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    • 3. 发明公开
    • Intelligent backhaul radio with improved radar detection capability
    • Intelligenter Backhaul-Funk mit verbesserterRadardetektionsfähigkeit
    • EP2843863A1
    • 2015-03-04
    • EP14177662.5
    • 2014-07-18
    • CBF Networks, Inc.
    • Fischer, JeffreyNegus, Kevin J.Gandham, Kishore
    • H04K3/00
    • H04K3/822H04K3/226H04K2203/16H04K2203/18H04K2203/36
    • A radar detector is used with a radio link, the radio link characterized by high duty factor operation of a radio transmitter. The radar detector is located a sufficient distance from the radio transmitter that the radar detector is not overwhelmed by the radio transmission signal in that channel and can detect sufficiently low level radar signals to ascertain potential radio interference at the radar from said radio transmitter. The results of the radar detection are communicated to the transmitter in a way that impacts the transmitter's use of the sensed channel. This communication can occur reactively when a radar detection is achieved (the absence of which indicates no radar has been detected) and/or can be a periodic or event-driven indication that the channel is available for operation (the information expiring if the result is not refreshed).
    • 雷达检测器与无线电链路一起使用,无线电链路的特征在于无线电发射机的高占空比操作。 该雷达探测器位于离无线电发射机足够的距离处,该雷达探测器不被该信道中的无线电传输信号所淹没,并且可以检测足够低的雷达信号,从而确定来自所述无线电发射机的雷达的潜在无线电干扰。 雷达检测的结果以影响发射机对感测信道的使用的方式传送到发射机。 当实现雷达检测(其中没有表示没有检测到雷达)和/或可以是信道可用于操作的周期性或事件驱动指示时,该通信可以反应地发生(如果结果为 不刷新)。
    • 9. 发明授权
    • RADAR DETECTION AND DYNAMIC FREQUENCY SELECTION FOR WIRELESS LOCAL AREA NETWORKS
    • 无线局域网雷达检测与动态频率选择
    • EP1454162B1
    • 2011-07-20
    • EP02737486.7
    • 2002-06-11
    • Atheros Communications, Inc.
    • McFarland, WilliamZeng, ChaohuangDhamdhere, Deepak
    • G01S7/02
    • G01S7/021H04K3/226H04K3/822H04K2203/18H04W24/00H04W72/02H04W84/12
    • A system for detecting and avoiding interference with radar signals in wireless network devices is described. The receiver circuit of the device receives incoming 5 GHz traffic. Such traffic could comprise both WLAN traffic as well as radar signals from radar systems. The incoming packets are treated as an input event, and are screened to be examined as radar pulses. Radar pulses are identified using the length of the detected event. The radar pulses are examined using frequency domain analysis, and the packet train is examined to find gaps between radar pulses. The periodic nature of the packet is determined using frequency domain and time domain analysis to calculate the period of the pulse train. Particular intervals within the pulse train are analyzed using threshold numbers of periodic pulses within the interval and threshold power levels for the pulses. The calculated period information is used to identify the radar source and screen non-radar traffic.
    • 描述了用于检测和避免无线网络设备中的雷达信号干扰的系统。 设备的接收器电路接收传入的5 GHz业务。 这种业务可能包括WLAN业务以及来自雷达系统的雷达信号。 传入的数据包被视为输入事件,并被筛选为雷达脉冲。 使用检测到的事件的长度识别雷达脉冲。 使用频域分析来检查雷达脉冲,并且检查分组列以找到雷达脉冲之间的间隙。 使用频域和时域分析来确定分组的周期性质以计算脉冲序列的周期。 脉冲序列内的特定间隔使用间隔内的周期性脉冲的阈值数量和脉冲的阈值功率水平来分析。 计算的周期信息用于识别雷达源和屏幕非雷达流量。