Dhrubo , demodulator->correlator->framer_sink Correlator (input=1 bit-per-byte) detects the header while framer_sink separates the payload. Output of correlator the 1st bit location represents input data (1 bit-per-byte) while 2nd bit location represents the detection of header. Framer sinks keeps on checking this 2nd bit and separates payload bits.
-Adeel On Thu, Mar 1, 2012 at 1:37 AM, Dhrubojyoti Roy <dhrubojyoti....@gmail.com>wrote: > Dear All, > > I was exploring the narrowband benchmark codes, I am not able to figure > out how the header of an incoming packet is read. It appears that the > connections made are: > > uhd_receiver->[channel_filter->(demodulator->correlator->framer_sink)] > where framer_sink has the received packet queue. However, the queue_watcher > function is defined so to unmake the payload, which means that the header > has been read apriori. I would like to know in which step the packet header > is read, and how to access the signal processing block that does it. > > I need to customize the packet header and add extra processing to the > header decoding block. Any help would be much appreciated. > > Thanks and Regards, > Dhrubo > > -- > Dhrubojyoti Roy > 1655, North 4th Street, Apt-D > Columbus, OH-43201 > Contact no.: +1-740-417-5890 > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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