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AssigneeNorweb PLC
InventorPaul Anthony Brown
Estimating the term…
A power transmission network (40) is disclosed which includes an input of telecommunication signals having carrier frequencies greater than 1 MHz onto the network, and a removing similar speech and/or data signals from the network. Preferably a network conditioning element 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 1 MHz 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.
A polyphase electricity distribution and/or power transmission network comprising:
A trunk and branch multipoint electricity distribution and/or power transmission network including input means for input onto the network of a telecommunication signal having a carrier frequency greater than approximately 1 MHz and output means for removing the telecommunication signal from the network.
An electricity distribution and/or power transmission network at least part of which is external to a building, the network including input means for input onto the network of a telecommunication signal having a carrier frequency greater than approximately 1 MHz and output means for removing the telecommunication signal from the network, the telecommunication signal being transmissible along the external part of the network.
A method of signal transmission including:
A method of signal transmission including input of a telecommunication signal having a carrier frequency of greater than approximately 1 MHz onto a trunk and branch multipoint electricity distribution and/or power transmission network, and subsequent reception of the telecommunication signal.
A method of signal transmission including input of a telecommunication signal having a carrier frequency of greater than approximately 1 MHz onto an electricity distribution and/or power transmission network at least part of which is external to a building and subsequent reception of the telecommunication signal, the telecommunication signal being transmitted along the external part of the network.
Dependencies are inferred from the claim text.