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Low bandwidth PHY for WLAN

  • US 8,826,106 B2
  • Filed: 06/12/2012
  • Issued: 09/02/2014
  • Est. Priority Date: 06/15/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating a first data unit corresponding to a first physical layer (PHY) mode, wherein generating the first data unit includes(a) forward error correction (FEC) encoding a first plurality of information bits,(b) mapping the FEC-encoded first plurality of information bits to a first plurality of constellation symbols, and(c) generating a first plurality of orthogonal frequency division multiplexing (OFDM) symbols to include the first plurality of constellation symbols, wherein the first plurality of OFDM symbols (i) utilizes a first tone spacing, and (ii) includes a first number of non-zero tones collectively spanning a first bandwidth; and

    generating a second data unit corresponding to a second PHY mode, wherein generating the second data unit includes(a) FEC encoding a second plurality of information bits,(b) block encoding the FEC-encoded second plurality of information bits,(c) mapping the block-encoded second plurality of information bits to a second plurality of constellation symbols, and(d) generating a second plurality of OFDM symbols to include the second plurality of constellation symbols, whereinthe second plurality of OFDM symbols (i) utilizes the first tone spacing, and (ii) includes a second number of non-zero tones collectively spanning a second bandwidth,the second number of non-zero tones is less than the first number of non-zero tones, andthe second bandwidth is less than the first bandwidth.

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