On Tue, Jun 22, 2010 at 11:31 PM, Kyle Zhou <kyle...@gmail.com> wrote: > I am testing the gr_mpsk_receiver_cc module using the code attached at the > end. > It is gnuradio v3.3.1git-11-ge20160b7 on cygwin 1.7.5-1 with gcc 3.4.4. > When I run the code, the following error pops up: > =========================== > assertion "imu >= 0" failed: file "gri_mmse_fir_interpolator_cc.cc", line > 67, fu > nction: gr_complex gri_mmse_fir_interpolator_cc::interpolate(const > gr_complex*, > float) > Aborted (core dumped) > =========================== > > Digging into the source code, I found that the interpolator at line 306 of > gr_mpsk_receiver_cc.cc return NaN when the inputs are all zeros. > line 306: gr_complex interp_sample = d_interp->interpolate(&d_dl[d_dl_idx], > d_mu); > > trying it on ubuntu produced no problem. > > Is this an known bug? > Kyle
The error suggests that the d_mu value is < 0, which is unrelated to the inputs being all 0. There should be no problem with inputs being all 0, and if d_mu is less than 0, something is going wrong. Not sure what to tell you right now, but more debug information would be helpful. Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
