Impulse Noise Suppression for G.hn Broadband Power-Line Communication in Smart Grid

Power-line communication (PLC) system can exchange information over the existing electrical grid without much extra implementation cost. Such system will play an important role in the future Smart Grid. However, the system performance of PLC systems will be severely degraded by the multipath fading and random impulse noise (IN). This paper intends to evaluate the performance of different IN detection and reduction schemes combined with low-density parity check (LDPC) decoding for the PLC systems based on G.hn (Gigabit Home Networking) specification. In particular, to improve the system performance, we modify the likelihood value calculation of the LDPC decoder with the information of signal-power and noise-power change due to the process of IN reduction and equalizer.