[STDS-802-16] Fwd: 802.16-2004
>Date: Tue, 05 Jul 2005 11:26:05 -0700
>From: Mike Paff <mpaff@pacbell.net>
>To: r.b.marks@ieee.org
>Subject: 802.16-2004
>
>I have the following question, which relates to what I think is an error in the OFDM section of the standard.
>
>Page 445 includes an example of subchannelization using 16 QAM. This example was not in the previous version of the standard. I was able to verify all the information in this section (8.3.3.5.2) with the exception of the modulation. The transition from interleaved data to subcarrier mapping should be governed by the 16QAM diagram in figure 203. If I swap the order of bits in the diagram (b1b0 and b3b2 become b0b1 and b2b3) I can get the results in the example to agree.
>
>Which is correct, the example, or the figure? If one manufacturer assumes the example is correct and anther assumes that the figure is correct, the equipment from the two manufacturers will not operate correctly together in 16QAM mode.
>Let me know if there is anything I can do to help resolve this. I contributed the original example coding back in 2001, and I think the examples go a long way in clarifying the details.