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Long training field sequence construction

DC
  • US 10,327,172 B2
  • Filed: 03/07/2017
  • Issued: 06/18/2019
  • Est. Priority Date: 03/25/2015
  • Status: Active Grant
First Claim
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1. An apparatus for facilitating wireless communication in a 20 megahertz (MHz) channel bandwidth, the apparatus comprising:

  • one or more memories; and

    one or more processors coupled to the one or more memories, the one or more processors configured to cause;

    determining a high efficiency long training field (HE-LTF) mode among a plurality of HE-LTF modes including a 4x HE-LTF mode and a 2x HE-LTF mode;

    generating an HE-LTF symbol by using a portion or an entirety of an HE-LTF sequence corresponding to the 20 MHz channel bandwidth and the determined HE-LTF mode, wherein the HE-LTF sequence is among a plurality of HE-LTF sequences for the plurality of bandwidths and the plurality of HE-LTF modes, wherein the HE-LTF sequence includes zero values on every odd subcarrier index of a first range of subcarrier indices and a second range of subcarrier indices, non-zero values on every even subcarrier index of the first range and the second range, and direct current tones on subcarrier indices of a third range of subcarrier indices; and

    transmitting a high efficiency physical layer protocol data unit (HE PPDU) including the HE-LTF symbol, in the 20 MHz channel bandwidth.

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