Method and device for reducing common more signal in power line communication system
AssigneeKoninklijke Philips Electronics N.V.
InventorsThomas Vollmer, Thomas Duerbaum, Georg Sauerlaender
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Abstract
In a wire-bound network which comprises unshielded lines such as power supply lines, electromagnetic radiation is produced when transmitting data above the mains frequency. The device according to the invention comprises active means for reducing or eliminating the common-mode current (I-cm). To this end, these active means generate an artificial dissymmetry which is complementary to that of the network and is measured continuously or periodically.
Claims10
A device for reducing the electromagnetic radiation of a wire-bound transmission system having dissymmetry and unshielded lines, provided for broadband communication and having a transmission path for a transmission signal, the device comprising means for measuring the dissymmetry of the network at a supply point, characterized in that the device comprises means for actively eliminating or reducing the asymmetric signal.
A method of reducing the electromagnetic radiation of a wire-bound transmission system having dissymmetry and unshielded lines, which radiation is produced when data having a frequency above the mains frequency are transmitted, characterized in that, in the method, the current dissymmetry of the network is measured and two output signals (AS1, AS2) having an artificial dissymmetry which is complementary to that of the network are generated from the transmission signal (Tx).
Dependencies are inferred from the claim text.