Remote access unit for wireless wide-area data networking
    2.
    发明授权
    Remote access unit for wireless wide-area data networking 失效
    用于无线广域数据网络的远程访问单元

    公开(公告)号:US06879807B2

    公开(公告)日:2005-04-12

    申请号:US10121992

    申请日:2002-04-12

    摘要: A system is disclosed having a remote access unit and two transceiver modes, one for implementing wireless wide area network communications and another for implementing local wireless network communications. High speed data communications with a cellular system may be maintained in the wireless wide area network mode with the advantage of a flexible and unconstrained remote access unit, which can be placed for improved wireless reception. Computers and other devices with complementary wireless personal network communications protocol units may connect to a wireless wide area network through the remote access unit.

    摘要翻译: 公开了一种具有远程访问单元和两种收发器模式的系统,一种用于实现无线广域网通信,另一种用于实现本地无线网络通信。 可以在无线广域网模式下保持与蜂窝系统的高速数据通信,具有灵活和无约束的远程访问单元的优点,其可被放置以改善无线接收。 具有互补无线个人网络通信协议单元的计算机和其他设备可以通过远程访问单元连接到无线广域网。

    Remote terminal location algorithm
    3.
    发明授权
    Remote terminal location algorithm 失效
    远程终端定位算法

    公开(公告)号:US06408246B1

    公开(公告)日:2002-06-18

    申请号:US09691451

    申请日:2000-10-18

    申请人: Brian L. Fox

    发明人: Brian L. Fox

    IPC分类号: G06F1710

    摘要: The accuracy of location estimates based on time-of-arrival measurements may be improved using a variety of different approaches. In some approaches, accuracy predictions are made before a location estimate is computed, and the location estimate is only computed when a high accuracy is predicted. In other approaches, a plurality of preliminary location estimates are computed, and the accuracy of each preliminary estimate is determined. A final location estimate is then based on the preliminary location estimates with the best determined accuracy. In some approaches, the accuracy predictions and determinations are based on geometric dilution of precision (GDOP) or a known topography of a region. In another approach, a subset of time-of-arrival measurements is fed into a closed-form algorithm to produce a preliminary location estimate. This preliminary location estimate is then used to initialize an open-form location algorithm. Optionally, more than one of these approaches may be combined.

    摘要翻译: 可以使用各种不同的方法来改进基于到达时间测量的位置估计的准确性。 在一些方法中,在计算位置估计之前进行准确度预测,并且仅在预测高精度时才计算位置估计。 在其他方法中,计算多个初步位置估计,并且确定每个初步估计的准确性。 然后,最终位置估计基于具有最佳确定精确度的初步位置估计。 在一些方法中,精度预测和确定是基于几何稀释的精度(GDOP)或一个地区的已知地形。 在另一种方法中,到达时间测量的子集被馈送到闭合形式算法中以产生初步位置估计。 然后使用该初步位置估计来初始化开放形式定位算法。 可选地,可以组合多于一种这些方法。