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    • 2. 发明申请
    • TRANSMISSION NETWORK AND FILTER THEREFOR
    • 传输网络和过滤器
    • WO1994009572A1
    • 1994-04-28
    • PCT/GB1993002163
    • 1993-10-20
    • NORWEB PLCBROWN, Paul, A.
    • NORWEB PLC
    • H04B03/54
    • H04B3/54H02J13/0024H02J13/0027H04B3/56H04B2203/5466Y02E60/7823Y02E60/7892Y04S40/122Y04S40/146
    • A power transmission network (40) is disclosed which includes input means (52) for the input of telecommunication signals having carrier frequencies greater than 1MHz onto the network (40), and a means for removing similar speech and/or data signals from the network. Preferably a network conditioning element (52) is used which includes a low pass filter portion for filtering out a low frequency high amplitude mains power signal, and a coupling element for input and/or removal of telecommunication signals from the network. In this way both speech and data signals can be transmitted at carrier frequencies of greater than 1MHz along a standard electricity distribution and/or transmission network which when conditioned provides a larger available spectrum per unit length of network and greater transmission capacity than previously known. The quiescent noise level of the conditioned network is also much reduced thus permitting lower signal injection levels for a given signal-to-noise ratio and a consequential reduction in spurious radiation from the network.
    • 公开了一种输电网络(40),其包括用于将具有大于1MHz的载波频率的电信信号输入到网络(40)的输入装置(52),以及用于从网络去除类似的语音和/或数据信号的装置 。 优选地,使用网络调节元件(52),其包括用于滤出低频高幅度市电电力信号的低通滤波器部分,以及用于从网络输入和/或去除电信信号的耦合元件。 以这种方式,语音和数据信号可以沿着标准电力分配和/或传输网络的大于1MHz的载波频率发送,当调节时,提供每单位网络长度的可用频谱和比以前已知的更大的传输容量。 调节网络的静态噪声电平也大大降低,从而允许给定的信噪比降低信号注入电平,从而降低来自网络的杂散辐射。