A novel channel estimation algorithm in OFDM power line communication system

摘要

An OFDM Low-Voltage PLC system is presented in this paper, and time-domain spread structure is proposed in this system, which can improve the reliability of pilots in receiver. To suppress the noise and attenuation of Power Line channel, a novel channel estimation algorithm is proposed. The proposed algorithm makes full use of information of all pilots in one OFDM symbol, and it has an advantage on complexity over LMMSE. Simulation results indicate that the proposed channel estimation algorithm performs better than LMMSE estimator, especially when Signal-to-Noise Ratio (SNR) is below 0dB.