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    • 7. 发明授权
    • Antenna array calibration
    • 天线阵列校准
    • US07714776B2
    • 2010-05-11
    • US12304711
    • 2007-05-18
    • Timothy S. CooperGerard BaldwinRonan Farrell
    • Timothy S. CooperGerard BaldwinRonan Farrell
    • G01S7/40
    • H01Q3/267H04B17/10H04B17/20
    • An antenna array comprises a surface comprising a replicated pattern of conductive tracks, the tracks defining a plurality of ports. A plurality of antennae are located at ports distributed about the surface. A plurality of radiative transceivers are electrically connected to a respective antenna. A plurality of reference transceivers are electrically connected to a non-radiative impedance located at a respective port so that each reference transceiver is surrounded by a group of antennae and electrically coupled to the group of antennae by the tracks. At least one antenna from at least one group of antennae belongs to one other group of antennae. Calibration circuitry includes a controller associated with each reference transceiver, each controller being arranged to transmit a calibration signal through an associated reference transceiver and to receive and store a received calibration signal from a selected transceiver for the group of antennae coupled to the reference transceiver. Each controller is further arranged to receive and store a calibration signal from the selected transceiver for the group of antennae coupled to the reference transceiver. The calibration circuitry further includes for each other transceiver for the group of antenna, circuitry for adjusting the phase and amplitude of signals transmitted and received by the radiative transceivers relative to the stored calibration signals for the selected radiative transceiver.
    • 天线阵列包括包括导电轨道的复制图案的表面,轨道限定多个端口。 多个天线位于围绕表面分布的端口处。 多个辐射收发器电连接到相应的天线。 多个参考收发器电连接到位于相应端口处的非辐射阻抗,使得每个参考收发器被一组天线包围并由轨道电耦合到该组天线。 来自至少一组天线的至少一个天线属于另一组天线。 校准电路包括与每个参考收发器相关联的控制器,每个控制器被布置成通过相关联的参考收发器发送校准信号,并且从与所述参考收发器耦合的所述天线组的所选收发器接收和存储所接收的校准信号。 每个控制器还被布置成从所选择的收发器接收并存储耦合到参考收发器的天线组的校准信号。 校准电路还包括用于天线组的每个其他收发器,用于调整辐射收发器相对于所选择的辐射收发器所存储的校准信号发送和接收的信号的相位和幅度的电路。
    • 8. 发明授权
    • Congestion control in data networks
    • 数据网络拥塞控制
    • US07394762B2
    • 2008-07-01
    • US10829105
    • 2004-04-21
    • Douglas LeithRobert N. Shorten
    • Douglas LeithRobert N. Shorten
    • G01R31/08G06F11/00
    • H04L47/10H04L47/193H04L47/263H04L47/283H04L69/16H04L69/163Y02D50/10
    • Disclosed are methods of congestion control in transmission of data in packets over a network link using a transport layer protocol, and transmission methods and protocol systems to implement such methods. The number of unacknowledged packets in transit is less than or equal to a congestion window value cwndi which can be varied according to an additive-increase multiplicative-decrease (AIMD) law having an increase parameter αi. In embodiments, αi can be increased during each congestion epoch at a time after the start of a congestion epoch, or based on time since the start of a congestion epoch. In embodiments, a multiplicative decrease parameter βi can be set based on a characteristic(s) of a data flow(s) carried over the network link. For example, the value of βi may be set as the value of the round-trip time of data traversing the link or based on the minimum of the mean inter-packet time.
    • 公开了使用传输层协议通过网络链路分组的数据传输中的拥塞控制的方法,以及实现这种方法的传输方法和协议系统。 传输中未确认的数据包的数量小于或等于可以根据具有增加参数α >我。 在实施例中,可以在拥塞时期开始之后的每个拥塞时期,或者基于从拥塞时期开始以来的时间来增加αi i i i。 在实施例中,可以基于通过网络链路承载的数据流的特性来设置乘法减小参数βi i。 例如,可以将β的值设置为穿过链路的数据的往返时间的值,或者基于平均分组间时间的最小值。