A study on channel estimation using pilot symbols under impulsive PLC channel

In order to improve performance of high-speed power line communication (PLC) using OFDM (Orthogonal Frequency Division Multiplexing), compensation of the influence of additive impulsive noise is required. In this paper, the scheme to make precise channel estimation under impulsive power line channel is proposed. Although many schemes to improve influence of the additive impulsive noise are proposed, they usually require precise estimation of the PLC channel transfer function. We have already proposed the scheme for channel estimation under these situations using the pilot symbols inserted in two successive OFDM symbols. However, data transmission performance slightly degrades because two successive pilot symbols are inserted. In this paper, the scheme to estimate channel transfer function using only one OFDM symbol is proposed. As the result of computer simulation, possibility of precise channel estimation was confirmed under existence of class A impulsive noise.