Outbound interference reduction in a broadband powerline system

A transmitter for use in a powerline communication system having a first transmission line and a second transmission line, the transmitter comprising:

• at least one modulator for modulating first data onto a first carrier signal and for modulating second data onto a second carrier signal;
• and
• a differential driver connected to the at least one modulator for adjusting a characteristic of at least one of the first carrier signal or the second carrier signal to improve an electrical balance of the powerline communication system based on a known imbalance between the first transmission line and the second transmission line, wherein the powerline communication system is a frequency division multiplexed system transmitting the first data and the second data on a plurality of frequency channels and the differential driver performs the adjusting independently for each of the frequency channels.

A method for reducing interference radiated by a powerline transmission system comprising:

• transmitting first and second data via respective modulated first and second carrier signals on respective first and second transmission lines of the powerline transmission system using differential excitation, wherein the powerline transmission system is a frequency division multiplexed system and the first and second data are transmitted via the respective modulated first and second carrier signals on a plurality of frequency channels;
• and
• generating the modulated first and second carrier signals having characteristics that are independently adjusted for each of the plurality of frequency channels to compensate for an imbalance between the first and second transmission lines of the powerline transmission system.