Performance analysis of a OFDM SISO powerline communication system with non-white Gaussian channel noise

摘要

Performance analysis is carried out for a power line communication (PLC) system taking into account the effect of background noise and the transfer function of the PLC. The analysis is carried out with orthogonal FDM (OFDM) carrier along with the effect of background channel noise which non-white power spectral density. The expression of the SNR at the output of the OFDM demodulator is developed for k-th subcarrier. The bit error rate for the k-th subcarrier channel and the average BER is then found analytically. The performance results are evaluated numerically for different number of OFDM subcarriers and several bandwidths of the PLC channel upto 30 MHz. The results show that there is deterioration in BER performance with increase in channel bandwidth. However, the performance can be significantly improved by increasing the number of OFDM subcarriers at a given signal to noise ratio.