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Efficient 256-QAM Mapping for 802.11 Standards Enhancement

Explore 256-QAM bit labeling in IEEE 802.11 standard and propose extrapolation from 802.11n for efficient mapping. Approve proposed constellation mapping for Specification Framework document.

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Efficient 256-QAM Mapping for 802.11 Standards Enhancement

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  1. 256 QAM Mapping Authors: Date: 2010-07-12 https://mentor.ieee.org/802.11/dcn/10/11-10-0857-00-00ac-256qam-mapping.ppt Slide 1 Joseph Lauer et.al, Broadcom

  2. Introduction • Bit labeling for BPSK, QPSK, 16 QAM, and 64 QAM defined in 802.11 standard has the following characeritics: • Independent Gray coding on I & Q axis • I bits followed by Q bits • Most negative symbol value corresponds to all 0’s • Need to specify mapping for 256 QAM • We propose simply to extrapolate from already defined constellations in 802.11n 4 bit Gray coding for each dimension Joseph Lauer et.al, Broadcom

  3. Corresponding 256 QAM Constellation Joseph Lauer et.al, Broadcom

  4. Straw Poll • Do you accept the 256 QAM constellation mapping as shown on Slide 3 of this document to be included into the Specification Framework document 11-09/0992 ? Joseph Lauer et.al, Broadcom

  5. Motion • Move to accept the 256 QAM constellation mapping as shown on Slide 3 of this document to be included into the Specification Framework document 11-09/0992 . Joseph Lauer et.al, Broadcom

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