Research on Middle Voltage Power Line OFDM Communication Strategy Based on Channel Estimation

To compress the influence of the noise' dynamic characteristics in Middle-Voltage Power Line Communication (MV-PLC), this paper proposes an OFDM communication strategy based on channel estimation, which is applied to improve the transmission performance of the OFDM system in MV-PLC. Firstly, this paper describes the basic principle of the OFDM communication system including its typical implementation. Then, the proposed strategy is described comprising its basic idea and related implementation, in which the channel estimation is calculated by means of the maximum posteriori-probability method. The strategy can adaptively adjust the OFDM modulation methods according to the channel SNR dynamic characteristics, which may improve the transmission performance. Simulation experiments illustrate that the proposed strategy is of effectiveness, which can guarantee a better transmission rate with ensuring a less bit error rate.