Please download the dossier by clicking on the dossier button x
×

Padding for orthogonal frequency division multiplexing (OFDM) symbols in a wireless communication system

  • US 10,469,297 B2
  • Filed: 10/25/2018
  • Issued: 11/05/2019
  • Est. Priority Date: 06/11/2014
  • Status: Active Grant
First Claim
Patent Images

1. A method for generating a multi-user physical layer (PHY) data unit for transmission via a communication channel, the method comprising:

  • determining, at a first communication device, a number of orthogonal frequency division multiplexing (OFDM) symbols for the multi-user PHY data unit based on respective sets of information bits corresponding to respective second communication devices;

    determining, at the first communication device, a common boundary within a last OFDM symbol of the PHY data unit based on the respective sets of information bits corresponding to respective second communication devices;

    adding, at the first communication device, respective numbers of pre-encoder padding bits to the respective sets of information bits corresponding to respective second communication devices to generate respective sets of padded information bits corresponding to the respective second communication devices, wherein the respective numbers of pre-encoder padding bits are determined such that the padded information bits, after being encoded, fill one or more OFDM symbols up to the common boundary within the last OFDM symbol;

    encoding, at the first communication device, the respective sets of padded information bits to generate respective sets of coded bits;

    generating, at the first communication device, the one or more OFDM symbols of the PHY data unit to include (i) the respective sets of coded information bits in an initial portion of the one or more OFDM symbols up to the common boundary within the last OFDM symbol, and (ii) respective sets of post-encoder padding bits, added to the respective sets of coded bits, in a remaining portion of the last OFDM symbol following the common boundary; and

    including, at the first communication device, an indication of the common boundary in a PHY preamble of the PHY data unit to inform the second communication devices of the common boundary so that the second communication devices can stop decoding the one or more OFDM symbols after decoding the initial portion of the one or more OFDM symbols.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×