Powerline communicated load control

A system for transmitting communication signals, the system comprising:

• an injector circuit connected, in series, between a powered circuit conductor and a decoder, the injector circuit configured to modulate, in series, an AC power signal with a time sequence of instantaneous DC voltage offsets over at least a portion of a voltage phase to produce one or more bits to be transmitted on the powered circuit conductor, wherein the one or more bits form a command, wherein the AC power signal is modulated with respect to ground/neutral used by AC voltage, and wherein modulating the AC power signal includes varying one or more properties of a periodic waveform by subtracting a magnitude of the DC voltage offsets from a magnitude of the AC voltage;
• and
• the decoder connected to the powered circuit conductor and configured to be connected to a load, the decoder further configured to demodulate the instantaneous DC voltage offsets to extract the command to control the load based on a selected control scheme.