A CODED BIT-LOADINGLINEARPRECODEDDISCRETE MULTITONESOLUTION FOR POWER LINE COMMUNICATION

Linear precoded discrete multitone modulation (LP-DMT) sys­ tem has been already proved advantageous with adaptive re­ source allocation algorithm in a power line communication (PLC) context. In this paper, we investigate the bit and en­ ergy allocation algorithm of an adaptive LP-DMT system tak­ ing into account the channel coding scheme. A coded adap­ tive LP-DMT system is presented in the PLC context with a loading algorithm which accommodates the channel coding gains in bit and energy calculations. The performance of a concatenated channel coding scheme, consisting of an inner Wei's 4-dimensionaI16-states trellis code and an outer Reed­ Solomon code, in combination with the proposed algorithm is analyzed. Simulation results are presented for a fixed target bit error rate in a multicarrier scenario under power spectral density constraint. Using a multipath model of PLC channel, it is shown that the proposed coded adaptive LP-DMT system performs better than classical coded discrete multitone.