Ah, never mind. I declared occupied/pilot carriers and sync words incorrectly. For example,
it must not be ((-3, -1, 1, 3)) but must be (-3, -1, 1, 3),). I forgot putting a comma. Regards, Jeon. On Thu, Dec 22, 2016 at 5:14 PM, Jeon <sjeon87+gnura...@gmail.com> wrote: > I made a simple flow graph using OFDM Carrier Allocator. Please see the > attachment. If the attachment is not available, screenshot of it can be > found at http://imgur.com/v7aPL7J > (Almost same as http://gnuradio.org/doc/doxygen-3.7/page_ofdm.html#ofdm_tx > ) > > When I run the flow graph, it immediately stops running. To debug, I look > into `dmesg`, and it shows: > > *[12785.433257] traps: ofdm_carrier_al[23633] trap divide error > ip:7fe08fb3f375 sp:7fe073ffe610 error:0 in libgnuradio-digital-3.7.10git.* > *so.0.0.0[7fe08faa2000+f4000]* > > It's somewhat frustrating because I didn't modify the OFDM Carrier > Allocator block. Could anyone suggest a starting point to debug it? > > OS is Ubuntu 14.04, kernel 3.13.0-96, 64-bit > GNU Radio version is v3.7.9.2 > If more information is required, please let me know it. > > Regards, > Jeon. >
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