On 31.08.2015 07:15, zs wrote: > According to the step 2 and step3, we copy the > d_items_per_symbol * d_itemsize bytes after (in + d_gi * d_itemsize) to > the output.In the example, cdef+abcdef,the d_gi is 4. (in + d_gi * > d_itemsize) will correspond to the c.Then output d_items_per_symbol is > 6,then output cdef..But the true head data is abcdef,so I think maybe > the source code have some problems.Is my understanding right?
Not sure I'm understanding you correctly, but maybe these factoids help you: - If you check out ofdm_rx.grc, you'll see a couple of delays that try and align things. - The qa_ofdm_*.py files check the OFDM stuff pretty exhaustively, and you might be interested in qa_ofdm_sync_sc_cfb.py in particular. - If we start copying at the first 'e' in your example, the receiver will still work fine (minus a phase offset). Cheers, Martin _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
