Patent ID: 8199798

Claim:
A method for communicating binary data via an electric signal of a subsea power line, comprising: establishing a point-to-point connection between a subsea electronic unit and a topside electronic unit for transmitting binary data via the electric signal of the subsea power line, at one of the subsea electronic unit and the topside electronic unit, modulating binary data onto said electric signal using orthogonal frequency division multiplexing (OFDM), using 10-200 individual carrier bands in a selected radio frequency range, communicating the OFDM-modulated binary data via the subsea power line to the other one of the subsea electronic unit and the topside electronic unit, and at the other one of the subsea electronic unit and the topside electronic unit, demodulating the OFDM-modulated binary data, including passing the electric signal through a low-pass filter and passing said radio frequency with the modulated binary data through a band-pass filter.