Performance Analysis of LDPC Coded DMT Systems with Bit-loading Algorithms for Powerline Channel

Abstract

This paper deals with two different approaches to overcome unfavorable channel characteristics and to obtain higher performance of PLC systems: Low Density Parity Check (LDPC) coding and bit-loading algorithms for Discrete Multitone (DMT) modulation. We analyze the performance of LDPC coded DMT systems with bit-loading algorithms in terms of bit-error rate and data rate. Simulations are performed with statistically modeled in-home PLC channel and noise. Several bit-loading scenarios and LDPC coding schemes are also considered. The performances of the proposed DMT systems with and without LDPC codes are analyzed for the broadband PLC system design.