Ok, we've found the problem ourselves: http://code.google.com/p/wimax-scanner/source/detail?r=a3f58c295ed975acd4f6cfac7687bac4c260dfe8 Now we can see DL-MAP in our test captures.
On Fri, Apr 8, 2011 at 13:15, Alexander Chemeris <alexander.cheme...@gmail.com> wrote: > Hi all, > > This is a little bit offtopic for this mailing list, but I can't find > a better place to ask this question. > > We're doing an open-source project on WiMAX decoding > (http://code.google.com/p/wimax-scanner/) and at this point we have a > trouble with correct subchannelization of DL-PUSC, so we're looking > for some advise on what we're doing wrong. Or may someone could just > contribute some code for correct subchannelization? > > My implementation is available as Matlab code and as Excel spreadsheet here: > http://code.google.com/p/wimax-scanner/source/browse/matlab/get_slot_data.m > http://code.google.com/p/wimax-scanner/source/browse/matlab/PUSC-permutation.xls > It is able to correctly list sub-carriers for FCH of segment 0 (i.e. > for subchannels 0-3), but looks like it gives incorrect results for > all other subchannels. The result of this is that I can see only two > consecutive repetitions of slot data in DL-MAP part of the header, > where I should see 4 or 6 repetitions. The standard is very vague and > unclear on this topic and people who write textbooks certainly thinks > it's an obvious part and no one document it in an understandable way. > > If you have a working implementation of DL-PUSC subchannelization, > which you can't share with us, we would appreciate if you just share > mappings of subchannels to sub-carriers for a few sets of parameters. > That would be very helpful for us to debug our own code. > > PS If you're interested in contributing to an open-source WiMAX > implementation - you're very welcome to join the effort! We believe we > can make a real difference in the wireless world. > > -- > Regards, > Alexander Chemeris. > http://www.fairwaves.ru > -- Regards, Alexander Chemeris. http://www.fairwaves.ru _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
