Patent ID: 8711953

Claim:
A transmitter to transmit signals over a wired network to a receiver, the wired network including at least phase, neutral and protective earth wires so that the network establishes multiple wired transmission paths, the transmitter comprising: an adaptive mapping circuit configured to map bits to a plurality of sub-carriers in accordance with constellation information for the respective sub-carriers; an eigenbeamforming circuit configured to eigenbeamform an output of the adaptive mapping circuit using eigenbeamforming information; an orthogonal frequency-division multiplexing (OFDM) modulation circuit configured to OFDM modulate an output of the eigenbeamforming circuit; and a receiving circuit configured to receive feedback information descriptive of the constellation information and the eigenbeamforming information from the receiver via the wired network, wherein the feedback information depends on channel conditions of at least two wired transmission paths established by the wired network, wherein the adaptive mapping circuit includes first and second quadrature amplitude modulation (QAM) modulators, the first QAM modulator is configured to map bits to a plurality of sub-carriers in accordance with first constellation information for the respective sub-carriers, the first constellation information depending on channel conditions of a first one of the at least two wired transmission paths, and the second QAM modulator is configured to map bits to a plurality of sub-carriers in accordance with second constellation information for the respective sub-carriers, the second constellation information depending on channel conditions of a second one of the at least two wired transmission paths.