Turbo TCM Coded OFDM System for Powerline Channel

摘要

In this paper we examine the possibility of improving the OFDM modulated HomePlug networks using Turbo TCM with 64QAM constellation for higher data rate transmission. We simplify the standard Turbo TCM into a punctured parity-concatenated trellis code in which a TCM code is used as the inner code and a simple parity-check code is used as the outer code. The study shows that the system can offer much higher spectral efficiency, for example, 39 Mbps, which is 3 times higher than the current HomePlug1.0 system. We show several essential requirements to achieve high rate such as frequency and time diversifications, multi-level error protection.