An aspect of the disclosure provides a wireless frame transmission method. Such a method includes duplicating a preamble in the frequency domain to form at least one duplicate preamble, each preamble having multiple fields. The method further includes puncturing at least one of the preamble fields in the preamble with a first puncturing pattern and puncturing corresponding preamble fields in the at least one duplicate preamble with at least one additional puncturing pattern. The method further includes transmitting a frame including the preamble, the at least one duplicate preamble and a payload. In some embodiments the preamble and the duplicate preambles are each at different frequencies.