Outbound interference reduction in a broadband powerline system

摘要

Disclosed is a method and apparatus for reducing outbound interference in a broadband powerline communication system. Data is modulated on first and second carrier frequencies and is transmitted via respective first and second lines of the powerline system. A characteristic of at least one of the carrier signals (e.g., phase or amplitude) is adjusted in order to improve the electrical balance of the lines of the transmission system. This improvement in electrical balance reduces the radiated interference of the powerline system. Also disclosed is the use of a line balancing element on or more lines of the powerline system for altering the characteristics of at least one of the power lines in order to compensate for a known imbalance of the transmission system.

主权项

1. A method for reducing interference radiated by a powerline transmission system comprising:
transmitting first data via a modulated first carrier signal on a first line of the transmission system; transmitting second data via a modulated second carrier signal on a second line of the transmission system; and adjusting a characteristic of at least one of the first and second carrier signals based on a known imbalance between the first line and the second line to improve the electrical balance of the first and second lines of the transmission system, wherein the characteristic is carrier signal phase.