A method of powerline communications (PLC) over a PLC channel including a first node and at least a second node utilizes an algorithm that compiles frames having extended duration physical layer (PHY) headers. A duration or estimated duration of a null of the PLC channel is provided. An extended duration PHY header is compiled including a plurality of symbols and bits having a time duration of the PHY header of at least fifty percent (50%) more than the duration or estimated duration of the null. The compiling includes symbol repetition of at least a portion of the plurality of symbols or bit repetition of at least a portion of the plurality of bits. The first node transmits a frame including a preamble and the extended duration PHY header over the PLC channel to at least the second node.