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    • 5. 发明授权
    • Coexistence and incumbent protection in a cognitive radio network
    • 认知无线电网络中的共存和现有保护
    • US08060104B2
    • 2011-11-15
    • US12131031
    • 2008-05-30
    • Apoorv ChaudhriDavid P. GurneyYadunandana N. Rao
    • Apoorv ChaudhriDavid P. GurneyYadunandana N. Rao
    • H04Q7/20
    • H04W16/14H04W52/243H04W52/281H04W52/283H04W52/367H04W72/0453H04W72/0473
    • A method (300, 400) and a communication system (104, 106, 200) for dynamic RF spectrum allocation among a plurality of RF transmitters (108, 110, 112). A message can be received from a first communication system. The message can include a request (130) for available RF spectrum over which to transmit RF signals. The message can indicate a geographic location of a first non-incumbent transmitter (112) associated with the first communication system. Further, for the RF spectrum, a maximum power level can be determined at which the first non-incumbent transmitter may transmit without exceeding a threshold level of interference at least one focal point (134). A RF spectrum list (138) identifying at least the RF spectrum and the determined maximum power level can be communicated to the first communication system.
    • 一种用于多个RF发射机(108,110,112)中的动态RF频谱分配的方法(300,400)和通信系统(104,106,200)。 可以从第一通信系统接收消息。 消息可以包括用于发射RF信号的可用RF频谱的请求(130)。 该消息可以指示与第一通信系统相关联的第一非现在发射机(112)的地理位置。 此外,对于RF频谱,可以确定第一非现在发射机可以在哪个第一非现在发射机可以在不超过至少一个焦点(134)处的阈值干扰电平的情况下发射的最大功率电平。 识别至少RF频谱和确定的最大功率电平的RF频谱列表(138)可被传送到第一通信系统。
    • 8. 发明授权
    • Method and apparatus for multiple frequency RFID tag architecture
    • 多频RFID标签架构的方法和装置
    • US07248165B2
    • 2007-07-24
    • US10937208
    • 2004-09-09
    • Timothy J. CollinsDavid P. GurneyStephen L. KuffnerRichard S. Rachwalski
    • Timothy J. CollinsDavid P. GurneyStephen L. KuffnerRichard S. Rachwalski
    • G08B13/14
    • G06K19/07767G06F19/00G06K19/0723
    • The present invention provides a multi-band, multi-mode RFID tag that uses a single antenna structure and integrated circuit to provide asset location information at any stage of a supply chain. The unified tag design operates at multiple frequencies (or bands) using the antenna structure, for example, 125 kHz, 13.56 MHz, 915 MHz, and 2.45 GHz, and preferably operates electrostatically (at lower frequencies) and electromagnetically (ay higher frequencies). An on-chip frequency monitor in the integrated circuit automatically determines which frequency is present and derives a local clock for the tag's integrated circuit, which can vary in accordance with the frequency or which can be constant. Alternatively, a phase locked loop circuit can be used to derive a local clock signal modulated into the interrogation signal. On-chip matching and power extraction circuits derive power for the tag from the interrogation signal, which is preferably passive. Additionally, a receiver can receive data from the interrogation signal.
    • 本发明提供一种使用单个天线结构和集成电路的多频带多模式RFID标签,以在供应链的任何阶段提供资产位置信息。 统一标签设计使用天线结构(例如125kHz,13.56MHz,915MHz和2.45GHz)在多个频率(或频带)下工作,并且优选静电(在较低频率)和电磁(ay较高频率)下操作。 集成电路中的片上频率监视器自动确定存在哪个频率并导出标签集成电路的本地时钟,该时钟可以根据频率而变化,或者可以是恒定的。 或者,可以使用锁相环电路来导出调制到询问信号中的本地时钟信号。 片上匹配和功率提取电路从询问信号中获取用于标签的功率,优选是被动的。 另外,接收机可以从询问信号接收数据。