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    • 5. 发明授权
    • RFID system with an adaptive array antenna
    • 具有自适应阵列天线的RFID系统
    • US07212116B2
    • 2007-05-01
    • US11009098
    • 2004-12-10
    • James June-Ming WangJack WintersRobert Warner
    • James June-Ming WangJack WintersRobert Warner
    • G08B13/14
    • H01Q1/2208G06K7/10356H01Q3/2605H04B7/0848H04B7/0857
    • The present invention relates to use of a smart antenna for a RF reader on a Radio Frequency Identification (RFID) system to significantly increase the operating range of the RFID system. The smart antenna can be an adaptive antenna array. The smart antenna comprises a plurality of antenna elements and, by combining the signals from multiple antenna elements, significantly increases the received signal-to-noise ratio. In a noise limited environment, combining the signals to maximize the received signal-to-noise ratio can be based on the maximal ratio combining (MRC) principle. To achieve the best signal quality, the received signal from each antenna can be phase-shifted such that the resultant signals from all antennas are in phase. In addition, the signal from each antenna can be scaled in amplitude based on the square root of its received signal-to-noise ratio.
    • 本发明涉及在射频识别(RFID)系统上用于RF读取器的智能天线,以显着增加RFID系统的操作范围。 智能天线可以是自适应天线阵列。 智能天线包括多个天线元件,并且通过组合来自多个天线元件的信号,显着增加了接收到的信噪比。 在噪声限制环境中,组合信号以使接收的信噪比最大化可以基于最大比组合(MRC)原理。 为了实现最佳的信号质量,来自每个天线的接收信号可以进行相移,使得来自所有天线的合成信号同相。 另外,来自每个天线的信号可以根据其接收的信噪比的平方根进行幅度缩放。
    • 7. 发明授权
    • Method and system for inventorying wireless transponders providing anti-eavesdropping anti-collision
    • 提供反窃听防碰撞的无线应答器的方法和系统
    • US08258927B1
    • 2012-09-04
    • US12079826
    • 2008-03-28
    • Robert WarnerJack Winters
    • Robert WarnerJack Winters
    • H04Q5/22
    • G06K7/10059H04Q2213/13095
    • The present invention provides one or more powered wireless transponders and/or one or more passive wireless transponder devices communicating with a reader/interrogator and the method of efficiently inventorying these devices without the risk of eavesdropping. A reader transmits a random number and transponders generate their own random number. The transponders whose random number matches all or a part of the random number responds. If a collision occurs, the reader's random number can be changed and retransmitted until almost one transponder response is verified in a tree search algorithm. Specifically, the invention concerns a method for inventorying wireless transponders providing anti-eavesdropping anti-collision.
    • 本发明提供一种或多种电力无线应答器和/或与阅读器/询问器通信的一个或多个无源无线应答器设备,以及有效地对这些设备进行存货的方法,而不会有窃听的风险。 读者发送一个随机数,并且转发器产生自己的随机数。 随机数匹配随机数的全部或部分的应答器响应。 如果发生冲突,则读取器的随机数可以被改变并重新发送,直到几乎一个应答器响应在树搜索算法中得到验证。 具体地说,本发明涉及一种提供反窃听防碰撞的无线应答器的方法。
    • 8. 发明授权
    • Method and apparatus for low cost, long range, power efficient, wireless system with enhanced functionality
    • 用于低成本,长距离,高效率,功能增强的无线系统的方法和装置
    • US08248981B2
    • 2012-08-21
    • US12691165
    • 2010-01-21
    • Robert WarnerJames WangJack Winters
    • Robert WarnerJames WangJack Winters
    • G08C17/00
    • H04B1/713
    • The present invention provides a method and system for establishing a highly mobile, long range secure wireless network with dynamic topologies and near full connectivity with acceptable latency using low cost, low power, compact and lightweight devices. One aspect of the system deals with a highly mobile network with dynamic network topologies and a time varying wireless medium that has neither absolute nor readily observable boundaries outside of which radio nodes are known to be unable to receive network frames, although the desirable open field boundary is 1 mile in radius from a base station node. A synchronous frequency hopping technique is used with mobile nodes that can become slave base station nodes to a master base station node to increase the effective range of the master base station without increasing the transmit power. Furthermore, the use of adjustable sleep times for the mobile nodes, as well as a novel clock calibration method, provides a substantial range increase with acceptable battery size and system latency.
    • 本发明提供了一种用于使用低成本,低功率,小型和轻量级的设备来建立具有动态拓扑和接近完全连接的高度移动的远程安全无线网络的方法和系统,其具有可接受的等待时间。 该系统的一个方面涉及具有动态网络拓扑结构的高度移动网络以及既不具有绝对的也不容易观察的边界的时变无线介质,其中已知无线电节点不能接收网络帧,尽管所需的开放场边界 距离基站节点半径为1英里。 使用同步跳频技术的移动节点可以成为从基站节点到主基站节点,以增加主基站的有效范围而不增加发射功率。 此外,对于移动节点使用可调节的睡眠时间以及新颖的时钟校准方法,可提供可接受的电池尺寸和系统等待时间的实质范围增加。
    • 9. 发明申请
    • METHOD AND APPARATUS FOR LOW COST, LONG RANGE, POWER EFFICIENT, WIRELESS SYSTEM WITH ENHANCED FUNCTIONALITY
    • 低成本,长距离,功率有效,无线系统具有增强功能的方法与装置
    • US20110176464A1
    • 2011-07-21
    • US12691165
    • 2010-01-21
    • Robert WarnerJames WangJack Winters
    • Robert WarnerJames WangJack Winters
    • H04W52/02H04B1/713
    • H04B1/713
    • The present invention provides a method and system for establishing a highly mobile, long range secure wireless network with dynamic topologies and near full connectivity with acceptable latency using low cost, low power, compact and lightweight devices. One aspect of the system deals with a highly mobile network with dynamic network topologies and a time varying wireless medium that has neither absolute nor readily observable boundaries outside of which radio nodes are known to be unable to receive network frames, although the desirable open field boundary is 1 mile in radius from a base station node. A synchronous frequency hopping technique is used with mobile nodes that can become slave base station nodes to a master base station node to increase the effective range of the master base station without increasing the transmit power. Furthermore, the use of adjustable sleep times for the mobile nodes, as well as a novel clock calibration method, provides a substantial range increase with acceptable battery size and system latency.
    • 本发明提供了一种用于使用低成本,低功率,小型和轻量级的设备来建立具有动态拓扑和接近完全连接的高度移动的远程安全无线网络的方法和系统,其具有可接受的等待时间。 该系统的一个方面涉及具有动态网络拓扑结构的高度移动网络以及既不具有绝对的也不容易观察的边界的时变无线介质,其中已知无线电节点不能接收网络帧,尽管所需的开放场边界 距离基站节点半径为1英里。 使用同步跳频技术的移动节点可以成为从基站节点到主基站节点,以增加主基站的有效范围而不增加发射功率。 此外,对于移动节点使用可调节的睡眠时间以及新颖的时钟校准方法,可提供可接受的电池尺寸和系统等待时间的实质范围增加。