Hi list, I have looked at the digital rx example, and there is at least one thing in particular that have caught my attention.
In the receive path, the channel- filters output is connected to two blocks, first a carrier- sense (gr_probe_avg_mag_sqrd_c) and second a "packet receiver". In the packet receive block, the connection chain is: Demodulator -> Access- code correlator -> gr_frame_sink_1 The frame sink does know if gr_access_correlator_bb has found an access code through the flag- bit in the correlators output. But I can't find any flag or similar for detecting the state of the carrier probe. Shouldn't this be checked for since one might get a false trigger from the Access code correlate block with the usrp receiving noise. Can someone please clarify where/how/if the state of the probe is used? Or is it the probability that noise generates the correlation bit- sequence and a correct header, witch makes the frame_sink_1 put it in its message_queue, that there is no need to check the probe status. In that case, what is the probe doing there? Best regards, //Mattias Kjellsson _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
