Modified Decoding for Low Density Parity Check Codes over Power Line Channels

Power line communication for home networking is a new convenient method. However, power line communication makes degradation because of the impulsive interference generated by electrical appliances. Therefore, it is the first problem we need to be solved. In this paper, we apply LDPC (low density parity check) codes to AWAN (additive white class a noise) channels which is usually used as the model of impulsive noise environment of power line channels. We propose a modification to Log-BP (log domain belief propagation) decoding which is suitable for AWAN channels. At last, we show the BER (bit error rate) performance of the modified Log-BP decoding over AWAN channels by Monte-Carlo simulation.