In this paper pilot based channel estimation is being considered for Broadband Power Line Communication (BPLC) networks witch used Orthogonal Frequency Division Multiplexing (OFDM) in order to transmit high rate data. To estimate channel in time or frequency some pilot must be used. Number of these pilots and deployment of them is very important for proper estimation in different channel with varying time and frequency. Carrier Sense Multiple Access (CSMA) and hybrid multiple access protocol are taken into consideration in MAC sub-layer. Multi layered perceptions neural network with Back Propagation (BP) learning channel estimator algorithm with different pilot deployment compare to classic algorithm in for channel estimating.