Patent ID: 8509333

Claim:
A transmitter for transmitting signals over a Power Line Network (PLN) to a receiver, said PLN including at least phase, neutral and protective line wires so that said PLN establishes multiple wired transmission paths, said transmitter comprising: an adaptive modulation unit configured to use a constellation information to modulate a transmit signal; an eigenbeamforming unit connected to said adaptive modulation unit and configured to use eigenbeamforming encoding information for encoding only payload data included in the transmit signal; an orthogonal frequency division multiplex (OFDM) modulation device connected to said eigenbeamforming unit; and a receiving device connected to said adaptive modulation unit and to said eigenbeamforming unit, wherein said receiving device is configured to receive an eigenbeamforming feedback signal and a tonemap feedback signal from the receiver via said PLN, said eigenbeamforming feedback signal being descriptive of the eigenbeamforming encoding information and said tonemap feedback signal being descriptive of the constellation information corresponding to said multiple wired transmission paths of said PLN.