1. LB84 Submission: Updated LDPC Encoding Figure to Resolve CID #940
Month Year
doc.: IEEE yy/xxxxr0
September 2006
LB84 Submission: Updated LDPC Encoding Figure to Resolve CID #940
Date:
Authors:
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George Vlantis (STMicro) & Victor Stolpman (Nokia)
John Doe, Some Company

2. Month Year
doc.: IEEE 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 “LDPCC PPDU encoding process” in Draft P802.11n-D1.0
Figure n63 of sub-clause “LDPC PPDU encoding process” in Draft P802.11n-D1.01
Figure n62 of sub-clause “LDPC PPDU encoding process” in Draft P802.11n-D1.02
Figure n61 of sub-clause “LDPC PPDU encoding process” in Draft P802.11n-D1.03
George Vlantis (STMicro) & Victor Stolpman (Nokia)
John Doe, Some Company

3. Original Figure n60 of Draft 802.11n-D1.0
September 2006
Original Figure n60 of Draft n-D1.0
Data
Bits
Shorten Bits
Shorten
Parity
Repeat
(c)
LDPCC Encoding
(d)
(e)
Puncture
Repeated Bits
Systematic Portion of Codeword
In n-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)

4. Proposed Replacement Figure n61 of Draft 802.11n-D1.03
September 2006
Proposed Replacement Figure n61 of Draft n-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 n-D1.03: “Figure n61—LDPC PPDU encoding padding and puncturing of a single code word”.
George Vlantis (STMicro) & Victor Stolpman (Nokia)

5. Editorial Instructions
September 2006
Editorial Instructions
TGn Editor: Replace Figure n61 of sub-clause “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)