Patent Document ID: 9042471
Application ID: 14337534
Patent Flag: 1

Claim One:
1. A power line communication system, comprising: a transmitting device configured to generate an OFDM symbol based on a transmitted data; a power line, and a receiving device, including: a receiver configured to receive the OFDM symbol from the transmitting device through the power line; an FFT processor configured to apply an FFT process to the received OFDM symbol to obtain a subcarrier signal; a demapping unit configured to demap the subcarrier signal to generate a bit string; a norm calculator configured to calculate a norm of the subcarrier signal; a weighting factor generator configured to generate a weighting factor by taking statistics of the calculated norm; and a weighting unit configured to obtain a soft decision value by weighting the bit string after demapping based on the weighting factor, wherein the weighting factor generator is configured to generate the weighting factor so that a greater a variation of the norm calculated by the norm calculator, a smaller a likelihood of the soft decision value.