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    • 3. 发明申请
    • Radio frequency signal discrimination method and system
    • 射频信号鉴别方法及系统
    • US20050063491A1
    • 2005-03-24
    • US10873925
    • 2004-06-22
    • Brian Saloka
    • Brian Saloka
    • H04L27/00H03D3/00
    • H04L27/0008H04L27/0012
    • A signal detection and discrimination system discriminates between FSK modulated signals and ASK modulated signals and switches a signal receiver mode to accommodate the signal type. A first discrimination stage counts the number of pulses in the signal over a selected time window. If the number of pulses within the time window fall within a valid range, it indicates that the signal is ASK modulated and that there is possible incoming data on the signal. If the number of pulses falls outside the valid range, the pulses are considered noise or data at a different baud rate. If the data signal exhibits no pulses within the time window, it indicates that the data signal is FSK modulated and the receiver is switched from an ASK mode to an FSK mode.
    • 信号检测和识别系统鉴别FSK调制信号和ASK调制信号,并切换信号接收器模式以适应信号类型。 第一鉴别级在所选择的时间窗口中对信号中的脉冲数进行计数。 如果时间窗口内的脉冲数落在有效范围内,则表示该信号被ASK调制,并且信号上有可能的传入数据。 如果脉冲数超出有效范围,脉冲将被视为噪声或波特率不同的数据。 如果数据信号在时间窗口内没有脉冲,则表示数据信号被FSK调制,接收机从ASK模式切换到FSK模式。