Design of a power-line modem for monitoring and control systems

Abstract

We design a power-line communication (PLC) modem applicable to central monitoring and control systems. To make the designed modem robust to frequency-selective and time-varying channel condition, we consider the use of a multicarrier CPFSK modulation scheme. We employ an adaptive impedance loading scheme to reduce the power loss due to impedance mismatch between the channel and analog front end of the modem. The performance of the designed modem is verified by computer simulation. Numerical results show that the use of the proposed modem can transmit data reliably with small power loss in frequency selective channel.