초록 ▼

Two duplex channels are provided using only three lines, two power lines and one neutral line. The transmitter/receiver of each duplex channel includes adaptive filters to cancel cross-coupling introduced by the common neutral line. Each channel is coupled to a power line using a hybrid line driver/

Two duplex channels are provided using only three lines, two power lines and one neutral line. The transmitter/receiver of each duplex channel includes adaptive filters to cancel cross-coupling introduced by the common neutral line. Each channel is coupled to a power line using a hybrid line driver/receiver device. The hybrid line driver/receiver device includes an echo canceller and a bridge circuit to allow transmitting and receiving signals to and from a single power line with minimized echoing effects. The signal-to-noise ratios of each duplex channel is significantly increased so that two duplex channels may be implemented using only three wire connections. Thus, the communication capacity of power line communication systems is greatly increased compared to that for a single 2-wire channel.

대표청구항 ▼

[ What is claimed is:] [1.] A power line communications system, comprising:a first power line and a second power line;a neutral line;a transmitter/receiver coupled to the neutral line and the first and the second power lines, the transmitter/receiver transmitting and receiving information using the

[ What is claimed is:] [1.] A power line communications system, comprising:a first power line and a second power line;a neutral line;a transmitter/receiver coupled to the neutral line and the first and the second power lines, the transmitter/receiver transmitting and receiving information using the first power line and the neutral line as a first channel and the second power line and the neutral line as a second channel, wherein the first channel is independent of the second channel.