The channel estimation for hybrid Power Line Communication(PLC)& Visible Light Communication(VLC)system based on Orthogonal Frequency Division Multiplexing(OFDM)is investigated.We first introduce a hybrid communication system with PLC and VLC channel models.Then we study two kinds of pilot structure of block type and comb type
two estimation criterions of Least Squares(LS)and Singular Value Decomposition(SVD)
and two interpolation methods of linear interpolation and Discrete Fourier Transform(DFT)-based interpolation.It is shown that SVD combined with linear interpolation is more appropriate to hybrid PLC & VLC system
which has the best performance and is insensitive to pilot space.