On Sun, Feb 04, 2007 at 02:32:30AM -0800, Brett Trotter wrote: > > After coming up with some scripts to generate thousands of 200-byte random > files and attempt to transfer them over a GMSK link, I isolated 5 of 10,000 > 'files' that cause the packet to be dropped (when the MTU is big enough to > hold the entire 200 bytes- which should be all the time)- most likely due to > repeated zeros or ones that cause a loss of sync. Upon debugging the output > after the whitener, it does appear that there are instances of around > 12-zeros in the packets that don't work.
What's the maximum run length that you see in packets that _do_ work? My understanding from talking to Johnathan is that he has some packets that work that have 17-bit runs in them (post-whitener). (Not sure if they're ones or zeros.) This makes me think that the 8b/10b "solution" is premature, given that the problematic symptom is not yet nailed-down. In summary, create the smallest test case you can that reproduces the problem. When you've got that under control, figure out the next step. I suspect that some adjusting of control loop constants may be in order. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
