Electricity distribution and/or power transmission network and filter for telecommunication over power lines
DC CAFCFirst Claim
1. A polyphase electricity distribution and/or power transmission network comprising:
- a plurality of phase conductors;
input means for input of a telecommunication signal having a carrier frequency greater than approximately 1 MHz onto at least one of the phase conductors of the network; and
output means for removing the telecommunication signal from at least one other phase conductor of the network.
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Accused Products
Abstract
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.
195 Citations
29 Claims
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1. A polyphase electricity distribution and/or power transmission network comprising:
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a plurality of phase conductors;
input means for input of a telecommunication signal having a carrier frequency greater than approximately 1 MHz onto at least one of the phase conductors of the network; and
output means for removing the telecommunication signal from at least one other phase conductor of the network. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. 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.
- 14. 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.
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21. A method of signal transmission including:
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transmission of a telecommunication signal having a carrier frequency of greater than approximately 1 MHz onto at least one phase conductor of a polyphase electricity distribution and/or power transmission network; and
subsequent reception of the telecommunication signal from at least one other phase conductor of the network. - View Dependent Claims (22, 23, 24)
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25. 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.
- 26. 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.
Specification