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Data transmission method and apparatus

  • US 10,200,225 B2
  • Filed: 03/29/2017
  • Issued: 02/05/2019
  • Est. Priority Date: 09/30/2014
  • Status: Active Grant
First Claim
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1. A data transmission method, comprising:

  • generating a preamble corresponding to a protocol version of a transmission on a wireless local area network, wherein the preamble comprises a high efficiency signal (HE-SIG) field, wherein the HE-SIG field comprises four symbols including a first orthogonal frequency division multiplexing (OFDM) symbol, a second OFDM symbol, a third OFDM symbol and a fourth OFDM symbol, wherein the four symbols are arranged in order, and input information bits of the first OFDM symbol are the same as that of the second OFDM symbol, and wherein input information bits of the third OFDM symbol are the same as that of the fourth OFDM symbol, wherein the input information bits of the third and fourth OFDM symbols include all left information bits except the input information bits of the first and second OFDM symbols, in information bits that need to be carried in the HE-SIG field, wherein the generating the preamble comprises processing the input information bits of the first and second OFDM symbol, by using a channel encoder, an interleaver, and a first modulator, to obtain the first OFDM symbol, and, by using the channel encoder, without interleaving, and a second modulator to obtain the second OFDM symbol, wherein the first modulator and the second modulator are same or different, and wherein the generating the preamble further comprises processing the input information bits of the third and fourth OFDM symbol, by using the channel encoder, the interleaver, and a third modulator to obtain the third OFDM symbol, and, by using the channel encoder, without interleaving, and a fourth modulator to obtain the fourth OFDM symbol, wherein the third modulator and the fourth modulator are the same or are different; and

    sending the preamble to a receive end device.

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