I. Introduction
Narrow band power line communication (NB-PLC) has been proposed as enabler of the smart grid application in the electrical grid networks [1]. The NB-PLC system, which operates in the low frequency range of 10–490 kHz, suffers from background noise, impulsive noise, narrow band interference and the frequency selective multipath behavior of the channel [2]. To overcome the frequency selectivity of the channel, orthogonal frequency division multiplexing (OFDM) has been proposed for the NB-PLC by the existing standards, namely: IEEE 1901.2, PRIME and G3-PLC [1]. In order to mitigate the effects of impulsive noise (IN) and narrow band interference (NBI) some additional efficient signal processing techniques are required [3].