Design of a robust modem for power line communications

Abstract

We design a power line communication (PLC) modem robust to frequency-selective and timevarying channel condition. We consider the use of an adaptive CPFSK modulation scheme at a transmission rate of up to 2Mbps and TDMA scheme for multiple access. We propose a synchronization scheme for robust and fast frame synchronization and the channel change detector for adaptive modulation. The performance of the designed modem is verified by computer simulation. Numerical results show that the use of the proposed modem can transmit data without interruption even in the case of sudden change of the channel condition.