Information transfer via power line carrier

摘要

A signal superposing apparatus designed, in accordance with a basic power line model taking account of the term of the mutual inductance and that of a self inductance of a transformer connected to AC power lines, with the circuit constants of capacitors selected appropriately to minimize the distortion of information waveform by the effect of the impedance of the transformer, will permit any desired waveform to be superposed over power signals with its distortion being kept to the minimum. In this way, for example a stepwise pulse waveform can be superposed over power signals with the distortion of waveform being minimized, and accordingly CDMA is made possible in a power line carrier system whereby information signals are communicated with power signals on AC power lines being used as carrier wave.