Abstract
This work serves to demonstrate the use of
hybrid QFSK-OFDM and modified BPSK-OFDM in combating
the effects of Narrowband Interference (NBI) and
Impulsive noise (IN) as a mixture in Power Line Communication
channel. Therefore, in this paper we demonstrate the
superiority of modified BPSK-OFDM over QFSK-OFDM and
over conventional BPSK-OFDM. The performance analysis of
the system is carried out by Matlab simulations whereby the
noise models used are the Middleton Class A for IN and NBI
models as found in literature. The simulations show modified
BPSK-OFDM to have better performance of 5 dB in terms
of SNR as compared to QFSK-OFDM and 3 dB better than
the conventional BPSK-OFDM.