Patent ID: 8270505
Filing Date: 2012-09-18
Classification: H04B,H04L

Abstract:
1. A method for transmitting a signal between a transmitter and a receiver over a channel of a Power Line Network (PLN), wherein said signal is orthogonal frequency-division multiplexing (OFDM) modulated on a set of sub-carriers, and said PLN includes at least phase, neutral and protective line wires so that said PLN establishes multiple wired transmission paths, the method comprising: receiving, over said multiple wired transmission paths of said PLN at the receiver, a training sequence using said set of sub-carriers; calculating, for said PLN, a channel estimation for each sub-carrier based on said received training sequence; determining an OFDM tonemap and an eigenbeamforming encoding matrix, both based on said calculated channel estimation for each sub-carrier; generating an eigenbeamforming feedback signal, which is descriptive of said eigenbeamforming encoding matrix; generating a tonemap feedback signal, which is descriptive of said OFDM tonemap; and transmitting, over said multiple wired transmission paths of said PLN, information based on said eigenbeamforming feedback signal and said tonemap feedback signal from said receiver to said transmitter.