Patent ID: 6831551
Filing Date: 2004-12-14
Classification: H04B,H04L

Abstract:
A system for modulating a carrier frequency to support nondestructive bitwise arbitration of a communication medium, comprising:a first sensor module coupled to a power supply line via a first power line coupling circuit, wherein said first sensor module comprises: a first micro-controller; and a first transceiver including a first transmitter for converting a digital signal received from said first micro-controller into a first analog signal for transmission on said power supply line, said first transmitter including a first oscillator operating within an allowable frequency deviation to provide a first predetermined onset phase; and a second sensor module coupled to said power supply line via a second power line couple circuit, wherein said second sensor module comprises: a second micro-controller; and a second transceiver including a second transmitter for converting a digital signal received from said second micro-controller into a second analog signal for transmission on said power supply line, said second transmitter including a second oscillator operating within said allowable frequency deviation to provide a second predetermined onset phase, second analog signal is different from said first analog signal and said second predetermined onset phase is different from said first predetermined onset phase, the difference between said first predetermined onset phase and said second predetermined onset phase being within a limit.