[Discuss-gnuradio] Polyphase Clock Sync, lost samples - grc3.7.9

[Landsman, Arik]

Hello,

Noticed interesting behavior for the PPCS block - sending a short qpsk msg (30bytes or so), approximately 10byte at the end of the msg get lost.

in comparison, only one byte gets lost with the Recovery MM. But maybe it is lost elsewhere.

adding padding (zero or otherwise) to the end of the sources file pushes the rest of the msg out.

So this can be fixed in the flowgraph, but frankly the zero padding should probably be added in the PPCS block itself.

Unless this is intended?.. I suppose it get complex to account for all use case, especially since the filter taps are passed in.

had anyone encountered this before, and if so, was the solution just to mux in zeros to the end of the received msg?

Thanks,
Arik

Arik Landsman
Tufts University, ECE