Re: [Discuss-gnuradio] Unable to find header decoding block

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.roy@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

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