FIELD: wireless communication equipment.
SUBSTANCE: invention relates to communication engineering and can be used in wireless communication systems. Method includes: generating a preamble for a wireless local area network protocol version, where the preamble includes an L-SIG inherited signal field and a HE-SIG high-performance signal field that are arranged in order, at that the HE-SIG field includes a first OFDM symbol with orthogonal frequency division multiplexing and a second OFDM symbol that are arranged in order, and the input information bit of the first OFDM symbol is the same as the second OFDM symbol; and sending the preamble to the receiving terminal device so that the receiving terminal restores the preamble, and when determining that the input information bits obtained after reconstructing the first OFDM symbol and the second OFDM symbol are the same, it is determined that the preamble is the preamble of the protocol version.
EFFECT: technical result is to provide a fast and reliable automatic definition of the preamble of the 802.11ax version.
16 cl, 17 dwg
