LB84 Submission: Updated LDPC Encoding Figure to Resolve CID #940 Month Year doc.: IEEE 802.11-yy/xxxxr0 September 2006 LB84 Submission: Updated LDPC Encoding Figure to Resolve CID #940 Date: 2006-08-25 Authors: Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <stuart.kerry@philips.com> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <patcom@ieee.org>. George Vlantis (STMicro) & Victor Stolpman (Nokia) John Doe, Some Company

Month Year doc.: IEEE 802.11-yy/xxxxr0 September 2006 Background The Proposed Figure on Slide #4 resolves the Deferred CID #940 (see below). This Figure would replace: Figure n60 of sub-clause 20.3.4.3.3.4 “LDPCC PPDU encoding process” in Draft P802.11n-D1.0 Figure n63 of sub-clause 21.3.10.6.5 “LDPC PPDU encoding process” in Draft P802.11n-D1.01 Figure n62 of sub-clause 21.3.10.6.5 “LDPC PPDU encoding process” in Draft P802.11n-D1.02 Figure n61 of sub-clause 21.3.10.6.5 “LDPC PPDU encoding process” in Draft P802.11n-D1.03 George Vlantis (STMicro) & Victor Stolpman (Nokia) John Doe, Some Company

Original Figure n60 of Draft 802.11n-D1.0 September 2006 Original Figure n60 of Draft 802.11n-D1.0 Data Bits Shorten Bits Shorten Parity Repeat (c) LDPCC Encoding (d) (e) Puncture Repeated Bits Systematic Portion of Codeword In 801.11n-D1.0 draft, the caption for the Figure read “Figure n60—LDPCC PPDU encoding padding and puncturing of a single code word”. George Vlantis (STMicro) & Victor Stolpman (Nokia)

Proposed Replacement Figure n61 of Draft 802.11n-D1.03 September 2006 Proposed Replacement Figure n61 of Draft 802.11n-D1.03 LDPC Encoding (concatenate parity) Data Bits Shortened (c) Parity (Discard Shortened Bits) (d) (Discard Punctured Bits) Repeat Copy Repeat Bits (e) Improvements to Figure: Editorial: “LDPCC” changed to “LDPC”. Editorial: “Shorten Bits” changed to “Shortened Bits”. “LDPC encoding (concatenate parity)” and “Discard of Shortened Bits” steps specified. Graphical representation of punctured bits being discarded and repeated padding bits being copied are illustrated. Maintains paragraph lettering of the “LDPC PPDU encoding process” in agreement with textual description, the solid directional arrows indicating direction of puncturing and repetition, and the exclusive possibilities of puncturing or repetition. Same caption as Draft 802.11n-D1.03: “Figure n61—LDPC PPDU encoding padding and puncturing of a single code word”. George Vlantis (STMicro) & Victor Stolpman (Nokia)

Editorial Instructions September 2006 Editorial Instructions TGn Editor: Replace Figure n61 of sub-clause 21.3.10.6.5 “LDPC PPDU encoding process” in Draft P802.11n-D1.03 with the Figure on the previous slide, Slide #4. (Do not include the title above the figure nor the “Improvements to Figure” text below the figure on Slide #4. The caption for the Figure remains the same in this draft.) Results: Y = ; N = ; A = George Vlantis (STMicro) & Victor Stolpman (Nokia)