导频样本添加到从主RF数字转换器接收的数字样本,以形成复合同播广 - 唯一偏移信标 - 导频CDMA样本。 成帧器/串行器通信地耦合以接收复合联播 - 唯一偏移信标 - 导频CDMA样本,并且将复合联播加唯一偏移信标导频CDMA样本路由到相关联的远程天线节点。