Patent ID: 8750395
Filing Date: 2014-06-10
Classification: H04B,H04L

Abstract:
1. A circuit comprising: a line driver configured and arranged to couple data-carrying symbols over a power line, via a waveform, that carries an alternating current signal having a frequency or phase that varies, relative to a frequency or phase of previous cycles of the alternating current signal, the data-carrying symbols corresponding to respective information signals; a signal-monitoring circuit configured and arranged for monitoring variations in the alternating current signal; a lookup table configured and arranged to store data entries that define, at least in part, data useful for providing steps of the waveform; and a logic circuit configured and arranged to access the data entries in the lookup table, in response to the signal-monitoring circuit, and thereby feed the line driver with stepped data that is processed for modulating the alternating current of the power line with the data-carrying symbols, wherein the steps provided by accessing the lookup table are processed to account for the variations in the alternating current signal.