Power line carrier communication method based on signal multipath superposition

The invention relates to a power line carrier communication method based on signal multipath superposition, and the method comprises the following steps: A, a main node, namely a communication initiating node, transmits a frame of data, and the relay level L is equal to 0; b, all nodes receiving the data carry out the following operations in M clock cycles: B.1, frame verification: if verification is wrong, the frame is discarded; b.2, the relay level in the data frame is L + 1, the check code is recalculated, and the data frame is forwarded on time when M clock periods arrive; b.3, judging a target address, if the target address is a node address or a group address or a broadcast address, reserving a data frame and transmitting the data frame to a link layer, otherwise, discarding the data frame; and C, repeating the step B until the forwarding relay level L is equal to Lmax, namely, the maximum value is reached, and stopping forwarding. According to the invention, a precise and synchronous multipath forward