Power supply overlaid real time communication system with OFDM for Industrial Robot Control

This paper presents a design of power supply overlaid real time communication system for industrial robots, and presents development of industrial robot power line channel model emulator on FPGAs. The power supply overlaid communication provides a way to reduce the control cables in industrial robot. Although the interference from AC/DC power signal and Inter-Symbol Interference occur in the power supply line, OFDM reduce the problem. Hence we were designed and fabricated an FFT based OFDM transmitter and receiver for robot power supply overlaid communication. Our system data rate reaches 81 Mbps. It enables to control the industrial robot which needs real time operation.