Method and system for modulating a carrier frequency to support nondestructive bitwise arbitration of a communication medium

摘要

A system for modulating a carrier frequency to support nondestructive bitwise arbitration of a communication medium. The system comprises a first sensor module coupled to a power supply line via a first power line coupling circuit. The first sensor module comprises a first micro-controller and a first transceiver. The first transceiver includes a first transmitter for converting a digital signal received from the first micro-controller into a first analog signal for transmission over the power supply line. The first transmitter includes a first oscillator operating within an allowable frequency deviation to provide a first predetermined onset phase. The system further comprises a second sensor module coupled to the power supply line via a second power line coupling circuit. The second sensor module comprises a second micro-controller and a second transceiver. The second transceiver includes a second transmitter for converting a digital signal received from the second micro-controller into a second analog signal for transmission over the power supply line. The second transmitter includes a second oscillator operating within the allowable frequency deviation to provide a second predetermined onset phase. The second analog signal is different from the first analog signal and the second predetermined onset phase is different from the first predetermined onset phase. The difference between the first predetermined onset phase and the second predetermined onset phase is within a limit.